cardiolipin synthase ClsB [Burkholderia thailandensis]
phospholipase D-like domain-containing protein( domain architecture ID 11445347)
phospholipase D-like domain-containing protein; similar to Bacillus subtilis minor cardiolipin synthase ClsB involved in the biosynthesis of cardiolipin
List of domain hits
Name | Accession | Description | Interval | E-value | ||||||
Cls | COG1502 | Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and ... |
23-408 | 2.67e-91 | ||||||
Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and metabolism]; Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase is part of the Pathway/BioSystem: Phospholipid biosynthesis : Pssm-ID: 441111 [Multi-domain] Cd Length: 367 Bit Score: 280.29 E-value: 2.67e-91
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Name | Accession | Description | Interval | E-value | |||||||
Cls | COG1502 | Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and ... |
23-408 | 2.67e-91 | |||||||
Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and metabolism]; Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase is part of the Pathway/BioSystem: Phospholipid biosynthesis Pssm-ID: 441111 [Multi-domain] Cd Length: 367 Bit Score: 280.29 E-value: 2.67e-91
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PRK11263 | PRK11263 | cardiolipin synthase ClsB; |
30-376 | 1.59e-77 | |||||||
cardiolipin synthase ClsB; Pssm-ID: 236888 [Multi-domain] Cd Length: 411 Bit Score: 246.40 E-value: 1.59e-77
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PLDc_ybhO_like_2 | cd09159 | Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase ybhO and similar proteins; ... |
239-408 | 7.49e-49 | |||||||
Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase ybhO and similar proteins; Catalytic domain, repeat 2, of Escherichia coli cardiolipin (CL) synthase ybhO and similar proteins. In Escherichia coli, there are two genes, f413 (ybhO) and o493 (ymdC), which are homologous to gene cls that encodes the Escherichia coli CL synthase. The prototype of this subfamily is Escherichia coli CL synthase ybhO specified by the f413 (ybhO) gene. ybhO is a membrane-bound protein that catalyzes the formation of cardiolipin (CL) by transferring phosphatidyl group between two phosphatidylglycerol molecules. It can also catalyze phosphatidyl group transfer to water to form phosphatidate. In contrast to the Escherichia coli CL synthase encoded by the cls gene (EcCLS), ybhO does not hydrolyze CL. Moreover, ybhO lacks an N-terminal segment encoded by Escherichia coli cls, which makes ybhO easy to denature. The monomer of ybhO consists of two catalytic domains. Each catalytic domain contains one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. Two HKD motifs from two domains form a single active site involved in phosphatidyl group transfer. ybhO can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity belonging to the PLD superfamily. Pssm-ID: 197256 [Multi-domain] Cd Length: 170 Bit Score: 163.86 E-value: 7.49e-49
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bac_cardiolipin | TIGR04265 | cardiolipin synthase; This model is based on experimentally characterized bacterial ... |
2-402 | 1.22e-46 | |||||||
cardiolipin synthase; This model is based on experimentally characterized bacterial cardiolipin synthases (cls) from E. coli, Staphylococcus aureus (two), and Bacillus pseudofirmus OF4. This model describes just one of several homologous but non-orthologous forms of cls. The cutoff score is set arbitrarily high to avoid false-positives. Note that there are two enzymatic activites called cardiolipin synthase. This model represents type 1, which does not rely on a CDP-linked donor, but instead does a reversible transfer of a phosphatidyl group from one phosphatidylglycerol molecule to another. Pssm-ID: 211988 [Multi-domain] Cd Length: 483 Bit Score: 166.89 E-value: 1.22e-46
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PLDc_2 | pfam13091 | PLD-like domain; |
254-376 | 4.06e-21 | |||||||
PLD-like domain; Pssm-ID: 463784 [Multi-domain] Cd Length: 132 Bit Score: 88.50 E-value: 4.06e-21
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Name | Accession | Description | Interval | E-value | |||||||
Cls | COG1502 | Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and ... |
23-408 | 2.67e-91 | |||||||
Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase [Lipid transport and metabolism]; Phosphatidylserine/phosphatidylglycerophosphate/cardiolipin synthase is part of the Pathway/BioSystem: Phospholipid biosynthesis Pssm-ID: 441111 [Multi-domain] Cd Length: 367 Bit Score: 280.29 E-value: 2.67e-91
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PRK11263 | PRK11263 | cardiolipin synthase ClsB; |
30-376 | 1.59e-77 | |||||||
cardiolipin synthase ClsB; Pssm-ID: 236888 [Multi-domain] Cd Length: 411 Bit Score: 246.40 E-value: 1.59e-77
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cls | PRK01642 | cardiolipin synthetase; Reviewed |
25-408 | 5.22e-52 | |||||||
cardiolipin synthetase; Reviewed Pssm-ID: 234967 [Multi-domain] Cd Length: 483 Bit Score: 181.52 E-value: 5.22e-52
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PLDc_ybhO_like_2 | cd09159 | Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase ybhO and similar proteins; ... |
239-408 | 7.49e-49 | |||||||
Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase ybhO and similar proteins; Catalytic domain, repeat 2, of Escherichia coli cardiolipin (CL) synthase ybhO and similar proteins. In Escherichia coli, there are two genes, f413 (ybhO) and o493 (ymdC), which are homologous to gene cls that encodes the Escherichia coli CL synthase. The prototype of this subfamily is Escherichia coli CL synthase ybhO specified by the f413 (ybhO) gene. ybhO is a membrane-bound protein that catalyzes the formation of cardiolipin (CL) by transferring phosphatidyl group between two phosphatidylglycerol molecules. It can also catalyze phosphatidyl group transfer to water to form phosphatidate. In contrast to the Escherichia coli CL synthase encoded by the cls gene (EcCLS), ybhO does not hydrolyze CL. Moreover, ybhO lacks an N-terminal segment encoded by Escherichia coli cls, which makes ybhO easy to denature. The monomer of ybhO consists of two catalytic domains. Each catalytic domain contains one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. Two HKD motifs from two domains form a single active site involved in phosphatidyl group transfer. ybhO can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity belonging to the PLD superfamily. Pssm-ID: 197256 [Multi-domain] Cd Length: 170 Bit Score: 163.86 E-value: 7.49e-49
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PLDc_CLS_1 | cd09110 | Catalytic domain, repeat 1, of bacterial cardiolipin synthase and similar proteins; Catalytic ... |
40-187 | 1.17e-47 | |||||||
Catalytic domain, repeat 1, of bacterial cardiolipin synthase and similar proteins; Catalytic domain, repeat 1, of bacterial cardiolipin (CL) synthase and a few homologs found in eukaryotes and archaea. Bacterial CL synthases catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. The monomer of bacterial CL synthase consists of two catalytic domains. Each catalytic domain contains one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. Two HKD motifs from two domains form a single active site involved in phosphatidyl group transfer. Bacterial CL synthases can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity belonging to the PLD superfamily. Like other PLD enzymes, bacterial CL synthases utilize a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197209 [Multi-domain] Cd Length: 154 Bit Score: 160.33 E-value: 1.17e-47
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bac_cardiolipin | TIGR04265 | cardiolipin synthase; This model is based on experimentally characterized bacterial ... |
2-402 | 1.22e-46 | |||||||
cardiolipin synthase; This model is based on experimentally characterized bacterial cardiolipin synthases (cls) from E. coli, Staphylococcus aureus (two), and Bacillus pseudofirmus OF4. This model describes just one of several homologous but non-orthologous forms of cls. The cutoff score is set arbitrarily high to avoid false-positives. Note that there are two enzymatic activites called cardiolipin synthase. This model represents type 1, which does not rely on a CDP-linked donor, but instead does a reversible transfer of a phosphatidyl group from one phosphatidylglycerol molecule to another. Pssm-ID: 211988 [Multi-domain] Cd Length: 483 Bit Score: 166.89 E-value: 1.22e-46
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PRK12452 | PRK12452 | cardiolipin synthase; |
33-406 | 1.40e-39 | |||||||
cardiolipin synthase; Pssm-ID: 171510 [Multi-domain] Cd Length: 509 Bit Score: 148.14 E-value: 1.40e-39
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PLDc_CLS_2 | cd09112 | catalytic domain repeat 2 of bacterial cardiolipin synthase and similar proteins; This CD ... |
239-407 | 7.57e-34 | |||||||
catalytic domain repeat 2 of bacterial cardiolipin synthase and similar proteins; This CD corresponds to the catalytic domain repeat 2 of bacterial cardiolipin synthase (CL synthase, EC 2.7.8.-) and a few homologs found in eukaryotes and archea. Bacterial CL synthases catalyze reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form cardiolipin (CL) and glycerol. The monomer of bacterial CL synthase consists of two catalytic domains. Each catalytic domain contains one copy of conserved HKD motifs (H-X-K-X(4)-D, X represents any amino acid residue) that are the characteristic of the phospholipase D (PLD) superfamily. Two HKD motifs from two domains together form a single active site involving in phosphatidyl group transfer. Bacterial CL synthases can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity in PLD superfamily. Like other PLD enzymes, bacterial CL synthase utilize a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid stabilizing the leaving group. Pssm-ID: 197211 [Multi-domain] Cd Length: 174 Bit Score: 124.51 E-value: 7.57e-34
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PLDc_EcCLS_like_1 | cd09152 | Catalytic domain, repeat 1, of Escherichia coli cardiolipin synthase and similar proteins; ... |
31-187 | 1.87e-30 | |||||||
Catalytic domain, repeat 1, of Escherichia coli cardiolipin synthase and similar proteins; Catalytic domain, repeat 1, of Escherichia coli cardiolipin (CL) synthase and similar proteins. Escherichia coli CL synthase (EcCLS), specified by the cls gene, is the prototype of this family. EcCLS is a multi-pass membrane protein that catalyzes reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form cardiolipin (CL) and glycerol. The monomer of EcCLS consists of two catalytic domains. Each catalytic domain contains one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. Two HKD motifs from two domains form a single active site involved in phosphatidyl group transfer. EcCLS can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity belonging to the PLD superfamily. Like other PLD enzymes, EcCLS utilizes a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197250 [Multi-domain] Cd Length: 163 Bit Score: 115.00 E-value: 1.87e-30
