PALP domain-containing protein belonging to the tryptophan synthase beta superfamily (fold type II) that consists of pyridoxal phosphate (PLP)-dependent enzymes that catalyze beta-replacement and beta-elimination reactions
Tryptophan synthase beta superfamily (fold type II); this family of pyridoxal phosphate (PLP) ...
1-326
1.22e-84
Tryptophan synthase beta superfamily (fold type II); this family of pyridoxal phosphate (PLP)-dependent enzymes catalyzes beta-replacement and beta-elimination reactions. This CD corresponds to aminocyclopropane-1-carboxylate deaminase (ACCD), tryptophan synthase beta chain (Trp-synth_B), cystathionine beta-synthase (CBS), O-acetylserine sulfhydrylase (CS), serine dehydratase (Ser-dehyd), threonine dehydratase (Thr-dehyd), diaminopropionate ammonia lyase (DAL), and threonine synthase (Thr-synth). ACCD catalyzes the conversion of 1-aminocyclopropane-1-carboxylate to alpha-ketobutyrate and ammonia. Tryptophan synthase folds into a tetramer, where the beta chain is the catalytic PLP-binding subunit and catalyzes the formation of L-tryptophan from indole and L-serine. CBS is a tetrameric hemeprotein that catalyzes condensation of serine and homocysteine to cystathionine. CS is a homodimer that catalyzes the formation of L-cysteine from O-acetyl-L-serine. Ser-dehyd catalyzes the conversion of L- or D-serine to pyruvate and ammonia. Thr-dehyd is active as a homodimer and catalyzes the conversion of L-threonine to 2-oxobutanoate and ammonia. DAL is also a homodimer and catalyzes the alpha, beta-elimination reaction of both L- and D-alpha, beta-diaminopropionate to form pyruvate and ammonia. Thr-synth catalyzes the formation of threonine and inorganic phosphate from O-phosphohomoserine.
The actual alignment was detected with superfamily member PRK03910:
Pssm-ID: 444852 Cd Length: 331 Bit Score: 258.22 E-value: 1.22e-84
pyridoxal phosphate-dependent enzymes, D-cysteine desulfhydrase family; This model represents ...
9-322
1.78e-58
pyridoxal phosphate-dependent enzymes, D-cysteine desulfhydrase family; This model represents a family of pyridoxal phosphate-dependent enzymes closely related to (and often designated as putative examples of) 1-aminocyclopropane-1-carboxylate deaminase. It appears that members of this family include both D-cysteine desulfhydrase (EC 4.4.1.15) and 1-aminocyclopropane-1-carboxylate deaminase (EC 3.5.99.7).
Pssm-ID: 273533 [Multi-domain] Cd Length: 318 Bit Score: 190.79 E-value: 1.78e-58
Aminocyclopropane-1-carboxylate deaminase (ACCD): Pyridoxal phosphate (PLP)-dependent enzyme which catalyzes the conversion of 1-aminocyclopropane-L-carboxylate (ACC), a precursor of the plant hormone ethylene, to alpha-ketobutyrate and ammonia.
Pssm-ID: 107210 Cd Length: 307 Bit Score: 182.24 E-value: 3.14e-55
Pyridoxal-phosphate dependent enzyme; Members of this family are all pyridoxal-phosphate ...
9-314
3.79e-24
Pyridoxal-phosphate dependent enzyme; Members of this family are all pyridoxal-phosphate dependent enzymes. This family includes: serine dehydratase EC:4.2.1.13 P20132, threonine dehydratase EC:4.2.1.16, tryptophan synthase beta chain EC:4.2.1.20, threonine synthase EC:4.2.99.2, cysteine synthase EC:4.2.99.8 P11096, cystathionine beta-synthase EC:4.2.1.22, 1-aminocyclopropane-1-carboxylate deaminase EC:4.1.99.4.
Pssm-ID: 459749 [Multi-domain] Cd Length: 295 Bit Score: 99.69 E-value: 3.79e-24
pyridoxal phosphate-dependent enzymes, D-cysteine desulfhydrase family; This model represents ...
9-322
1.78e-58
pyridoxal phosphate-dependent enzymes, D-cysteine desulfhydrase family; This model represents a family of pyridoxal phosphate-dependent enzymes closely related to (and often designated as putative examples of) 1-aminocyclopropane-1-carboxylate deaminase. It appears that members of this family include both D-cysteine desulfhydrase (EC 4.4.1.15) and 1-aminocyclopropane-1-carboxylate deaminase (EC 3.5.99.7).
