Glycosyltransferase family 20; Members of this family belong to glycosyl transferase family 20. ...
63-554
0e+00
Glycosyltransferase family 20; Members of this family belong to glycosyl transferase family 20. OtsA (Trehalose-6-phosphate synthase) is homologous to regions in the subunits of yeast trehalose-6-phosphate synthase/phosphate complex,.
Pssm-ID: 425972 [Multi-domain] Cd Length: 471 Bit Score: 652.42 E-value: 0e+00
trehalose-6-phosphate synthase; Trehalose-6-Phosphate Synthase (TPS, EC 2.4.1.15) is a ...
63-553
0e+00
trehalose-6-phosphate synthase; Trehalose-6-Phosphate Synthase (TPS, EC 2.4.1.15) is a glycosyltransferase that catalyses the synthesis of alpha,alpha-1,1-trehalose-6-phosphate from glucose-6-phosphate using a UDP-glucose donor. It is a key enzyme in the trehalose synthesis pathway. Trehalose is a nonreducing disaccharide present in a wide variety of organisms and may serve as a source of energy and carbon. It is characterized most notably in insect, plant, and microbial cells. Its production is often associated with a variety of stress conditions, including desiccation, dehydration, heat, cold, and oxidation. This family represents the catalytic domain of the TPS. Some members of this domain family coexist with a C-terminal trehalose phosphatase domain.
Pssm-ID: 340820 [Multi-domain] Cd Length: 463 Bit Score: 600.34 E-value: 0e+00
alpha,alpha-trehalose-phosphate synthase [UDP-forming]; This enzyme catalyzes the key, ...
63-554
1.83e-137
alpha,alpha-trehalose-phosphate synthase [UDP-forming]; This enzyme catalyzes the key, penultimate step in biosynthesis of trehalose, a compatible solute made as an osmoprotectant in some species in all three domains of life. The gene symbol OtsA stands for osmotically regulated trehalose synthesis A. Trehalose helps protect against both osmotic and thermal stresses, and is made from two glucose subunits. This model excludes glucosylglycerol-phosphate synthase, an enzyme of an analogous osmoprotectant system in many cyanobacterial strains. This model does not identify archaeal examples, as they are more divergent than glucosylglycerol-phosphate synthase. Sequences that score in the gray zone between the trusted and noise cutoffs include a number of yeast multidomain proteins in which the N-terminal domain may be functionally equivalent to this family. The gray zone also includes the OtsA of Cornyebacterium glutamicum (and related species), shown to be responsible for synthesis of only trace amounts of trehalose while the majority is synthesized by the TreYZ pathway; the significance of OtsA in this species is unclear (see Wolf, et al., ). [Cellular processes, Adaptations to atypical conditions]
Pssm-ID: 274112 Cd Length: 456 Bit Score: 416.29 E-value: 1.83e-137
Glycosyltransferase family 20; Members of this family belong to glycosyl transferase family 20. ...
63-554
0e+00
Glycosyltransferase family 20; Members of this family belong to glycosyl transferase family 20. OtsA (Trehalose-6-phosphate synthase) is homologous to regions in the subunits of yeast trehalose-6-phosphate synthase/phosphate complex,.
Pssm-ID: 425972 [Multi-domain] Cd Length: 471 Bit Score: 652.42 E-value: 0e+00
trehalose-6-phosphate synthase; Trehalose-6-Phosphate Synthase (TPS, EC 2.4.1.15) is a ...
63-553
0e+00
trehalose-6-phosphate synthase; Trehalose-6-Phosphate Synthase (TPS, EC 2.4.1.15) is a glycosyltransferase that catalyses the synthesis of alpha,alpha-1,1-trehalose-6-phosphate from glucose-6-phosphate using a UDP-glucose donor. It is a key enzyme in the trehalose synthesis pathway. Trehalose is a nonreducing disaccharide present in a wide variety of organisms and may serve as a source of energy and carbon. It is characterized most notably in insect, plant, and microbial cells. Its production is often associated with a variety of stress conditions, including desiccation, dehydration, heat, cold, and oxidation. This family represents the catalytic domain of the TPS. Some members of this domain family coexist with a C-terminal trehalose phosphatase domain.
Pssm-ID: 340820 [Multi-domain] Cd Length: 463 Bit Score: 600.34 E-value: 0e+00
alpha,alpha-trehalose-phosphate synthase [UDP-forming]; This enzyme catalyzes the key, ...