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PLDc_CLS_unchar2_1 | cd09157 | Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial ... |
39-187 | 2.65e-30 | |||||||
Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial cardiolipin synthase; Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197254 [Multi-domain] Cd Length: 155 Bit Score: 114.20 E-value: 2.65e-30
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PLDc_PaCLS_like_1 | cd09155 | Putative catalytic domain, repeat 1, of Pseudomonas aeruginosa cardiolipin synthase and ... |
40-187 | 1.62e-26 | |||||||
Putative catalytic domain, repeat 1, of Pseudomonas aeruginosa cardiolipin synthase and similar proteins; Putative catalytic domain, repeat 1, of Pseudomonas aeruginosa cardiolipin (CL) synthase (PaCLS) and similar proteins. Although PaCLS and similar proteins have not been functionally characterized, members in this subfamily show high sequence homology to bacterial CL synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Moreover, PaCLS and other members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197252 [Multi-domain] Cd Length: 156 Bit Score: 104.25 E-value: 1.62e-26
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PLDc_CLS_unchar1_1 | cd09156 | Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial ... |
38-187 | 3.83e-26 | |||||||
Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial cardiolipin synthase; Putative catalytic domain, repeat 1, of uncharacterized proteins similar to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197253 [Multi-domain] Cd Length: 154 Bit Score: 103.11 E-value: 3.83e-26
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PLDc_EcCLS_like_2 | cd09158 | Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase and similar proteins; ... |
249-408 | 6.02e-22 | |||||||
Catalytic domain, repeat 2, of Escherichia coli cardiolipin synthase and similar proteins; Catalytic domain, repeat 2, of Escherichia coli cardiolipin (CL) synthase and similar proteins. Escherichia coli CL synthase (EcCLS), specified by the cls gene, is the prototype of this family. EcCLS is a multi-pass membrane protein that catalyzes reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form cardiolipin (CL) and glycerol. The monomer of EcCLS consists of two catalytic domains. Each catalytic domain contains one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. Two HKD motifs from two domains form a single active site involved in phosphatidyl group transfer. EcCLS can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity belonging to the PLD superfamily. Like other PLD enzymes, EcCLS utilizes a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197255 [Multi-domain] Cd Length: 174 Bit Score: 92.25 E-value: 6.02e-22
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PLDc_2 | pfam13091 | PLD-like domain; |
254-376 | 4.06e-21 | |||||||
PLD-like domain; Pssm-ID: 463784 [Multi-domain] Cd Length: 132 Bit Score: 88.50 E-value: 4.06e-21
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PLDc_ymdC_like_1 | cd09111 | Putative catalytic domain, repeat 1, of Escherichia coli uncharacterized protein ymdC and ... |
46-187 | 2.10e-20 | |||||||
Putative catalytic domain, repeat 1, of Escherichia coli uncharacterized protein ymdC and similar proteins; Putative catalytic domain, repeat 1, of Escherichia coli uncharacterized protein ymdC and similar proteins. In Escherichia coli, there are two genes, f413 (ybhO) and o493 (ymdC), which are homologous to gene cls that encodes the Escherichia coli cardiolipin (CL) synthase. The prototype of this subfamily is an uncharacterized protein ymdC specified by the o493 (ymdC) gene. Although the functional characterization of ymdC and similar proteins remains unknown, members of this subfamily show high sequence homology to bacterial CL synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Moreover, ymdC and its similar proteins contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characteriszes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197210 [Multi-domain] Cd Length: 162 Bit Score: 87.59 E-value: 2.10e-20
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PLDc_CLS_unchar2_2 | cd09163 | Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial ... |
250-407 | 2.84e-19 | |||||||
Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial cardiolipin synthase; Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197260 [Multi-domain] Cd Length: 176 Bit Score: 84.53 E-value: 2.84e-19
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PLDc_PaCLS_like_2 | cd09161 | Putative catalytic domain, repeat 2, of Pseudomonas aeruginosa cardiolipin synthase and ... |
254-401 | 8.63e-17 | |||||||
Putative catalytic domain, repeat 2, of Pseudomonas aeruginosa cardiolipin synthase and similar proteins; Putative catalytic domain, repeat 2, of Pseudomonas aeruginosa cardiolipin (CL) synthase (PaCLS) and similar proteins. Although PaCLS and similar proteins have not been functionally characterized, members in this subfamily show high sequence homology to bacterial CL synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Moreover, PaCLS and other members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197258 [Multi-domain] Cd Length: 176 Bit Score: 77.71 E-value: 8.63e-17
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PLDc_2 | pfam13091 | PLD-like domain; |
47-186 | 5.11e-16 | |||||||
PLD-like domain; Pssm-ID: 463784 [Multi-domain] Cd Length: 132 Bit Score: 74.25 E-value: 5.11e-16
