4c9o

Structure of Cyanide and Camphor bound D259N mutant of CYP101D1

spinqualitylabelsall models 4c9o, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4c9o is a 2 chain structure with sequence from Atcc 700278. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CAM, CYN, HEM Related: 4c9k, 4c9l, 4c9m, 4c9n, 4c9p Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Although CYP101D1 and P450cam catalyze the same reaction at similar rates and share strikingly similar active site architectures, there are significant functional differences. CYP101D1 thus provides an opportunity to probe what structural and functional features must be shared and what features can differ but maintain the high catalytic efficiency. Crystal structures of the cyanide complex of wild-type CYP101D1 and it active site mutants, D259N and T260A, have been determined. The conformational changes in CYP101D1 upon cyanide binding are very similar to those of P450cam, indicating a similar mechanism for proton delivery during oxygen activation using solvent-assisted proton transfer. The D259N-CN- complex shows a perturbed solvent structure compared to that of the wild type, which is similar to what was observed in the oxy complex of the corresonding D251N mutant in P450cam. As in P450cam, the T260A mutant is highly uncoupled while the D259N mutant gives barely detectable activity. Despite these similarities, CYP101D1 is able to use the P450cam redox partners while P450cam cannot use the CYP101D1 redox partners. Thus, the strict requirement of P450cam for its own redox partner is relaxed in CYP101D1. Differences in the local environment of the essential Asp (Asp259 in CYP101D1) provide a strucutral basis for understanding these functional differences. Crystal Structures and Functional Characterization of Wild-Type CYP101D1 and Its Active Site Mutants.,Batabyal D, Poulos TL Biochemistry. 2013 Nov 27. PMID:24261604 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cytochrome P450 3D structures

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