Escherichia coli K-12 substr. MG1655 Reaction:

Superclasses: Reactions Classified By Conversion Type Simple Reactions Chemical Reactions
Reactions Classified By Substrate Small-Molecule Reactions

EC Number:

Enzymes and Genes:
ornithine carbamoyltransferase chain F Inferred from experiment : argF
ornithine carbamoyltransferase chain I Inferred from experiment : argI

In Pathway: L-arginine biosynthesis I (via L-ornithine)

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: ornithine carbamoyltransferase

Enzyme Commission Synonyms: citrulline phosphorylase, ornithine transcarbamylase, OTC, carbamylphosphate-ornithine transcarbamylase, L-ornithine carbamoyltransferase, L-ornithine carbamyltransferase, L-ornithine transcarbamylase, ornithine carbamyltransferase

This is the sixth step in arginine biosynthesis. It is also part of the urea cycle.

Enzyme Commission Summary:
The plant enzyme also catalyses the reactions of EC putrescine carbamoyltransferase, EC carbamate kinase and EC agmatine deiminase, thus acting as putrescine synthase, converting agmatine [(4-aminobutyl)guanidine] and ornithine into putrescine and citrulline, respectively.

Citations: [Bishop67, Marshall72, Marshall72a, Marshall72b]

Gene-Reaction Schematic: ?

Gene-Reaction Schematic

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


Bishop67: Bishop SH, Grisolia S (1967). "Crystalline ornithine transcarbamylase." Biochim Biophys Acta 139(2);344-8. PMID: 6034676

Marshall72: Marshall M, Cohen PP (1972). "Ornithine transcarbamylase from Streptococcus faecalis and bovine liver. I. Isolation and subunit structure." J Biol Chem 247(6);1641-53. PMID: 4622303

Marshall72a: Marshall M, Cohen PP (1972). "Ornithine transcarbamylase from Streptococcus faecalis and bovine liver. II. Multiple binding sites for carbamyl-P and L-norvaline, correlation with steady state kinetics." J Biol Chem 247(6);1654-68. PMID: 4622304

Marshall72b: Marshall M, Cohen PP (1972). "Ornithine transcarbamylase from Streptococcus faecalis and bovine liver. 3. Effects of chemical modifications of specific residues on ligand binding and enzymatic activity." J Biol Chem 247(6);1669-82. PMID: 4622305

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of EcoCyc: Nucleic Acids Research 41:D605-12 2013
Page generated by SRI International Pathway Tools version 19.0 on Fri Oct 9, 2015, BIOCYC14B.