Homocitrate synthase

From Wikipedia, the free encyclopedia
Jump to: navigation, search
homocitrate synthase
EC number
CAS number 9075-60-9
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / QuickGO

In enzymology, a homocitrate synthase (EC is an enzyme that catalyzes the chemical reaction

acetyl-CoA + H2O + 2-oxoglutarate (R)-2-hydroxybutane-1,2,4-tricarboxylate + CoA

The 3 substrates of this enzyme are acetyl-CoA, H2O, and 2-oxoglutarate, whereas its two products are (R)-2-hydroxybutane-1,2,4-tricarboxylate and CoA.

This enzyme belongs to the family of transferases, specifically those acyltransferases that convert acyl groups into alkyl groups on transfer. The systematic name of this enzyme class is acetyl-CoA:2-oxoglutarate C-acetyltransferase (thioester-hydrolysing, carboxymethyl forming). Other names in common use include 2-hydroxybutane-1,2,4-tricarboxylate 2-oxoglutarate-lyase, (CoA-acetylating), acetyl-coenzyme A:2-ketoglutarate C-acetyl transferase, and homocitrate synthetase. This enzyme participates in lysine biosynthesis and pyruvate metabolism.


  • Strassman M, Ceci LN (1964). "Enzymatic formation of homocitric acid, an intermediate in lysine biosynthesis". Biochem. Biophys. Res. Commun. 14 (3): 262–7. doi:10.1016/0006-291X(64)90446-2. PMID 5836514. 
  • H; Miyazaki, J; Kobashi, N; Nishiyama, M; Hoshino, T; Yamane, H (2002). "Characterization of bacterial homocitrate synthase involved in lysine biosynthesis". FEBS Lett. 522 (1–3): 35–40. doi:10.1016/S0014-5793(02)02877-6. PMID 12095615. 
  • Andi B, West AH, Cook PF (2004). "Kinetic mechanism of histidine-tagged homocitrate synthase from Saccharomyces cerevisiae". Biochemistry. 43 (37): 11790–5. doi:10.1021/bi048766p. PMID 15362863.