Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 47500.85 
• Atom Count: 3263 
• Residue Count: 415 
• Unique protein chains: 1

1GEB

X-RAY CRYSTAL STRUCTURE AND CATALYTIC PROPERTIES OF THR252ILE MUTANT OF CYTOCHROME P450CAM

• DOI: 10.2210/pdb1GEB/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Pseudomonas putida
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2000-11-01 Released: 2000-11-15 
• Deposition Author(s): Hishiki, T., Shimada, H., Nagano, S., Park, S.-Y., Ishimura, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.03 Å
• R-Value Free: 0.228 
• R-Value Work: 0.187 

Literature

X-ray crystal structure and catalytic properties of Thr252Ile mutant of cytochrome P450cam: roles of Thr252 and water in the active center

Hishiki, T., Shimada, H., Nagano, S., Egawa, T., Kanamori, Y., Makino, R., Park, S.-Y., Adachi, S., Shiro, Y., Ishimura, Y.

(2000) J.Biochem.(Tokyo) 128: 965-974

• PubMed: 11098139 


• PubMed Abstract: 
  

The structure-function relationship in cytochrome P450cam monooxygenase was studied by employing its active site mutant Thr252Ile. X-ray crystallographic analyses of the ferric d-camphor-bound form of the mutant revealed that the mutation caused a structural change in the active site giving an enlarged oxygen-binding pocket that did not contain any hydrophilic group such as the OH group of Thr and H(2)O. The enzyme showed a low monooxygenase activity of ca. 1/10 of the activity of the wild-type enzyme. Kinetic analyses of each catalytic step revealed that the rate of proton-coupled reduction of the oxygenated intermediate of the enzyme, a ternary complex of dioxygen and d-camphor with the ferrous enzyme, decreased to about 1/30 of that of the wild-type enzyme, while the rates of other catalytic steps including the reduction of the ferric d-camphor-bound form by reduced putidaredoxin did not change significantly. These results indicated that a hydrophilic group(s) such as water and/or hydroxyl group in the active site is prerequisite to a proton supply for the reduction of the oxygenated intermediate, thereby giving support for the operation of a proton transfer network composed of Thr252, Asp251, and two other amino acids and water proposed by previous investigators.

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Organizational Affiliation: 

Department of Biochemistry, School of Medicine, Keio University, Shinano-machi, Shinjuku-ku, Tokyo 160-8582, Japan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CYTOCHROME P450-CAM	A	415	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 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CAM	A	CAMPHOR C10 H16 O DSSYKIVIOFKYAU-XCBNKYQSSA-N
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: 2.03 Å
• R-Value Free: 0.228 
• R-Value Work: 0.187 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 106.430	α = 90.00
b = 103.440	β = 90.00
c = 35.000	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	refinement
CCP4	data scaling
MOSFLM	data reduction
SCALA	data scaling
X-PLOR	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-11-01 
• Released Date: 2000-11-15 
• Deposition Author(s): Hishiki, T., Shimada, H., Nagano, S., Park, S.-Y., Ishimura, Y.

Revision History 

• Version 1.0: 2000-11-15
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance