Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Dihydrodipicolinate reductase; Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate (HTPA) to tetrahydrodipicolinate. Can use both NADH and NADPH as a reductant, with NADH being twice as effective as NADPH. Belongs to the DapB family.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

2,3,4,5-tetrahydropyridine-2-carboxylate N-succinyltransferase; Protein involved in lysine biosynthetic process via diaminopimelate; Belongs to the transferase hexapeptide repeat family.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Diaminopimelate epimerase; Involved in the succinylase branch of the L-lysine biosynthesis and in the biosynthesis of the pentapeptide incorporated in the peptidoglycan moiety. Catalyzes the stereoinversion of LL-2,6-diaminoheptanedioate (L,L-DAP) to meso- diaminoheptanedioate (meso-DAP).

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Imidazoleglycerolphosphate dehydratase and histidinol-phosphate phosphatase; Protein involved in histidine biosynthetic process.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Phosphoribosyl-amp cyclohydrolase; phosphoribosyl-ATP pyrophosphatase; Protein involved in histidine biosynthetic process; In the C-terminal section; belongs to the PRA-PH family.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Ketol-acid reductoisomerase, NAD(P)-binding; Involved in the biosynthesis of branched-chain amino acids (BCAA). Catalyzes an alkyl-migration followed by a ketol-acid reduction of (S)-2-acetolactate (S2AL) to yield (R)-2,3-dihydroxy-isovalerate. In the isomerase reaction, S2AL is rearranged via a Mg-dependent methyl migration to produce 3-hydroxy-3-methyl-2-ketobutyrate (HMKB). In the reductase reaction, this 2-ketoacid undergoes a metal-dependent reduction by NADPH to yield (R)-2,3-dihydroxy-isovalerate. Also able to use 2-ketopantoate, 2-ketoisovalerate, 2-ketovalerate, 2-ketobutyrate [...]

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

3-isopropylmalate dehydrogenase, NAD(+)-dependent; Catalyzes the oxidation of 3-carboxy-2-hydroxy-4- methylpentanoate (3-isopropylmalate) to 3-carboxy-4-methyl-2- oxopentanoate. The product decarboxylates to 4-methyl-2 oxopentanoate. Belongs to the isocitrate and isopropylmalate dehydrogenases family. LeuB type 1 subfamily.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Diaminopimelate decarboxylase, PLP-binding; Specifically catalyzes the decarboxylation of meso- diaminopimelate (meso-DAP) to L-lysine. Is not active against the DD- or LL-isomers of diaminopimelate; Belongs to the Orn/Lys/Arg decarboxylase class-II family. LysA subfamily.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Lysine-sensitive aspartokinase 3; Aspartokinase III, lysine sensitive; Protein involved in lysine biosynthetic process via diaminopimelate and homoserine biosynthetic process.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

D-3-phosphoglycerate dehydrogenase; Catalyzes the reversible oxidation of 3-phospho-D-glycerate to 3-phosphonooxypyruvate, the first step of the phosphorylated L- serine biosynthesis pathway. Also catalyzes the reversible oxidation of 2-hydroxyglutarate to 2-oxoglutarate.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

3-phosphoserine/phosphohydroxythreonine aminotransferase; Catalyzes the reversible conversion of 3- phosphohydroxypyruvate to phosphoserine and of 3-hydroxy-2-oxo-4- phosphonooxybutanoate to phosphohydroxythreonine. Is involved in both pyridoxine and serine biosynthesis; Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. SerC subfamily.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Bifunctional: aspartokinase I (N-terminal); homoserine dehydrogenase I (C-terminal); Protein involved in threonine biosynthetic process, methionine biosynthetic process and homoserine biosynthetic process.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Homoserine kinase; Catalyzes the ATP-dependent phosphorylation of L-homoserine to L-homoserine phosphate. Is also able to phosphorylate the hydroxy group on gamma-carbon of L-homoserine analogs when the functional group at the alpha-position is a carboxyl, an ester, or even a hydroxymethyl group. Neither L-threonine nor L-serine are substrates of the enzyme.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

L-threonine synthase; Catalyzes the gamma-elimination of phosphate from L- phosphohomoserine and the beta-addition of water to produce L- threonine. To a lesser extent, is able to slowly catalyze the deamination of L-threonine into alpha-ketobutyrate and that of L-serine and 3-chloroalanine into pyruvate. Is also able to rapidly convert vinylglycine to threonine, which proves that the pyridoxal p-quinonoid of vinylglycine is an intermediate in the TS reaction.

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

Aspartate-semialdehyde dehydrogenase, NAD(P)-binding; Catalyzes the NADPH-dependent formation of L-aspartate- semialdehyde (L-ASA) by the reductive dephosphorylation of L-aspartyl- 4-phosphate.

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

Dihydrodipicolinate reductase; Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate (HTPA) to tetrahydrodipicolinate. Can use both NADH and NADPH as a reductant, with NADH being twice as effective as NADPH. Belongs to the DapB family.

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

2,3,4,5-tetrahydropyridine-2-carboxylate N-succinyltransferase; Protein involved in lysine biosynthetic process via diaminopimelate; Belongs to the transferase hexapeptide repeat family.

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

Diaminopimelate epimerase; Involved in the succinylase branch of the L-lysine biosynthesis and in the biosynthesis of the pentapeptide incorporated in the peptidoglycan moiety. Catalyzes the stereoinversion of LL-2,6-diaminoheptanedioate (L,L-DAP) to meso- diaminoheptanedioate (meso-DAP).

Dihydrodipicolinate synthase; Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA). Belongs to the DapA family.

Ketol-acid reductoisomerase, NAD(P)-binding; Involved in the biosynthesis of branched-chain amino acids (BCAA). Catalyzes an alkyl-migration followed by a ketol-acid reduction of (S)-2-acetolactate (S2AL) to yield (R)-2,3-dihydroxy-isovalerate. In the isomerase reaction, S2AL is rearranged via a Mg-dependent methyl migration to produce 3-hydroxy-3-methyl-2-ketobutyrate (HMKB). In the reductase reaction, this 2-ketoacid undergoes a metal-dependent reduction by NADPH to yield (R)-2,3-dihydroxy-isovalerate. Also able to use 2-ketopantoate, 2-ketoisovalerate, 2-ketovalerate, 2-ketobutyrate [...]