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PLDc_ymdC_like_2 | cd09113 | Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and ... |
255-384 | 1.07e-15 | |||||||
Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and similar proteins; Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and similar proteins. In Escherichia coli, there are two genes, f413 (ybhO) and o493 (ymdC), which are homologous to gene cls that encodes the Escherichia coli cardiolipin (CL) synthase. The prototype of this subfamily is an uncharacterized protein ymdC specified by the o493 (ymdC) gene. Although the functional characterization of ymdC and similar proteins remains unknown, members of this subfamily show high sequence homology to bacterial CL synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Moreover, ymdC and its similar proteins contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characteriszes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197212 [Multi-domain] Cd Length: 218 Bit Score: 75.72 E-value: 1.07e-15
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PLDc_SMU_988_like_2 | cd09160 | Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 ... |
251-405 | 3.18e-14 | |||||||
Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins; Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins. Although SMU_988 and similar proteins have not been functionally characterized, members in this subfamily show high sequence homology to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197257 [Multi-domain] Cd Length: 176 Bit Score: 70.22 E-value: 3.18e-14
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PLDc_CLS_unchar1_2 | cd09162 | Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial ... |
245-407 | 2.97e-13 | |||||||
Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial cardiolipin synthase; Putative catalytic domain, repeat 2, of uncharacterized proteins similar to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197259 [Multi-domain] Cd Length: 172 Bit Score: 67.67 E-value: 2.97e-13
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PLDc_SMU_988_like_1 | cd09154 | Putative catalytic domain, repeat 1, of Streptococcus mutans uncharacterized protein SMU_988 ... |
40-175 | 3.57e-13 | |||||||
Putative catalytic domain, repeat 1, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins; Putative catalytic domain, repeat 1, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins. Although SMU_988 and similar proteins have not been functionally characterized, members in this subfamily show high sequence homology to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197251 [Multi-domain] Cd Length: 155 Bit Score: 66.78 E-value: 3.57e-13
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PLDc_SF | cd00138 | Catalytic domain of phospholipase D superfamily proteins; Catalytic domain of phospholipase D ... |
252-364 | 1.99e-11 | |||||||
Catalytic domain of phospholipase D superfamily proteins; Catalytic domain of phospholipase D (PLD) superfamily proteins. The PLD superfamily is composed of a large and diverse group of proteins including plant, mammalian and bacterial PLDs, bacterial cardiolipin (CL) synthases, bacterial phosphatidylserine synthases (PSS), eukaryotic phosphatidylglycerophosphate (PGP) synthase, eukaryotic tyrosyl-DNA phosphodiesterase 1 (Tdp1), and some bacterial endonucleases (Nuc and BfiI), among others. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze the transphosphatidylation of phospholipids to acceptor alcohols. The majority of members in this superfamily contain a short conserved sequence motif (H-x-K-x(4)-D, where x represents any amino acid residue), called the HKD signature motif. There are varying expanded forms of this motif in different family members. Some members contain variant HKD motifs. Most PLD enzymes are monomeric proteins with two HKD motif-containing domains. Two HKD motifs from two domains form a single active site. Some PLD enzymes have only one copy of the HKD motif per subunit but form a functionally active dimer, which has a single active site at the dimer interface containing the two HKD motifs from both subunits. Different PLD enzymes may have evolved through domain fusion of a common catalytic core with separate substrate recognition domains. Despite their various catalytic functions and a very broad range of substrate specificities, the diverse group of PLD enzymes can bind to a phosphodiester moiety. Most of them are active as bi-lobed monomers or dimers, and may possess similar core structures for catalytic activity. They are generally thought to utilize a common two-step ping-pong catalytic mechanism, involving an enzyme-substrate intermediate, to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197200 [Multi-domain] Cd Length: 119 Bit Score: 60.99 E-value: 1.99e-11
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PLDc_SF | cd00138 | Catalytic domain of phospholipase D superfamily proteins; Catalytic domain of phospholipase D ... |
46-158 | 9.43e-11 | |||||||
