1QN2

cytochrome cH from Methylobacterium extorquens


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Molecular Structure of an Unusual Cytochrome C2 Determined at 2.0A; the Cytochrome cH from Methylobacterium Extorquens

Read, J.Gill, R.Dales, S.L.Cooper, J.B.Wood, S.P.Anthony, C.

(1999) Protein Sci. 8: 1232

  • DOI: 10.1110/ps.8.6.1232

  • PubMed Abstract: 
  • Cytochrome cH is the electron donor to the oxidase in methylotrophic bacteria. Its amino acid sequence suggests that it is a typical Class 1 cytochrome c, but some features of the sequence indicated that its structure might be of special interest. Th ...

    Cytochrome cH is the electron donor to the oxidase in methylotrophic bacteria. Its amino acid sequence suggests that it is a typical Class 1 cytochrome c, but some features of the sequence indicated that its structure might be of special interest. The structure of oxidized cytochrome cH has been solved to 2.0 A resolution by X-ray diffraction. It has the classical tertiary structure of the Class 1 cytochromes c but bears a closer gross resemblance to mitochondrial cytochrome c than to the bacterial cytochrome c2. The left-hand side of the haem cleft is unique; in particular, it is highly hydrophobic, the usual water is absent, and the "conserved" Tyr67 is replaced by tryptophan. A number of features of the structure demonstrate that the usual hydrogen bonding network involving water in the haem channel is not essential and that other mechanisms may exist for modulation of redox potentials in this cytochrome.


    Organizational Affiliation

    Division of Biochemistry and Molecular Biology, School of Biological Sciences, University of Southampton, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME CH
A, B, C
100Methylobacterium extorquensMutation(s): 0 
Find proteins for Q7SIA4 (Methylobacterium extorquens)
Go to UniProtKB:  Q7SIA4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEC
Query on HEC

Download SDF File 
Download CCD File 
A, B, C
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.161 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 33.760α = 67.81
b = 57.570β = 89.33
c = 50.950γ = 74.40
Software Package:
Software NamePurpose
CCP4refinement
Agrovatadata scaling
SCALAdata scaling
CCP4phasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-05-30
    Type: Data collection, Database references