MetaCyc Reaction:

Superclasses: Reactions Classified By Conversion Type Simple Reactions Chemical Reactions Protein-Modification Reactions
Reactions Classified By Substrate Macromolecule Reactions Protein-Reactions Protein-Modification Reactions

EC Number:

Enzymes and Genes:

Escherichia coli K-12 substr. MG1655 : 3-oxoacyl-[acyl-carrier-protein] reductase : fabG
Mycobacterium tuberculosis H37Rv : 3-oxoacyl-[acyl-carrier-protein] reductase : fabG1

In Pathway: mycolate biosynthesis

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.

Direct generic reaction:
a (3R)-3-hydroxyacyl-[acyl-carrier protein] + NADP+ ← a 3-oxoacyl-[acp] + NADPH + H+ (

Enzyme Commission Primary Name: 3-oxoacyl-[acyl-carrier-protein] reductase

Enzyme Commission Synonyms: 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

Standard Gibbs Free Energy (ΔrG in kcal/mol): 20.375793 Inferred by computational analysis [Latendresse13]

Enzyme Commission Summary:
Exhibits a marked preference for acyl-carrier-protein derivatives over CoA derivatives as substrates.

Citations: [Prescott72, Shimakata82, Toomey66]

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

Instance reaction of [a (3R)-3-hydroxyacyl-[acyl-carrier protein] + NADP+ ← a 3-oxoacyl-[acp] + NADPH + H+] (
i1: a cis-delta5-3-hydroxyC24:1-[acp] + NADP+ ← a cis-delta5-3-oxo-C24:1-[acp] + NADPH + H+ (

Relationship Links: BRENDA:EC: , ENZYME:EC: , IUBMB-ExplorEnz:EC:


Latendresse13: Latendresse M. (2013). "Computing Gibbs Free Energy of Compounds and Reactions in MetaCyc."

Prescott72: Prescott DJ, Vagelos PR (1972). "Acyl carrier protein." Adv Enzymol Relat Areas Mol Biol 36;269-311. PMID: 4561013

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

Toomey66: 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

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by SRI International Pathway Tools version 19.0 on Mon May 4, 2015, biocyc14.