1CYI

CYTOCHROME C6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The structure of chloroplast cytochrome c6 at 1.9 A resolution: evidence for functional oligomerization.

Kerfeld, C.A.Anwar, H.P.Interrante, R.Merchant, S.Yeates, T.O.

(1995) J.Mol.Biol. 250: 627-647

  • DOI: 10.1006/jmbi.1995.0404
  • Primary Citation of Related Structures:  1CYJ

  • PubMed Abstract: 
  • The molecular structure of cytochrome c6 from the green alga Chlamydomonas reinhardtii has been determined from two crystal forms and refined to 1.9 A resolution. The two crystal forms are likely the result of different levels of post-translational m ...

    The molecular structure of cytochrome c6 from the green alga Chlamydomonas reinhardtii has been determined from two crystal forms and refined to 1.9 A resolution. The two crystal forms are likely the result of different levels of post-translational modification of the protein. This is the first report of a high-resolution structure of a chloroplast-derived class I c-type cytochrome. The overall fold is similar to that of other class I c-type cytochromes, consisting of a series of alpha-helices and turns that envelop the heme prosthetic group. There is also a short two-stranded anti-parallel beta-sheet in the vicinity of the methionine axial ligand to the heme; this region of the molecule is formed by the most highly conserved residues in c6-type cytochromes. Although class I c-type cytochromes are assumed to function as monomers, both crystal forms of cytochrome c6 exhibit oligomerization about the heme crevice that is, in part, mediated by the short anti-parallel beta-sheet. The functional significance of this oligomerization is supported by the appearance of similar interfaces in other electron transfer couples, HPLC and light-scattering data, and is furthermore consistent with kinetic data on electron transfer reactions of c6-type cytochromes.


    Related Citations: 
    • Isolation and Structural Characterization of the Chlamydomonas Reinhardtii Gene for Cytochrome C6
      Hill, K.L.,Li, H.H.,Singer, J.,Merchant, S.
      (1991) J.Biol.Chem. 266: 15060


    Organizational Affiliation

    Molecular Biology Institute, University of California, Los Angeles 90024-1570, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME C6
A
90Chlamydomonas reinhardtiiGene Names: petJ
Find proteins for P08197 (Chlamydomonas reinhardtii)
Go to UniProtKB:  P08197
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.197 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 82.600α = 90.00
b = 82.600β = 90.00
c = 82.600γ = 90.00
Software Package:
Software NamePurpose
R-AXISdata reduction
MSCdata reduction
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-01-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model