Adenosylcobyric acid synthase (glutamine-hydrolysing)

In enzymology, an adenosylcobyric acid synthase (glutamine-hydrolysing) (EC 6.3.5.10) is an enzyme that catalyzes the chemical reaction

4 ATP + adenosylcobyrinic acid a,c-diamide + 4 L-glutamine + 4 H2O 4 ADP + 4 phosphate + adenosylcobyric acid + 4 L-glutamate
adenosylcobyric acid synthase (glutamine-hydrolyzing)
Identifiers
EC number6.3.5.10
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

The four substrates of this enzyme are ATP, adenosylcobyrinic acid a,c-diamide, L-glutamine, and H2O; its four products are ADP, phosphate, adenosylcobyric acid, 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 (Glutamine amidotransferases). The systematic name of this enzyme class is adenosylcobyrinic-acid-a,c-diamide:L-glutamine amido-ligase (ADP-forming). Other names in common use include CobQ, cobyric acid synthase, 5'-deoxy-5'-adenosylcobyrinic-acid-a,c-diamide:L-glutamine, amido-ligase, and Ado-cobyric acid synthase [glutamine hydrolyzing]. This enzyme is part of the biosynthetic pathway to cobalamin (vitamin B12) in bacteria.

See also

References
    • Blanche F, Couder M, Debussche L, Thibaut D, Cameron B, Crouzet J (1991). "Biosynthesis of vitamin B12: stepwise amidation of carboxyl groups b, d, e, and g of cobyrinic acid a,c-diamide is catalyzed by one enzyme in Pseudomonas denitrificans". J. Bacteriol. 173 (19): 6046–51. PMC 208350. PMID 1917839.
    • 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.


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