type III PLP (pyridoxal 5-phosphate)-dependent enzyme domain-containing protein, similar to alanine racemase which catalyzes the interconversion of L-alanine and D-alanine
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes; The fold type III PLP-dependent enzyme ...
46-221
1.84e-124
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes; The fold type III PLP-dependent enzyme family is predominantly composed of two-domain proteins with similarity to bacterial alanine racemases (AR) including eukaryotic ornithine decarboxylases (ODC), prokaryotic diaminopimelate decarboxylases (DapDC), biosynthetic arginine decarboxylases (ADC), carboxynorspermidine decarboxylases (CANSDC), and similar proteins. AR-like proteins contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain. They exist as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. These proteins play important roles in the biosynthesis of amino acids and polyamine. The family also includes the single-domain YBL036c-like proteins, which contain a single PLP-binding TIM-barrel domain without any N- or C-terminal extensions. Due to the lack of a second domain, these proteins may possess only limited D- to L-alanine racemase activity or non-specific racemase activity.
The actual alignment was detected with superfamily member PLN02439:
Pssm-ID: 469695 [Multi-domain] Cd Length: 559 Bit Score: 363.24 E-value: 1.84e-124
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Arginine Decarboxylase; This subfamily ...
41-221
2.70e-93
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Arginine Decarboxylase; This subfamily includes plants and biosynthetic prokaryotic arginine decarboxylases (ADC, EC 4.1.1.19). ADC is involved in the biosynthesis of putrescine, which is the precursor of aliphatic polyamines in many organisms. It catalyzes the decarboxylation of L-arginine to agmatine, which is then hydrolyzed to putrescine by agmatinase. ADC is homologous to eukaryotic ornithine decarboxylase (ODC) and diaminopimelate decarboxylase (DapDC), which are fold type III PLP-dependent enzymes that contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain, similar to bacterial alanine racemases. Homodimer formation and the presence of both PLP and Mg2+ cofactors may be required for catalytic activity. Prokaryotic ADCs (biodegradative), which are fold type I PLP-dependent enzymes, are not included in this family.
Pssm-ID: 143503 [Multi-domain] Cd Length: 409 Bit Score: 278.68 E-value: 2.70e-93
Pyridoxal-dependent decarboxylase, pyridoxal binding domain; These pyridoxal-dependent ...
81-219
1.73e-10
Pyridoxal-dependent decarboxylase, pyridoxal binding domain; These pyridoxal-dependent decarboxylases acting on ornithine, lysine, arginine and related substrates This domain has a TIM barrel fold.
Pssm-ID: 397077 [Multi-domain] Cd Length: 241 Bit Score: 58.83 E-value: 1.73e-10
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Arginine Decarboxylase; This subfamily ...
41-221
2.70e-93
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Arginine Decarboxylase; This subfamily includes plants and biosynthetic prokaryotic arginine decarboxylases (ADC, EC 4.1.1.19). ADC is involved in the biosynthesis of putrescine, which is the precursor of aliphatic polyamines in many organisms. It catalyzes the decarboxylation of L-arginine to agmatine, which is then hydrolyzed to putrescine by agmatinase. ADC is homologous to eukaryotic ornithine decarboxylase (ODC) and diaminopimelate decarboxylase (DapDC), which are fold type III PLP-dependent enzymes that contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain, similar to bacterial alanine racemases. Homodimer formation and the presence of both PLP and Mg2+ cofactors may be required for catalytic activity. Prokaryotic ADCs (biodegradative), which are fold type I PLP-dependent enzymes, are not included in this family.
Pssm-ID: 143503 [Multi-domain] Cd Length: 409 Bit Score: 278.68 E-value: 2.70e-93
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes, Ornithine and Diaminopimelate ...
