PLP-dependent aminotransferase family protein may combine pyridoxal phosphate with an alpha-amino acid to form a Schiff base or aldimine intermediate, which then acts as the substrate in a reaction such as a transamination, racemization, or decarboxylation
Aspartate aminotransferase (AAT) superfamily (fold type I) of pyridoxal phosphate (PLP) ...
17-364
6.33e-90
Aspartate aminotransferase (AAT) superfamily (fold type I) of pyridoxal phosphate (PLP)-dependent enzymes. PLP combines with an alpha-amino acid to form a compound called a Schiff base or aldimine intermediate, which depending on the reaction, is the substrate in four kinds of reactions (1) transamination (movement of amino groups), (2) racemization (redistribution of enantiomers), (3) decarboxylation (removing COOH groups), and (4) various side-chain reactions depending on the enzyme involved. Pyridoxal phosphate (PLP) dependent enzymes were previously classified into alpha, beta and gamma classes, based on the chemical characteristics (carbon atom involved) of the reaction they catalyzed. The availability of several structures allowed a comprehensive analysis of the evolutionary classification of PLP dependent enzymes, and it was found that the functional classification did not always agree with the evolutionary history of these enzymes. Structure and sequence analysis has revealed that the PLP dependent enzymes can be classified into four major groups of different evolutionary origin: aspartate aminotransferase superfamily (fold type I), tryptophan synthase beta superfamily (fold type II), alanine racemase superfamily (fold type III), and D-amino acid superfamily (fold type IV) and Glycogen phophorylase family (fold type V).
The actual alignment was detected with superfamily member cd00616:
Pssm-ID: 450240 [Multi-domain] Cd Length: 352 Bit Score: 274.42 E-value: 6.33e-90
3-amino-5-hydroxybenzoic acid synthase family (AHBA_syn). AHBA_syn family belongs to pyridoxal ...
17-364
6.33e-90
3-amino-5-hydroxybenzoic acid synthase family (AHBA_syn). AHBA_syn family belongs to pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). The members of this CD are involved in various biosynthetic pathways for secondary metabolites. Some well studied proteins in this CD are AHBA_synthase, protein product of pleiotropic regulatory gene degT, Arnb aminotransferase and pilin glycosylation protein. The prototype of this family, the AHBA_synthase, is a dimeric PLP dependent enzyme. AHBA_syn is the terminal enzyme of 3-amino-5-hydroxybenzoic acid (AHBA) formation which is involved in the biosynthesis of ansamycin antibiotics, including rifamycin B. Some members of this CD are involved in 4-amino-6-deoxy-monosaccharide D-perosamine synthesis. Perosamine is an important element in the glycosylation of several cell products, such as antibiotics and lipopolysaccharides of gram-positive and gram-negative bacteria. The pilin glycosylation protein encoded by gene pglA, is a galactosyltransferase involved in pilin glycosylation. Additionally, this CD consists of ArnB (PmrH) aminotransferase, a 4-amino-4-deoxy-L-arabinose lipopolysaccharide-modifying enzyme. This CD also consists of several predicted pyridoxal phosphate-dependent enzymes apparently involved in regulation of cell wall biogenesis. The catalytic lysine which is present in all characterized PLP dependent enzymes is replaced by histidine in some members of this CD.
Pssm-ID: 99740 [Multi-domain] Cd Length: 352 Bit Score: 274.42 E-value: 6.33e-90
DegT/DnrJ/EryC1/StrS aminotransferase family; The members of this family are probably all ...
15-367
6.40e-69
DegT/DnrJ/EryC1/StrS aminotransferase family; The members of this family are probably all pyridoxal-phosphate-dependent aminotransferase enzymes with a variety of molecular functions. The family includes StsA, StsC and StsS. The aminotransferase activity was demonstrated for purified StsC protein as the L-glutamine:scyllo-inosose aminotransferase EC:2.6.1.50, which catalyzes the first amino transfer in the biosynthesis of the streptidine subunit of streptomycin.
Pssm-ID: 395827 Cd Length: 360 Bit Score: 220.62 E-value: 6.40e-69
UDP-4-amino-4,6-dideoxy-N-acetyl-beta-L-altrosamine transaminase; This family of enzymes are ...
34-364
1.79e-41
UDP-4-amino-4,6-dideoxy-N-acetyl-beta-L-altrosamine transaminase; This family of enzymes are aminotransferases of the pfam01041 family involved in the biosynthesis of pseudaminic acid. They convert UDP-4-keto-6-deoxy-N-acetylglucosamine into UDP-4-amino-4,6-dideoxy-N-acetylgalactose. Pseudaminic acid has a role in surface polysaccharide in Pseudomonas as well as in the modification of flagellin in Campylobacter and Helicobacter species.
Pssm-ID: 274662 Cd Length: 380 Bit Score: 149.40 E-value: 1.79e-41
3-amino-5-hydroxybenzoic acid synthase family (AHBA_syn). AHBA_syn family belongs to pyridoxal ...
