1n2n | pdb_00001n2n
Crystal structure of cyanide complex of the oxygenase domain of inducible nitric oxide synthase.
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| 1n2n, resolution 2.4Å | |||||||||||||
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| Ligands: | CYN, ZN, HEM, H4B and ARG | ||||||||||||
| Activity: | Nitric-oxide synthase, with EC number 1.14.13.39 | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
Overview
The crystal structure of the ternary cyanide complex of P450cam and camphor was determined to 1.8A resolution and found to be identical with the structure of the active oxygen complex [I. Schlichting et al., 2000, Science 287, 1615]. Notably, cyanide binds in a bent mode and induces the active conformation that is characterized by the presence of two water molecules and a flip of the carbonyl of the conserved Asp251. The structure of the ternary complex of cyanide, L-arginine, and the oxygenase domain of inducible nitric oxide synthase was determined to 2.4A resolution. Cyanide binds essentially linearly, interacts with L-Arg, and induces the binding of a water molecule at the active site. This water is positioned by backbone interactions, located 2.8A from the nitrogen atom of cyanide, and could provide a proton required for O-O bond scission in the hydroxylation reaction of nitric oxide synthase.
About this Structure
1N2N is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
Crystal structures of cyanide complexes of P450cam and the oxygenase domain of inducible nitric oxide synthase-structural models of the short-lived oxygen complexes., Fedorov R, Ghosh DK, Schlichting I, Arch Biochem Biophys. 2003 Jan 1;409(1):25-31. PMID:12464241
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