Pssm-ID: 273533 [Multi-domain] Cd Length: 318 Bit Score: 190.79 E-value: 1.78e-58
Aminocyclopropane-1-carboxylate deaminase (ACCD): Pyridoxal phosphate (PLP)-dependent enzyme which catalyzes the conversion of 1-aminocyclopropane-L-carboxylate (ACC), a precursor of the plant hormone ethylene, to alpha-ketobutyrate and ammonia.
Pssm-ID: 107210 Cd Length: 307 Bit Score: 182.24 E-value: 3.14e-55
Pyridoxal-phosphate dependent enzyme; Members of this family are all pyridoxal-phosphate ...
9-314
3.79e-24
Pyridoxal-phosphate dependent enzyme; Members of this family are all pyridoxal-phosphate dependent enzymes. This family includes: serine dehydratase EC:4.2.1.13 P20132, threonine dehydratase EC:4.2.1.16, tryptophan synthase beta chain EC:4.2.1.20, threonine synthase EC:4.2.99.2, cysteine synthase EC:4.2.99.8 P11096, cystathionine beta-synthase EC:4.2.1.22, 1-aminocyclopropane-1-carboxylate deaminase EC:4.1.99.4.
Pssm-ID: 459749 [Multi-domain] Cd Length: 295 Bit Score: 99.69 E-value: 3.79e-24
Tryptophan synthase beta superfamily (fold type II); this family of pyridoxal phosphate (PLP) ...
16-315
5.13e-10
Tryptophan synthase beta superfamily (fold type II); this family of pyridoxal phosphate (PLP)-dependent enzymes catalyzes beta-replacement and beta-elimination reactions. This CD corresponds to aminocyclopropane-1-carboxylate deaminase (ACCD), tryptophan synthase beta chain (Trp-synth_B), cystathionine beta-synthase (CBS), O-acetylserine sulfhydrylase (CS), serine dehydratase (Ser-dehyd), threonine dehydratase (Thr-dehyd), diaminopropionate ammonia lyase (DAL), and threonine synthase (Thr-synth). ACCD catalyzes the conversion of 1-aminocyclopropane-1-carboxylate to alpha-ketobutyrate and ammonia. Tryptophan synthase folds into a tetramer, where the beta chain is the catalytic PLP-binding subunit and catalyzes the formation of L-tryptophan from indole and L-serine. CBS is a tetrameric hemeprotein that catalyzes condensation of serine and homocysteine to cystathionine. CS is a homodimer that catalyzes the formation of L-cysteine from O-acetyl-L-serine. Ser-dehyd catalyzes the conversion of L- or D-serine to pyruvate and ammonia. Thr-dehyd is active as a homodimer and catalyzes the conversion of L-threonine to 2-oxobutanoate and ammonia. DAL is also a homodimer and catalyzes the alpha, beta-elimination reaction of both L- and D-alpha, beta-diaminopropionate to form pyruvate and ammonia. Thr-synth catalyzes the formation of threonine and inorganic phosphate from O-phosphohomoserine.
Pssm-ID: 107202 [Multi-domain] Cd Length: 244 Bit Score: 58.68 E-value: 5.13e-10
threonine synthase; Involved in threonine biosynthesis it catalyses the reaction ...
254-314
5.25e-06
threonine synthase; Involved in threonine biosynthesis it catalyses the reaction O-PHOSPHO-L-HOMOSERINE + H(2)O = L-THREONINE + ORTHOPHOSPHATE using pyridoxal phosphate as a cofactor. the enzyme is distantly related to the serine/threonine dehydratases which are also pyridoxal-phosphate dependent enzymes. the pyridoxal-phosphate binding site is a Lys (K) residues present at residue 70 of the model. [Amino acid biosynthesis, Aspartate family]
Pssm-ID: 272986 [Multi-domain] Cd Length: 327 Bit Score: 47.38 E-value: 5.25e-06
Threonine synthase is a pyridoxal phosphate (PLP) dependent enzyme that catalyses the last ...
265-314
7.55e-06
Threonine synthase is a pyridoxal phosphate (PLP) dependent enzyme that catalyses the last reaction in the synthesis of threonine from aspartate. It proceeds by converting O-phospho-L-homoserine (OPH) into threonine and inorganic phosphate. In plants, OPH is an intermediate between the methionine and threonine/isoleucine pathways. Thus threonine synthase competes for OPH with cystathionine-gamma-synthase, the first enzyme in the methionine pathway. These enzymes are in general dimers. Members of this CD, Thr-synth_1, are widely distributed in bacteria, archaea and higher plants.
Pssm-ID: 107206 [Multi-domain] Cd Length: 324 Bit Score: 46.82 E-value: 7.55e-06
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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