17-364
6.33e-90
3-amino-5-hydroxybenzoic acid synthase family (AHBA_syn). AHBA_syn family belongs to pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). The members of this CD are involved in various biosynthetic pathways for secondary metabolites. Some well studied proteins in this CD are AHBA_synthase, protein product of pleiotropic regulatory gene degT, Arnb aminotransferase and pilin glycosylation protein. The prototype of this family, the AHBA_synthase, is a dimeric PLP dependent enzyme. AHBA_syn is the terminal enzyme of 3-amino-5-hydroxybenzoic acid (AHBA) formation which is involved in the biosynthesis of ansamycin antibiotics, including rifamycin B. Some members of this CD are involved in 4-amino-6-deoxy-monosaccharide D-perosamine synthesis. Perosamine is an important element in the glycosylation of several cell products, such as antibiotics and lipopolysaccharides of gram-positive and gram-negative bacteria. The pilin glycosylation protein encoded by gene pglA, is a galactosyltransferase involved in pilin glycosylation. Additionally, this CD consists of ArnB (PmrH) aminotransferase, a 4-amino-4-deoxy-L-arabinose lipopolysaccharide-modifying enzyme. This CD also consists of several predicted pyridoxal phosphate-dependent enzymes apparently involved in regulation of cell wall biogenesis. The catalytic lysine which is present in all characterized PLP dependent enzymes is replaced by histidine in some members of this CD.
Pssm-ID: 99740 [Multi-domain] Cd Length: 352 Bit Score: 274.42 E-value: 6.33e-90
DegT/DnrJ/EryC1/StrS aminotransferase family; The members of this family are probably all ...
15-367
6.40e-69
DegT/DnrJ/EryC1/StrS aminotransferase family; The members of this family are probably all pyridoxal-phosphate-dependent aminotransferase enzymes with a variety of molecular functions. The family includes StsA, StsC and StsS. The aminotransferase activity was demonstrated for purified StsC protein as the L-glutamine:scyllo-inosose aminotransferase EC:2.6.1.50, which catalyzes the first amino transfer in the biosynthesis of the streptidine subunit of streptomycin.
Pssm-ID: 395827 Cd Length: 360 Bit Score: 220.62 E-value: 6.40e-69
UDP-4-amino-4,6-dideoxy-N-acetyl-beta-L-altrosamine transaminase; This family of enzymes are ...
34-364
1.79e-41
UDP-4-amino-4,6-dideoxy-N-acetyl-beta-L-altrosamine transaminase; This family of enzymes are aminotransferases of the pfam01041 family involved in the biosynthesis of pseudaminic acid. They convert UDP-4-keto-6-deoxy-N-acetylglucosamine into UDP-4-amino-4,6-dideoxy-N-acetylgalactose. Pseudaminic acid has a role in surface polysaccharide in Pseudomonas as well as in the modification of flagellin in Campylobacter and Helicobacter species.
Pssm-ID: 274662 Cd Length: 380 Bit Score: 149.40 E-value: 1.79e-41
Aspartate aminotransferase family. This family belongs to pyridoxal phosphate (PLP)-dependent ...
13-258
5.23e-06
Aspartate aminotransferase family. This family belongs to pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). Pyridoxal phosphate combines with an alpha-amino acid to form a compound called a Schiff base or aldimine intermediate, which depending on the reaction, is the substrate in four kinds of reactions (1) transamination (movement of amino groups), (2) racemization (redistribution of enantiomers), (3) decarboxylation (removing COOH groups), and (4) various side-chain reactions depending on the enzyme involved. Pyridoxal phosphate (PLP) dependent enzymes were previously classified into alpha, beta and gamma classes, based on the chemical characteristics (carbon atom involved) of the reaction they catalyzed. The availability of several structures allowed a comprehensive analysis of the evolutionary classification of PLP dependent enzymes, and it was found that the functional classification did not always agree with the evolutionary history of these enzymes. The major groups in this CD corresponds to Aspartate aminotransferase a, b and c, Tyrosine, Alanine, Aromatic-amino-acid, Glutamine phenylpyruvate, 1-Aminocyclopropane-1-carboxylate synthase, Histidinol-phosphate, gene products of malY and cobC, Valine-pyruvate aminotransferase and Rhizopine catabolism regulatory protein.
Pssm-ID: 99734 [Multi-domain] Cd Length: 350 Bit Score: 47.72 E-value: 5.23e-06
Glycine cleavage system P-protein; This family consists of Glycine cleavage system P-proteins ...
30-198
4.93e-05
Glycine cleavage system P-protein; This family consists of Glycine cleavage system P-proteins EC:1.4.4.2 from bacterial, mammalian and plant sources. The P protein is part of the glycine decarboxylase multienzyme complex EC:2.1.2.10 (GDC) also annotated as glycine cleavage system or glycine synthase. GDC consists of four proteins P, H, L and T. The reaction catalyzed by this protein is:- Glycine + lipoylprotein <=> S-aminomethyldihydrolipoylprotein + CO2
Pssm-ID: 396772 [Multi-domain] Cd Length: 428 Bit Score: 45.06 E-value: 4.93e-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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