Structure of cyanide and camphor bound P450cam mutant L358P/K178G

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

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This is version 1.3 of the entry. See complete history


Synergistic Effects of Mutations in Cytochrome P450cam Designed To Mimic CYP101D1.

Batabyal, D.Li, H.Poulos, T.L.

(2013) Biochemistry 52: 5396-5402

  • DOI: https://doi.org/10.1021/bi400676d
  • Primary Citation of Related Structures:  
    4L49, 4L4A, 4L4B, 4L4C, 4L4D, 4L4E, 4L4F, 4L4G

  • PubMed Abstract: 

    A close orthologue to cytochrome P450cam (CYP101A1) that catalyzes the same hydroxylation of camphor to 5-exo-hydroxycamphor is CYP101D1. There are potentially important differences in and around the active site that could contribute to subtle functional differences. Adjacent to the heme iron ligand, Cys357, is Leu358 in P450cam, whereas this residue is Ala in CYP101D1. Leu358 plays a role in binding of the P450cam redox partner, putidaredoxin (Pdx). On the opposite side of the heme, about 15-20 Å away, Asp251 in P450cam plays a critical role in a proton relay network required for O2 activation but forms strong ion pairs with Arg186 and Lys178. In CYP101D1 Gly replaces Lys178. Thus, the local electrostatic environment and ion pairing are substantially different in CYP101D1. These sites have been systematically mutated in P450cam to the corresponding residues in CYP101D1 and the mutants analyzed by crystallography, kinetics, and UV-vis spectroscopy. Individually, the mutants have little effect on activity or structure, but in combination there is a major drop in enzyme activity. This loss in activity is due to the mutants being locked in the low-spin state, which prevents electron transfer from the P450cam redox partner, Pdx. These studies illustrate the strong synergistic effects on well-separated parts of the structure in controlling the equilibrium between the open (low-spin) and closed (high-spin) conformational states.

  • Organizational Affiliation

    Departments of Molecular Biology and Biochemistry, Chemistry, and Pharmaceutical Sciences, University of California, Irvine, CA 92697-3900, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Camphor 5-monooxygenase415Pseudomonas putidaMutation(s): 3 
Gene Names: camCcyp101
Find proteins for P00183 (Pseudomonas putida)
Explore P00183 
Go to UniProtKB:  P00183
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00183
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.55 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.072α = 90
b = 58.79β = 105.02
c = 57.072γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-08-28
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description
  • Version 1.3: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description