Catalytic domain of phospholipase D superfamily proteins; Catalytic domain of phospholipase D (PLD) superfamily proteins. The PLD superfamily is composed of a large and diverse group of proteins including plant, mammalian and bacterial PLDs, bacterial cardiolipin (CL) synthases, bacterial phosphatidylserine synthases (PSS), eukaryotic phosphatidylglycerophosphate (PGP) synthase, eukaryotic tyrosyl-DNA phosphodiesterase 1 (Tdp1), and some bacterial endonucleases (Nuc and BfiI), among others. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze the transphosphatidylation of phospholipids to acceptor alcohols. The majority of members in this superfamily contain a short conserved sequence motif (H-x-K-x(4)-D, where x represents any amino acid residue), called the HKD signature motif. There are varying expanded forms of this motif in different family members. Some members contain variant HKD motifs. Most PLD enzymes are monomeric proteins with two HKD motif-containing domains. Two HKD motifs from two domains form a single active site. Some PLD enzymes have only one copy of the HKD motif per subunit but form a functionally active dimer, which has a single active site at the dimer interface containing the two HKD motifs from both subunits. Different PLD enzymes may have evolved through domain fusion of a common catalytic core with separate substrate recognition domains. Despite their various catalytic functions and a very broad range of substrate specificities, the diverse group of PLD enzymes can bind to a phosphodiester moiety. Most of them are active as bi-lobed monomers or dimers, and may possess similar core structures for catalytic activity. They are generally thought to utilize a common two-step ping-pong catalytic mechanism, involving an enzyme-substrate intermediate, to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197200 [Multi-domain] Cd Length: 119 Bit Score: 59.07 E-value: 9.43e-11
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PLDc_unchar1_2 | cd09128 | Putative catalytic domain, repeat 2, of uncharacterized phospholipase D-like proteins; ... |
251-369 | 7.53e-10 | |||||||
Putative catalytic domain, repeat 2, of uncharacterized phospholipase D-like proteins; Putative catalytic domain, repeat 2, of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze transphosphatidylation of phospholipids to acceptor alcohols. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197226 [Multi-domain] Cd Length: 142 Bit Score: 56.90 E-value: 7.53e-10
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PLDc_Nuc_like | cd09116 | Catalytic domain of EDTA-resistant nuclease Nuc, vertebrate phospholipase D6, and similar ... |
47-189 | 2.19e-09 | |||||||
Catalytic domain of EDTA-resistant nuclease Nuc, vertebrate phospholipase D6, and similar proteins; Catalytic domain of EDTA-resistant nuclease Nuc, vertebrate phospholipase D6 (PLD6, EC 3.1.4.4), and similar proteins. Nuc is an endonuclease from Salmonella typhimurium and the smallest known member of the PLD superfamily. It cleaves both single- and double-stranded DNA. PLD6 selectively hydrolyzes the terminal phosphodiester bond of phosphatidylcholine (PC), with the formation of phosphatidic acid and alcohols. Phosphatidic acid is an essential compound involved in signal transduction. PLD6 also catalyzes the transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. Both Nuc and PLD6 belong to the phospholipase D (PLD) superfamily. They contain a short conserved sequence motif, the HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue), which is essential for catalysis. PLDs utilize a two-step mechanism to cleave phosphodiester bonds: Upon substrate binding, the bond is first attacked by a histidine residue from one HKD motif to form a covalent phosphohistidine intermediate, which is then hydrolyzed by water with the aid of a second histidine residue from the other HKD motif in the opposite subunit. This subfamily also includes some uncharacterized hypothetical proteins, which have two HKD motifs in a single polypeptide chain. Pssm-ID: 197215 [Multi-domain] Cd Length: 138 Bit Score: 55.38 E-value: 2.19e-09
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PLDc_unchar1_2 | cd09128 | Putative catalytic domain, repeat 2, of uncharacterized phospholipase D-like proteins; ... |
46-186 | 8.31e-09 | |||||||
Putative catalytic domain, repeat 2, of uncharacterized phospholipase D-like proteins; Putative catalytic domain, repeat 2, of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze transphosphatidylation of phospholipids to acceptor alcohols. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197226 [Multi-domain] Cd Length: 142 Bit Score: 53.82 E-value: 8.31e-09
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PLDc_vPLD1_2_like_2 | cd09105 | Catalytic domain, repeat 2, of vertebrate phospholipases, PLD1 and PLD2, and similar proteins; ... |
247-365 | 9.42e-08 | |||||||
Catalytic domain, repeat 2, of vertebrate phospholipases, PLD1 and PLD2, and similar proteins; Catalytic domain, repeat 2, of phospholipase D (PLD, EC 3.1.4.4) found in yeast, plants, and vertebrates, and their bacterial homologs. PLDs are involved in signal transduction, vesicle formation, protein transport, and mitosis by participating in phospholipid metabolism. They hydrolyze the terminal phosphodiester bond of phospholipids resulting in the formation of phosphatidic acid and alcohols. Phosphatidic acid is an essential compound involved in signal transduction. PLDs also catalyze the transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. Both prokaryotic and eukaryotic PLDs have two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. PLDs are active as bi-lobed monomers. Each monomer contains two domains, each of which carries one copy of the HKD motif. Two HKD motifs from two domains form a single active site. PLDs utilize a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. Pssm-ID: 197204 [Multi-domain] Cd Length: 146 Bit Score: 51.15 E-value: 9.42e-08
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PLDc_unchar1_1 | cd09127 | Putative catalytic domain, repeat 1, of uncharacterized phospholipase D-like proteins; ... |