45-222
4.39e-21
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzymes, Ornithine and Diaminopimelate Decarboxylases, and Related Enzymes; This family includes eukaryotic ornithine decarboxylase (ODC, EC 4.1.1.17), diaminopimelate decarboxylase (DapDC, EC 4.1.1.20), plant and prokaryotic biosynthetic arginine decarboxylase (ADC, EC 4.1.1.19), carboxynorspermidine decarboxylase (CANSDC), and ODC-like enzymes from diverse bacterial species. These proteins are fold type III PLP-dependent enzymes that catalyze essential steps in the biosynthesis of polyamine and lysine. ODC and ADC participate in alternative pathways of the biosynthesis of putrescine, which is the precursor of aliphatic polyamines in many organisms. ODC catalyzes the direct synthesis of putrescine from L-ornithine, while ADC converts L-arginine to agmatine, which is hydrolysed to putrescine by agmatinase in a pathway that exists only in plants and bacteria. DapDC converts meso-2,6-diaminoheptanedioate to L-lysine, which is the final step of lysine biosynthesis. CANSDC catalyzes the decarboxylation of carboxynorspermidine, which is the last step in the synthesis of norspermidine. The PLP-dependent decarboxylases in this family contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain, similar to bacterial alanine racemases. They exist as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. Prokaryotic ornithine, lysine and biodegradative arginine decarboxylases are fold type I PLP-dependent enzymes and are not included in this family.
Pssm-ID: 143485 [Multi-domain] Cd Length: 368 Bit Score: 89.67 E-value: 4.39e-21
Pyridoxal-dependent decarboxylase, pyridoxal binding domain; These pyridoxal-dependent ...
81-219
1.73e-10
Pyridoxal-dependent decarboxylase, pyridoxal binding domain; These pyridoxal-dependent decarboxylases acting on ornithine, lysine, arginine and related substrates This domain has a TIM barrel fold.
Pssm-ID: 397077 [Multi-domain] Cd Length: 241 Bit Score: 58.83 E-value: 1.73e-10
Pyridoxal-dependent decarboxylase, C-terminal sheet domain; These pyridoxal-dependent ...
52-221
5.81e-09
Pyridoxal-dependent decarboxylase, C-terminal sheet domain; These pyridoxal-dependent decarboxylases act on ornithine, lysine, arginine and related substrates.
Pssm-ID: 459745 [Multi-domain] Cd Length: 340 Bit Score: 55.19 E-value: 5.81e-09
Diaminopimelate decarboxylase [Amino acid transport and metabolism]; Diaminopimelate ...
45-222
2.53e-07
Diaminopimelate decarboxylase [Amino acid transport and metabolism]; Diaminopimelate decarboxylase is part of the Pathway/BioSystem: Lysine biosynthesis
Pssm-ID: 439790 [Multi-domain] Cd Length: 417 Bit Score: 50.15 E-value: 2.53e-07
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Diaminopimelate Decarboxylase; ...
45-222
6.91e-07
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Diaminopimelate Decarboxylase; Diaminopimelate decarboxylase (DapDC, EC 4.1.1.20) participates in the last step of lysine biosynthesis. It converts meso-2,6-diaminoheptanedioate to L-lysine. It is a fold type III PLP-dependent enzyme that contains an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain, similar to bacterial alanine racemases. DapDC exists as homodimers with active sites that lie at the interface between the TIM barrel domain of one subunit and the beta-sandwich domain of the other subunit. Homodimer formation and the presence of the PLP cofactor are required for catalytic activity.
Pssm-ID: 143501 [Multi-domain] Cd Length: 373 Bit Score: 49.02 E-value: 6.91e-07
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Y4yA; This subfamily is composed of the ...
45-222
6.32e-05
Type III Pyridoxal 5-phosphate (PLP)-Dependent Enzyme Y4yA; This subfamily is composed of the hypothetical Rhizobium sp. protein Y4yA and similar uncharacterized bacterial proteins. These proteins are homologous to eukaryotic ornithine decarboxylase (ODC) and diaminopimelate decarboxylase (DapDC). ODC and DapDC are fold type III PLP-dependent enzymes that contain an N-terminal PLP-binding TIM-barrel domain and a C-terminal beta-sandwich domain, similar to bacterial alanine racemases. ODC participates in the formation of putrescine by catalyzing the decarboxylation of ornithine, the first step in polyamine biosynthesis. DapDC participates in the last step of lysine biosynthesis, the conversion of meso-2,6-diaminoheptanedioate to L-lysine. Proteins in this subfamily may function as PLP-dependent decarboxylases.
Pssm-ID: 143509 [Multi-domain] Cd Length: 423 Bit Score: 43.02 E-value: 6.32e-05
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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