63-554
1.83e-137
alpha,alpha-trehalose-phosphate synthase [UDP-forming]; This enzyme catalyzes the key, penultimate step in biosynthesis of trehalose, a compatible solute made as an osmoprotectant in some species in all three domains of life. The gene symbol OtsA stands for osmotically regulated trehalose synthesis A. Trehalose helps protect against both osmotic and thermal stresses, and is made from two glucose subunits. This model excludes glucosylglycerol-phosphate synthase, an enzyme of an analogous osmoprotectant system in many cyanobacterial strains. This model does not identify archaeal examples, as they are more divergent than glucosylglycerol-phosphate synthase. Sequences that score in the gray zone between the trusted and noise cutoffs include a number of yeast multidomain proteins in which the N-terminal domain may be functionally equivalent to this family. The gray zone also includes the OtsA of Cornyebacterium glutamicum (and related species), shown to be responsible for synthesis of only trace amounts of trehalose while the majority is synthesized by the TreYZ pathway; the significance of OtsA in this species is unclear (see Wolf, et al., ). [Cellular processes, Adaptations to atypical conditions]
Pssm-ID: 274112 Cd Length: 456 Bit Score: 416.29 E-value: 1.83e-137
Trehalose-phosphatase; This family consist of trehalose-phosphatases EC:3.1.3.12 these enzyme ...
603-837
4.84e-88
Trehalose-phosphatase; This family consist of trehalose-phosphatases EC:3.1.3.12 these enzyme catalyze the de-phosphorylation of trehalose-6-phosphate to trehalose and orthophosphate. The aligned region is present in trehalose-phosphatases and comprises the entire length of the protein it is also found in the C-terminus of trehalose-6-phosphate synthase EC:2.4.1.15 adjacent to the trehalose-6-phosphate synthase domain - pfam00982. It would appear that the two equivalent genes in the E. coli otsBA operon otsA the trehalose-6-phosphate synthase and otsB trehalose-phosphatase (this family) have undergone gene fusion in most eukaryotes and Swiss:P93653. Trehalose is a common disaccharide of bacteria, fungi and invertebrates that appears to play a major role in desiccation tolerance.
Pssm-ID: 426737 [Multi-domain] Cd Length: 234 Bit Score: 279.22 E-value: 4.84e-88
trehalose-phosphate phosphatase similar to Escherichia coli trehalose-6-phosphate phosphatase ...
601-842
1.17e-65
trehalose-phosphate phosphatase similar to Escherichia coli trehalose-6-phosphate phosphatase OtsB and Saccharomyces cerevisiae trehalose-phosphatase TPS2; Trehalose biosynthesis in bacteria is known through three pathways - OtsAB, TreYZ and TreS. The OtsAB pathway, also known as the trehalose 6-phosphate synthase (TSP)/ Trehalose-6-phosphate phosphatase (TPP) pathway, is the most common route known to be involved in the stress response of Escherichia coli. It involves converting glucose-6-phosphate and UDP-glucose to form trehalose-6-phosphate (T6P), catalyzed by TPS, the product of the otsA gene, this step is followed by the dephosphorylation of T6P to yield trehalose and inorganic phosphate, catalyzed by a specific TPP, the product of otsB gene. This OtsAB (or TSP/TPP) pathway, is also the most common route known to be involved in the stress response of yeast In Saccharomyces cerevisiae, the corresponding enzymes, TPS1p and TPS2p, form a multimeric synthase complex together with additional regulatory subunits encoded by Tsl1 and Tps3. Trehalose is a common disaccharide accumulated by organisms as a reservation of carbohydrate and in response to unfavorable growth conditions. This family belongs to the haloacid dehalogenase-like (HAD) hydrolases, a large superfamily of diverse enzymes that catalyze carbon or phosphoryl group transfer reactions on a range of substrates, using an active site aspartate in nucleophilic catalysis. Members of this superfamily include 2-L-haloalkanoic acid dehalogenase, azetidine hydrolase, phosphonoacetaldehyde hydrolase, phosphoserine phosphatase, phosphomannomutase, P-type ATPases and many others. HAD hydrolases are found in all three kingdoms of life, and most genomes are predicted to contain multiple HAD-like proteins. Members possess a highly conserved alpha/beta core domain, and many also possess a small cap domain, the fold and function of which is variable. HAD hydrolases are sometimes referred to as belonging to the DDDD superfamily of phosphohydrolases.
Pssm-ID: 319767 [Multi-domain] Cd Length: 228 Bit Score: 219.08 E-value: 1.17e-65
trehalose-phosphatase; Trehalose, a neutral disaccharide of two glucose residues, is an ...