47-177 | 1.45e-07 | |||||||
Putative catalytic domain, repeat 1, of uncharacterized phospholipase D-like proteins; Putative catalytic domain, repeat 1, of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze transphosphatidylation of phospholipids to acceptor alcohols. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197225 [Multi-domain] Cd Length: 141 Bit Score: 50.34 E-value: 1.45e-07
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PLDc_CLS_2 | cd09112 | catalytic domain repeat 2 of bacterial cardiolipin synthase and similar proteins; This CD ... |
46-155 | 2.47e-07 | |||||||
catalytic domain repeat 2 of bacterial cardiolipin synthase and similar proteins; This CD corresponds to the catalytic domain repeat 2 of bacterial cardiolipin synthase (CL synthase, EC 2.7.8.-) and a few homologs found in eukaryotes and archea. Bacterial CL synthases catalyze reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form cardiolipin (CL) and glycerol. The monomer of bacterial CL synthase consists of two catalytic domains. Each catalytic domain contains one copy of conserved HKD motifs (H-X-K-X(4)-D, X represents any amino acid residue) that are the characteristic of the phospholipase D (PLD) superfamily. Two HKD motifs from two domains together form a single active site involving in phosphatidyl group transfer. Bacterial CL synthases can be stimulated by phosphate and inhibited by CL, the product of the reaction, and by phosphatidate. Phosphate stimulation may be unique to enzymes with CL synthase activity in PLD superfamily. Like other PLD enzymes, bacterial CL synthase utilize a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid stabilizing the leaving group. Pssm-ID: 197211 [Multi-domain] Cd Length: 174 Bit Score: 50.55 E-value: 2.47e-07
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PLDc_vPLD6_like | cd09171 | Catalytic domain of vertebrate phospholipase D6 and similar proteins; Catalytic domain of ... |
41-147 | 2.12e-06 | |||||||
Catalytic domain of vertebrate phospholipase D6 and similar proteins; Catalytic domain of vertebrate phospholipase D6 (PLD6, EC 3.1.4.4), a homolog of the EDTA-resistant nuclease Nuc from Salmonella typhimurium, and similar proteins. PLD6 can selectively hydrolyze the terminal phosphodiester bond of phosphatidylcholine (PC) with the formation of phosphatidic acid and alcohols. Phosphatidic acid is an essential compound involved in signal transduction. It also catalyzes the transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. PLD6 belongs to the phospholipase D (PLD) superfamily. Its monomer contains a short conserved sequence motif, H-x-K-x(4)-D (where x represents any amino acid residue), termed the HKD motif, which is essential in catalysis. PLD6 is more closely related to the nuclease Nuc than to other vertebrate phospholipases, which have two copies of the HKD motif in a single polypeptide chain. Like Nuc, PLD6 may utilize a two-step mechanism to cleave phosphodiester bonds: Upon substrate binding, the bond is first attacked by a histidine residue from the HKD motif of one subunit to form a covalent phosphohistidine intermediate, which is then hydrolyzed by water with the aid of a second histidine residue from the other HKD motif in the opposite subunit. Pssm-ID: 197268 [Multi-domain] Cd Length: 136 Bit Score: 46.83 E-value: 2.12e-06
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PLDc_Nuc | cd09170 | Catalytic domain of EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar ... |
38-147 | 2.57e-06 | |||||||
Catalytic domain of EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar proteins; Catalytic domain of an EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar proteins. Nuc is an endonuclease cleaving both single- and double-stranded DNA. It is the smallest known member of the phospholipase D (PLD, EC 3.1.4.4) superfamily that includes a diverse group of proteins with various catalytic functions. Most members of this superfamily have two copies of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) in a single polypeptide chain and both are required for catalytic activity. However, Nuc only has one copy of the HKD motif per subunit but form a functionally active homodimer (it is most likely also active in solution as a multimeric protein), which has a single active site at the dimer interface containing the HKD motifs from both subunits. Due to the lack of a distinct domain for DNA binding, Nuc cuts DNA non-specifically. It utilizes a two-step mechanism to cleave phosphodiester bonds: Upon substrate binding, the bond is first attacked by a histidine residue from one HKD motif to form a covalent phosphohistidine intermediate, which is then hydrolyzed by water with the aid of a second histidine residue from the other HKD motif in the opposite subunit. Pssm-ID: 197267 [Multi-domain] Cd Length: 142 Bit Score: 46.74 E-value: 2.57e-06
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PLDc_SMU_988_like_2 | cd09160 | Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 ... |
51-147 | 6.92e-06 | |||||||
Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins; Putative catalytic domain, repeat 2, of Streptococcus mutans uncharacterized protein SMU_988 and similar proteins. Although SMU_988 and similar proteins have not been functionally characterized, members in this subfamily show high sequence homology to bacterial cardiolipin (CL) synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197257 [Multi-domain] Cd Length: 176 Bit Score: 46.34 E-value: 6.92e-06
