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) ...
3-396
2.64e-128
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 TIGR01976:
Pssm-ID: 450240 [Multi-domain] Cd Length: 397 Bit Score: 374.86 E-value: 2.64e-128
cysteine desulfurase family protein, VC1184 subfamily; This model describes a subfamily of ...
3-396
2.64e-128
cysteine desulfurase family protein, VC1184 subfamily; This model describes a subfamily of probable pyridoxal phosphate-dependent enzymes in the aminotransferase class V family (pfam00266). The most closely related characterized proteins are active as cysteine desulfurases, selenocysteine lyases, or both; some are involved in FeS cofactor biosynthesis and are designated NifS. An active site Cys residue present in those sequences, in motifs resembling GHHC or GSAC, is not found in this family. The function of members of this family is unknown, but seems unlike to be as an aminotransferase. [Unknown function, Enzymes of unknown specificity]
Pssm-ID: 273906 [Multi-domain] Cd Length: 397 Bit Score: 374.86 E-value: 2.64e-128
Cysteine desulfurase (SufS)-like. This family belongs to the pyridoxal phosphate (PLP) ...
20-396
2.01e-39
Cysteine desulfurase (SufS)-like. This family belongs to the pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). The major groups in this CD correspond to cysteine desulfurase (SufS) and selenocysteine lyase. SufS catalyzes the removal of elemental sulfur and selenium atoms from L-cysteine, L-cystine, L-selenocysteine, and L-selenocystine to produce L-alanine; and selenocysteine lyase catalyzes the decomposition of L-selenocysteine.
Pssm-ID: 99746 [Multi-domain] Cd Length: 373 Bit Score: 144.53 E-value: 2.01e-39
cysteine desulfurase family protein, VC1184 subfamily; This model describes a subfamily of ...
3-396
2.64e-128
cysteine desulfurase family protein, VC1184 subfamily; This model describes a subfamily of probable pyridoxal phosphate-dependent enzymes in the aminotransferase class V family (pfam00266). The most closely related characterized proteins are active as cysteine desulfurases, selenocysteine lyases, or both; some are involved in FeS cofactor biosynthesis and are designated NifS. An active site Cys residue present in those sequences, in motifs resembling GHHC or GSAC, is not found in this family. The function of members of this family is unknown, but seems unlike to be as an aminotransferase. [Unknown function, Enzymes of unknown specificity]
Pssm-ID: 273906 [Multi-domain] Cd Length: 397 Bit Score: 374.86 E-value: 2.64e-128
Cysteine desulfurase (SufS)-like. This family belongs to the pyridoxal phosphate (PLP) ...
20-396
2.01e-39
Cysteine desulfurase (SufS)-like. This family belongs to the pyridoxal phosphate (PLP)-dependent aspartate aminotransferase superfamily (fold I). The major groups in this CD correspond to cysteine desulfurase (SufS) and selenocysteine lyase. SufS catalyzes the removal of elemental sulfur and selenium atoms from L-cysteine, L-cystine, L-selenocysteine, and L-selenocystine to produce L-alanine; and selenocysteine lyase catalyzes the decomposition of L-selenocysteine.
Pssm-ID: 99746 [Multi-domain] Cd Length: 373 Bit Score: 144.53 E-value: 2.01e-39
CGS_like: Cystathionine gamma-synthase is a PLP dependent enzyme and catalyzes the committed ...
124-213
2.28e-03
CGS_like: Cystathionine gamma-synthase is a PLP dependent enzyme and catalyzes the committed step of methionine biosynthesis. This pathway is unique to microorganisms and plants, rendering the enzyme an attractive target for the development of antimicrobials and herbicides. This subgroup also includes cystathionine gamma-lyases (CGL), O-acetylhomoserine sulfhydrylases and O-acetylhomoserine thiol lyases. CGL's are very similar to CGS's. Members of this group are widely distributed among all three forms of life.
Pssm-ID: 99738 [Multi-domain] Cd Length: 369 Bit Score: 39.88 E-value: 2.28e-03
Cys/Met metabolism PLP-dependent enzyme; This family includes enzymes involved in cysteine and ...
26-256
9.22e-03
Cys/Met metabolism PLP-dependent enzyme; This family includes enzymes involved in cysteine and methionine metabolism. The following are members: Cystathionine gamma-lyase, Cystathionine gamma-synthase, Cystathionine beta-lyase, Methionine gamma-lyase, OAH/OAS sulfhydrylase, O-succinylhomoserine sulfhydrylase All of these members participate is slightly different reactions. All these enzymes use PLP (pyridoxal-5'-phosphate) as a cofactor.
Pssm-ID: 395837 [Multi-domain] Cd Length: 376 Bit Score: 37.98 E-value: 9.22e-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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