|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions → Protein-Modification Reactions|
|Reactions Classified By Substrate → Macromolecule Reactions → Protein-Reactions → Protein-Modification Reactions|
Enzymes and Genes:
|Arabidopsis thaliana col :||3-oxoacyl-[acyl-carrier-protein] reductase, chloroplastic
|Escherichia coli K-12 substr. MG1655 :||3-oxoacyl-[acyl-carrier-protein] reductase
|Homo sapiens :||fatty acid synthase
|Mycobacterium tuberculosis H37Rv :||fatty acid synthase
|Pseudomonas aeruginosa :||NADPH-dependent β-ketoacyl reductase
|Saccharomyces cerevisiae :||fatty acid synthase, α subunit
Note that this reaction equation differs from the official Enzyme Commission reaction equation for this EC number, which can be found here .
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the Enzyme Commission system.
Most BioCyc compounds have been protonated to a reference pH value of 7.3, and some reactions have been computationally balanced for hydrogen by adding free protons. Please see the PGDB Concepts Guide for more information.
Mass balance status: Balanced.
Enzyme Commission Primary Name for 18.104.22.168: 3-oxoacyl-[acyl-carrier-protein] reductase
Enzyme Commission Synonyms for 22.214.171.124: β-ketoacyl-[acyl-carrier protein](ACP) reductase, β-ketoacyl acyl carrier protein (ACP) reductase, β-ketoacyl reductase, β-ketoacyl thioester reductase, β-ketoacyl-ACP reductase, β-ketoacyl-acyl carrier protein reductase, 3-ketoacyl acyl carrier protein reductase, NADPH-specific 3-oxoacyl-[acylcarrier protein]reductase, 3-oxoacyl-[ACP]reductase, (3R)-3-hydroxyacyl-[acyl-carrier-protein]:NADP+ oxidoreductase
Enzyme Commission Primary Name for 126.96.36.199: fatty-acid synthase
Enzyme Commission Synonyms for 188.8.131.52: FASN (gene name)
Enzyme Commission Primary Name for 184.108.40.206: fatty-acyl-CoA synthase
Enzyme Commission Synonyms for 220.127.116.11: yeast fatty acid synthase, FAS1 (gene name), FAS2 (gene name)
Standard Gibbs Free Energy (ΔrG'° in kcal/mol): 20.375793 [Latendresse13]
Enzyme Commission Summary for 18.104.22.168:
Exhibits a marked preference for acyl-carrier-protein derivatives over CoA derivatives as substrates.
Enzyme Commission Summary for 22.214.171.124:
The animal enzyme is a multi-functional protein catalysing the reactions of EC 126.96.36.199, [acyl-carrier-protein] S-acetyltransferase, EC 188.8.131.52, [acyl-carrier-protein] S-malonyltransferase, EC 184.108.40.206, β-ketoacyl-[acyl-carrier-protein] synthase I, EC 220.127.116.11, 3-oxoacyl-[acyl-carrier-protein] reductase, EC 18.104.22.168, 3-hydroxyacyl-[acyl-carrier-protein] dehydratase, EC 22.214.171.124, enoyl-[acyl-carrier-protein] reductase (NADPH, Re-specific) and EC 126.96.36.199, oleoyl-[acyl-carrier-protein] hydrolase. cf. EC 188.8.131.52, fatty-acyl-CoA synthase.
Enzyme Commission Summary for 184.108.40.206:
The enzyme from yeasts (Ascomycota and Basidiomycota) is a multi-functional protein complex composed of two subunits. One subunit catalyses the reactions EC 220.127.116.11, 3-oxoacyl-[acyl-carrier-protein] reductase and EC 18.104.22.168, β-ketoacyl-[acyl-carrier-protein] synthase I, while the other subunit catalyses the reactions of EC 22.214.171.124, [acyl-carrier-protein] S-acetyltransferase, EC 126.96.36.199, [acyl-carrier-protein] S-malonyltransferase, EC 188.8.131.52, 3-hydroxyacyl-[acyl-carrier-protein] dehydratase, EC 184.108.40.206, enoyl-[acyl-carrier-protein] reductase (NADPH, Si-specific) and EC 220.127.116.119, (R)-3-hydroxyacid-ester dehydrogenase. The enzyme differs from the animal enzyme (EC 18.104.22.168) in that the enoyl reductase domain requires FMN as a cofactor, and the ultimate product is an acyl-CoA (usually palmitoyl-CoA) instead of a free fatty acid.
Instance reaction of [a (3R)-3-hydroxyacyl-[acyl-carrier protein] + NADP+ ← a 3-oxoacyl-[acp] + NADPH + H+] (22.214.171.124/126.96.36.199/188.8.131.52):
i1: a (3R)-3-hydroxyoctanoyl-[acp] + NADP+ ← a 3-oxo-octanoyl-[acp] + NADPH + H+ (184.108.40.206/220.127.116.11/18.104.22.168)
Relationship Links: BRENDA:EC:22.214.171.124 , BRENDA:EC:126.96.36.199 , BRENDA:EC:188.8.131.52 , ENZYME:EC:184.108.40.206 , ENZYME:EC:220.127.116.11 , ENZYME:EC:18.104.22.168 , IUBMB-ExplorEnz:EC:22.214.171.124 , IUBMB-ExplorEnz:EC:126.96.36.199 , IUBMB-ExplorEnz:EC:188.8.131.52
Shimakata82: Shimakata T, Stumpf PK (1982). "Purification and characterizations of beta-Ketoacyl-[acyl-carrier-protein] reductase, beta-hydroxyacyl-[acyl-carrier-protein] dehydrase, and enoyl-[acyl-carrier-protein] reductase from Spinacia oleracea leaves." Arch Biochem Biophys 218(1);77-91. PMID: 6756317
Stoops79: Stoops JK, Ross P, Arslanian MJ, Aune KC, Wakil SJ, Oliver RM (1979). "Physicochemical studies of the rat liver and adipose fatty acid synthetases." J Biol Chem 254(15);7418-26. PMID: 457689
Toomey66a: Toomey RE, Wakil SJ (1966). "Studies on the mechanism of fatty acid synthesis. XV. Preparation and general properties of beta-ketoacyl acyl carrier protein reductase from Escherichia coli." Biochim Biophys Acta 116(2);189-97. PMID: 4381013
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