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PLDc_unchar3 | cd09131 | Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic ... |
290-365 | 9.29e-06 | |||||||
Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic domain of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. Members of this subfamily contain one copy of HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. Pssm-ID: 197229 [Multi-domain] Cd Length: 143 Bit Score: 45.02 E-value: 9.29e-06
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PLDc_unchar3 | cd09131 | Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic ... |
43-147 | 1.43e-05 | |||||||
Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic domain of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. Members of this subfamily contain one copy of HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. Pssm-ID: 197229 [Multi-domain] Cd Length: 143 Bit Score: 44.64 E-value: 1.43e-05
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PLDc_unchar1_1 | cd09127 | Putative catalytic domain, repeat 1, of uncharacterized phospholipase D-like proteins; ... |
255-376 | 3.29e-05 | |||||||
Putative catalytic domain, repeat 1, of uncharacterized phospholipase D-like proteins; Putative catalytic domain, repeat 1, of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. PLD enzymes hydrolyze phospholipid phosphodiester bonds to yield phosphatidic acid and a free polar head group. They can also catalyze transphosphatidylation of phospholipids to acceptor alcohols. Members of this subfamily contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197225 [Multi-domain] Cd Length: 141 Bit Score: 43.41 E-value: 3.29e-05
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YrhO | COG1378 | Sugar-specific transcriptional regulator TrmB [Transcription]; |
47-188 | 1.46e-04 | |||||||
Sugar-specific transcriptional regulator TrmB [Transcription]; Pssm-ID: 440988 [Multi-domain] Cd Length: 238 Bit Score: 43.09 E-value: 1.46e-04
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PLDc_ymdC_like_2 | cd09113 | Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and ... |
44-144 | 2.53e-04 | |||||||
Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and similar proteins; Putative catalytic domain, repeat 2, of Escherichia coli uncharacterized protein ymdC and similar proteins. In Escherichia coli, there are two genes, f413 (ybhO) and o493 (ymdC), which are homologous to gene cls that encodes the Escherichia coli cardiolipin (CL) synthase. The prototype of this subfamily is an uncharacterized protein ymdC specified by the o493 (ymdC) gene. Although the functional characterization of ymdC and similar proteins remains unknown, members of this subfamily show high sequence homology to bacterial CL synthases, which catalyze the reversible phosphatidyl group transfer between two phosphatidylglycerol molecules to form CL and glycerol. Moreover, ymdC and its similar proteins contain two HKD motifs (H-x-K-x(4)-D, where x represents any amino acid residue) that characteriszes the phospholipase D (PLD) superfamily. The two motifs may be part of the active site and may be involved in phosphatidyl group transfer. Pssm-ID: 197212 [Multi-domain] Cd Length: 218 Bit Score: 42.21 E-value: 2.53e-04
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PLDc_vPLD1_2_like_bac_2 | cd09143 | Catalytic domain, repeat 2, of uncharacterized bacterial proteins with similarity to ... |
247-364 | 7.77e-04 | |||||||
Catalytic domain, repeat 2, of uncharacterized bacterial proteins with similarity to vertebrate phospholipases, PLD1 and PLD2; Catalytic domain, repeat 2, of uncharacterized bacterial counterparts of vertebrate, yeast and plant phospholipase D (PLD, EC 3.1.4.4). PLDs hydrolyze the terminal phosphodiester bond of phospholipids with the formation of phosphatidic acid and alcohols. They also catalyze the transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. Instead of the regulatory C2 (calcium-activated lipid binding) domain in plants and the adjacent Phox (PX) and the Pleckstrin homology (PH) N-terminal domains in most mammalian and yeast PLDs, many members in this subfamily contain a SNARE associated C-terminal domain, whose functional role is unclear. Like other PLD enzymes, members in this subfamily contain two copies of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue), that may play an important role in the catalysis. Pssm-ID: 197241 [Multi-domain] Cd Length: 142 Bit Score: 39.43 E-value: 7.77e-04
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PLDc_Nuc | cd09170 | Catalytic domain of EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar ... |
250-374 | 1.33e-03 | |||||||
Catalytic domain of EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar proteins; Catalytic domain of an EDTA-resistant nuclease Nuc from Salmonella typhimurium and similar proteins. Nuc is an endonuclease cleaving both single- and double-stranded DNA. It is the smallest known member of the phospholipase D (PLD, EC 3.1.4.4) superfamily that includes a diverse group of proteins with various catalytic functions. Most members of this superfamily have two copies of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) in a single polypeptide chain and both are required for catalytic activity. However, Nuc only has one copy of the HKD motif per subunit but form a functionally active homodimer (it is most likely also active in solution as a multimeric protein), which has a single active site at the dimer interface containing the HKD motifs from both subunits. Due to the lack of a distinct domain for DNA binding, Nuc cuts DNA non-specifically. It utilizes a two-step mechanism to cleave phosphodiester bonds: Upon substrate binding, the bond is first attacked by a histidine residue from one HKD motif to form a covalent phosphohistidine intermediate, which is then hydrolyzed by water with the aid of a second histidine residue from the other HKD motif in the opposite subunit. Pssm-ID: 197267 [Multi-domain] Cd Length: 142 Bit Score: 39.04 E-value: 1.33e-03