598-848
1.05e-25
trehalose-phosphatase; Trehalose, a neutral disaccharide of two glucose residues, is an important osmolyte for dessication and/or salt tolerance in a number of prokaryotic and eukaryotic species, including E. coli, Saccharomyces cerevisiae, and Arabidopsis thaliana. Many bacteria also utilize trehalose in the synthesis of trehalolipids, specialized cell wall constituents believed to be involved in the uptake of hydrophobic substances. Trehalose dimycolate (TDM, cord factor) and related substances are important constituents of the mycobacterial waxy coat and responsible for various clinically important immunological interactions with host organism. This enzyme, trehalose-phosphatase, removes a phosphate group in the final step of trehalose biosynthesis. The trehalose-phosphatase from Saccharomyces cerevisiae is fused to the synthase. At least 18 distinct sequences from Arabidopsis have been identified, roughly half of these are of the fungal type, with a fused synthase and half are like the bacterial members having only the phosphatase domain. It has been suggested that trehalose is being used in Arabidopsis as a regulatory molecule in development and possibly other processes. [Cellular processes, Adaptations to atypical conditions]
Pssm-ID: 273219 [Multi-domain] Cd Length: 244 Bit Score: 106.84 E-value: 1.05e-25
HAD-superfamily hydrolase, subfamily IIB; This subfamily falls within the Haloacid ...
601-808
4.80e-18
HAD-superfamily hydrolase, subfamily IIB; This subfamily falls within the Haloacid Dehalogenase (HAD) superfamily of aspartate-nucleophile hydrolases. The Class II subfamilies are characterized by a domain that is located between the second and third conserved catalytic motifs of the superfamily domain. The IIB subfamily is distinguished from the IIA subfamily (TIGR01460) by homology and the predicted secondary structure of this domain by PSI-PRED. The IIB subfamily's Class II domain has the following predicted structure: Helix-Sheet-Sheet-(Helix or Sheet)-Helix-Sheet-(variable)-Helix-Sheet-Sheet. The IIB subfamily consists of Trehalose-6-phosphatase (TIGR00685), plant and cyanobacterial Sucrose-phosphatase and a closely related group of bacterial and archaeal sequences, eukaryotic phosphomannomutase (pfam03332), a large subfamily ("Cof-like hydrolases", TIGR00099) containing many closely related bacterial sequences, a hypothetical equivalog containing the E. coli YedP protein, as well as two small clusters containing OMNI|TC0379 and OMNI|SA2196 whose relationship to the other groups is unclear. [Unknown function, Enzymes of unknown specificity]
Pssm-ID: 273651 [Multi-domain] Cd Length: 207 Bit Score: 83.58 E-value: 4.80e-18
Cof subfamily of IIB subfamily of haloacid dehalogenase superfamily; This subfamily of ...
601-808
2.24e-05
Cof subfamily of IIB subfamily of haloacid dehalogenase superfamily; This subfamily of sequences falls within the Class-IIB subfamily (TIGR01484) of the Haloacid Dehalogenase superfamily of aspartate-nucleophile hydrolases. The use of the name "Cof" as an identifier here is arbitrary and refers to the E. coli Cof protein. This subfamily is notable for the large number of recent paralogs in many species. Listeria, for instance, has 12, Clostridium, Lactococcus and Streptococcus pneumoniae have 8 each, Enterococcus and Salmonella have 7 each, and Bacillus subtilus, Mycoplasma, Staphylococcus and E. coli have 6 each. This high degree of gene duplication is limited to the gamma proteobacteria and low-GC gram positive lineages. The profusion of genes in this subfamily is not coupled with a high degree of divergence, so it is impossible to determine an accurate phylogeny at the equivalog level. Considering the relationship of this subfamily to the other known members of the HAD-IIB subfamily (TIGR01484), sucrose and trehalose phosphatases and phosphomannomutase, it seems a reasonable hypothesis that these enzymes act on phosphorylated sugars. Possibly the diversification of genes in this subfamily represents the diverse sugars and polysaccharides that various bacteria find in their biological niches. The members of this subfamily are restricted almost exclusively to bacteria (one sequences from S. pombe scores above trusted, while another is between trusted and noise). It is notable that no archaea are found in this group, the closest relations to the archaea found here being two Deinococcus sequences. [Unknown function, Enzymes of unknown specificity]
Pssm-ID: 272905 [Multi-domain] Cd Length: 256 Bit Score: 46.88 E-value: 2.24e-05
sucrose-phosphate phosphatase subfamily; This model includes both the members of the SPP ...
732-848
3.13e-03
sucrose-phosphate phosphatase subfamily; This model includes both the members of the SPP equivalog model (TIGR01485), encompassing plants and cyanobacteria, as well as those archaeal sequences which are the closest relatives (TIGR01487). It remains to be shown whether these archaeal sequences catalyze the same reaction as SPP.
Pssm-ID: 273650 [Multi-domain] Cd Length: 225 Bit Score: 40.14 E-value: 3.13e-03
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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