Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47173.30 
• Atom Count: 3320 
• Residue Count: 414 
• Unique protein chains: 1

3L61

Crystal structure of substrate-free P450cam at 200 mM [K+]

• DOI: 10.2210/pdb3L61/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Pseudomonas putida
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 1 


• Deposited: 2009-12-22 Released: 2010-04-21 
• Deposition Author(s): Lee, Y.-T., Wilson, R.F., Rupniewski, I., Goodin, D.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.5 Å
• R-Value Free: 0.216 
• R-Value Work: 0.197 

Literature

P450cam visits an open conformation in the absence of substrate.

Lee, Y.T., Wilson, R.F., Rupniewski, I., Goodin, D.B.

(2010) Biochemistry 49: 3412-3419

• PubMed: 20297780 
• DOI: 10.1021/bi100183g
• Primary Citation of Related Structures:  
  3L63, 3L62


• PubMed Abstract: 
  

P450cam from Pseudomonas putida is the best characterized member of the vast family of cytochrome P450s, and it has long been believed to have a more rigid and closed active site relative to other P450s. Here we report X-ray structures of P450cam crystallized in the absence of substrate and at high and low [K(+)]. The camphor-free structures are observed in a distinct open conformation characterized by a water-filled channel created by the retraction of the F and G helices, disorder of the B' helix, and loss of the K(+) binding site. Crystallization in the presence of K(+) alone does not alter the open conformation, while crystallization with camphor alone is sufficient for closure of the channel. Soaking crystals of the open conformation in excess camphor does not promote camphor binding or closure, suggesting resistance to conformational change by the crystal lattice. This open conformation is remarkably similar to that seen upon binding large tethered substrates, showing that it is not the result of a perturbation by the ligand. Redissolved crystals of the open conformation are observed as a mixture of P420 and P450 forms, which is converted to the P450 form upon addition of camphor and K(+). These data reveal that P450cam can dynamically visit an open conformation that allows access to the deeply buried active site without being induced by substrate or ligand.

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Organizational Affiliation: 

Department of Molecular Biology, 10550 North Torrey Pines Road, The Scripps Research Institute, La Jolla, California 92037, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Camphor 5-monooxygenase	A	414	Pseudomonas putida	Mutation(s): 1  Gene Names: camC (cyp101) EC: 1.14.15.1
Find proteins for P00183 (Pseudomonas putida) Go to UniProtKB:  P00183

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HEM	A	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.5 Å
• R-Value Free: 0.216 
• R-Value Work: 0.197 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 65.606	α = 90.00
b = 73.825	β = 90.00
c = 92.428	γ = 90.00

Software Package:

Software Name	Purpose
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-12-22 
• Released Date: 2010-04-21 
• Deposition Author(s): Lee, Y.-T., Wilson, R.F., Rupniewski, I., Goodin, D.B.

Revision History 

• Version 1.0: 2010-04-21
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance