In enzymology, a hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolysing) (EC 6.3.5.9) is an enzyme that catalyzes the chemical reaction
| Hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolysing) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 6.3.5.9 | ||||||||
| CAS no. | 132053-22-6 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
- 2 ATP + hydrogenobyrinic acid + 2 L-glutamine + 2 H2O 2 ADP + 2 phosphate + hydrogenobyrinic acid a,c-diamide + 2 L-glutamate
The four substrates of this enzyme are ATP, hydrogenobyrinic acid, L-glutamine, and H2O; its four products are ADP, phosphate, hydrogenobyrinic acid a,c-diamide, and L-glutamate.
This enzyme belongs to the family of ligases, specifically those forming carbon-nitrogen bonds carbon-nitrogen ligases with glutamine as amido-N-donor. The systematic name of this enzyme class is hydrogenobyrinic-acid:L-glutamine amido-ligase (AMP-forming). This enzyme is also called CobB and is part of the biosynthetic pathway to cobalamin (vitamin B12) in aerobic bacteria.
See also
editReferences
edit- Debussche L, Thibaut D, Cameron B, Crouzet J, Blanche F (1990). "Purification and characterization of cobyrinic acid a,c-diamide synthase from Pseudomonas denitrificans". J. Bacteriol. 172 (11): 6239–44. PMC 526805. PMID 2172209.
- Warren MJ, Raux E, Schubert HL, Escalante-Semerena JC (2002). "The biosynthesis of adenosylcobalamin (vitamin B12)". Nat. Prod. Rep. 19 (4): 390–412. doi:10.1039/b108967f. PMID 12195810.