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PLDc_PMFPLD_like_1 | cd09108 | Catalytic domain, repeat 1, of phospholipase D from Streptomyces Sp. Strain PMF and similar ... |
123-186 | 2.76e-03 | |||||||
Catalytic domain, repeat 1, of phospholipase D from Streptomyces Sp. Strain PMF and similar proteins; Catalytic domain, repeat 1, of phospholipases D (PLD, EC 3.1.4.4) from Streptomyces Sp. Strain PMF (PMFPLD) and similar proteins, which are generally extracellular and bear N-terminal signal sequences. PMFPLD hydrolyzes the terminal phosphodiester bond of phospholipids with the formation of phosphatidic acid and alcohols. Phosphatidic acid is an essential compound involved in signal transduction. It also catalyzes a transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. In contrast to eukaryotic PLDs, PMFPLD has a compact structure, which consists of two catalytic domains, but lacks the regulatory domains. Each catalytic domain contains one copy of the HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. Two HKD motifs from two domains form a single active site. Like other PLD enzymes, PMFPLD may utilize a common two-step ping-pong catalytic mechanism involving an enzyme-substrate intermediate to cleave phosphodiester bonds. The two histidine residues from the two HKD motifs play key roles in the catalysis. Upon substrate binding, a histidine residue from one HKD motif could function as the nucleophile, attacking the phosphodiester bond to create a covalent phosphohistidine intermediate, while the other histidine residue from the second HKD motif could serve as a general acid, stabilizing the leaving group. A calcium-dependent PLD from Streptomyce chromofuscus is excluded from this family, since it displays very little sequence homology with other Streptomyces PLDs. Moreover, it does not contain the conserved HKD motif and hydrolyzes the phospholipids via a different mechanism. Pssm-ID: 197207 [Multi-domain] Cd Length: 210 Bit Score: 38.95 E-value: 2.76e-03
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PLDc_unchar4 | cd09132 | Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic ... |
44-142 | 3.25e-03 | |||||||
Putative catalytic domain of uncharacterized phospholipase D-like proteins; Putative catalytic domain of uncharacterized phospholipase D (PLD, EC 3.1.4.4)-like proteins. Members of this subfamily contain one copy of HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue) that characterizes the PLD superfamily. Pssm-ID: 197230 [Multi-domain] Cd Length: 122 Bit Score: 37.25 E-value: 3.25e-03
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PLDc_N_Snf2_like | cd09178 | N-terminal putative catalytic domain of uncharacterized HKD family nucleases fused to putative ... |
292-375 | 4.10e-03 | |||||||
N-terminal putative catalytic domain of uncharacterized HKD family nucleases fused to putative helicases from the Snf2-like family; N-terminal putative catalytic domain of uncharacterized archaeal and prokaryotic HKD family nucleases fused to putative helicases from the Snf2-like family, which belong to the DNA/RNA helicase superfamily II (SF2). Although Snf2-like family enzymes do not possess helicase activity, they contain a helicase-like region, where seven helicase-related sequence motifs are found, similar to those in DEAD/DEAH box helicases, which represent the biggest family within the SF2 superfamily. In addition to the helicase-like region, members of this family also contain an N-terminal putative catalytic domain with one copy of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue), and have been classified as members of the phospholipase D (PLD, EC 3.1.4.4) superfamily. Pssm-ID: 197275 [Multi-domain] Cd Length: 134 Bit Score: 37.15 E-value: 4.10e-03
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PLDc_vPLD1_2_like_bac_1 | cd09140 | Catalytic domain, repeat 1, of uncharacterized bacterial proteins with similarity to ... |
40-165 | 8.04e-03 | |||||||
Catalytic domain, repeat 1, of uncharacterized bacterial proteins with similarity to vertebrate phospholipases, PLD1 and PLD2; Catalytic domain, repeat 1, of uncharacterized bacterial counterparts of vertebrate, yeast and plant phospholipase D (PLD, EC 3.1.4.4). PLDs hydrolyze the terminal phosphodiester bond of phospholipids with the formation of phosphatidic acid and alcohols. They also catalyze the transphosphatidylation of phospholipids to acceptor alcohols, by which various phospholipids can be synthesized. Instead of the regulatory C2 (calcium-activated lipid binding) domain in plants and the adjacent Phox (PX) and the Pleckstrin homology (PH) N-terminal domains in most mammalian and yeast PLDs, many members in this subfamily contain a SNARE associated C-terminal domain, whose functional role is unclear. Like other PLD enzymes, members in this subfamily contain two copies of the conserved HKD motif (H-x-K-x(4)-D, where x represents any amino acid residue), that may play an important role in the catalysis. Pssm-ID: 197238 [Multi-domain] Cd Length: 146 Bit Score: 36.76 E-value: 8.04e-03
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