Optical detection of cytochrome P450 by sensitizer-linked substrates

Experimental Data Snapshot

  • Resolution: 1.55 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

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This is version 2.1 of the entry. See complete history


Optical Detection of Cytochrome P450 by Sensitizer-Linked Substrates

Dmochowski, I.J.Crane, B.R.Wilker, J.J.Winkler, J.R.Gray, H.B.

(1999) Proc Natl Acad Sci U S A 96: 12987

  • DOI: https://doi.org/10.1073/pnas.96.23.12987
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The ability to detect, characterize, and manipulate specific biomolecules in complex media is critical for understanding metabolic processes. Particularly important targets are oxygenases (cytochromes P450) involved in drug metabolism and many disease states, including liver and kidney dysfunction, neurological disorders, and cancer. We have found that Ru photosensitizers linked to P450 substrates specifically recognize submicromolar cytochrome P450(cam) in the presence of other heme proteins. In the P450:Ru-substrate conjugates, energy transfer to the heme dramatically accelerates the Ru-luminescence decay. The crystal structure of a P450(cam):Ru-adamantyl complex reveals access to the active center via a channel whose depth (Ru-Fe distance is 21 A) is virtually the same as that extracted from an analysis of the energy-transfer kinetics. Suitably constructed libraries of sensitizer-linked substrates could be employed to probe the steric and electronic properties of buried active sites.

  • Organizational Affiliation

    Beckman Institute, California Institute of Technology, Pasadena, CA 91125, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CYTOCHROME P450414Pseudomonas putidaMutation(s): 1 
Gene Names: CYP101
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: 0.226 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.39α = 90
b = 74.47β = 90
c = 91.73γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-10-06
    Type: Initial release
  • Version 1.1: 2012-03-28
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
  • Version 2.0: 2018-10-03
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Refinement description