3cpp

CRYSTAL STRUCTURE OF THE CARBON MONOXY-SUBSTRATE-CYTOCHROME P450-CAM TERNARY COMPLEX

spinqualitylabelsall models 3cpp, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3cpp is a 1 chain structure with sequence from Pseudomonas putida. The October 2006 RCSB PDB Molecule of the Month feature on Cytochrome p450 by David S. Goodsell is 10.2210/rcsb_pdb/mom_2006_10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: CAM, CMO, HEM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CPXA_PSEPU Involved in a camphor oxidation system. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The crystal structure of the ternary complex formed between carbon monoxide (CO), camphor, and ferrous cytochrome P-450CAM has been refined to an R value of 17.9% at 1.9-A resolution. To accommodate the CO molecule, the substrate, camphor, moves about 0.8 A while at the same time remaining in nonbonded contact with CO. The average temperature factor of the camphor atoms is about 50% higher in the CO complex, suggesting that the camphor is more loosely bound in this ternary complex. The Fe-C-O angle is about 166 degrees, and thus, CO appears to be bent from the heme normal, as it is in various CO-globin complexes, due to steric interactions with active site groups. The oxygen atom of the CO molecule is nestled into a groove formed by an unusual helical hydrogen bond in the distal helix between the highly conserved Thr 252 and Gly 248 residues. In the transition from the ferric camphor-bound binary complex to the ferrous CO-camphor-bound ternary complex, the heme iron atom moves into the plane defined by the pyrrole nitrogens by about 0.41 A. Although the axial Cys ligand also moves toward the heme, the S-Fe bond stretches from about 2.20 A in the absence of CO to about 2.41 A once CO has bound. Crystal structure of the carbon monoxide-substrate-cytochrome P-450CAM ternary complex.,Raag R, Poulos TL Biochemistry. 1989 Sep 19;28(19):7586-92. PMID:2611203 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cytochrome P450 3D structures

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