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Information on EC 1.2.1.95 - L-2-aminoadipate reductase

for references in articles please use BRENDA:EC1.2.1.95

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IUBMB Comments

This enzyme, characterized from the yeast Saccharomyces cerevisiae, catalyses the reduction of L-2-aminoadipate to (S)-2-amino-6-oxohexanoate during L-lysine biosynthesis. An adenylation domain activates the substrate at the expense of ATP hydrolysis, and forms L-2-aminoadipate adenylate, which is attached to a peptidyl-carrier protein (PCP) domain. Binding of NADPH results in reductive cleavage of the acyl-S-enzyme intermediate, releasing (S)-2-amino-6-oxohexanoate. Different from EC 1.2.1.31, L-aminoadipate-semialdehyde dehydrogenase, which catalyses a similar transformation in the opposite direction without ATP hydrolysis.

The enzyme appears in viruses and cellular organisms
Reaction Schemes
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Synonyms
alpha-aminoadipate reductase, lys1+, alpha-aminoadipate delta-semialdehyde synthase, more

REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
(S)-2-amino-6-oxohexanoate + holo-[LYS2 peptidyl-carrier-protein] + NADP+ = L-2-aminoadipyl-[LYS2 peptidyl-carrier-protein] + NADPH + H+
show the reaction diagram
(1b)
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(S)-2-amino-6-oxohexanoate + NADP+ + AMP + diphosphate = L-2-aminoadipate + NADPH + H+ + ATP
show the reaction diagram
overall reaction
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L-2-aminoadipyl-[LYS2 peptidyl-carrier-protein] + AMP + diphosphate = L-2-aminoadipate + holo-[LYS2 peptidyl-carrier-protein] + ATP
show the reaction diagram
(1a)
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