1C6S

THE SOLUTION STRUCTURE OF CYTOCHROME C6 FROM THE THERMOPHILIC CYANOBACTERIUM SYNECHOCOCCUS ELONGATUS, NMR, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY, AGREEMENT WITH EXPERIMENTAL DATA 

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This is version 1.2 of the entry. See complete history

Literature

Solution structure of cytochrome c6 from the thermophilic cyanobacterium Synechococcus elongatus.

Beissinger, M.Sticht, H.Sutter, M.Ejchart, A.Haehnel, W.Rosch, P.

(1998) EMBO J. 17: 27-36

  • DOI: 10.1093/emboj/17.1.27

  • PubMed Abstract: 
  • Cytochrome c6 is a small, soluble electron carrier between the two membrane-bound complexes cytochrome b6f and photosystem I (PSI) in oxygenic photosynthesis. We determined the solution structure of cytochrome c6 from the thermophilic cyanobacterium ...

    Cytochrome c6 is a small, soluble electron carrier between the two membrane-bound complexes cytochrome b6f and photosystem I (PSI) in oxygenic photosynthesis. We determined the solution structure of cytochrome c6 from the thermophilic cyanobacterium Synechococcus elongatus by NMR spectroscopy and molecular dynamics calculations based on 1586 interresidual distance and 28 dihedral angle restraints. The overall fold exhibits four alpha-helices and a small antiparallel beta-sheet in the vicinity of Met58, one of the axial heme ligands. The flat hydrophobic area in this cytochrome c6 is conserved in other c6 cytochromes and even in plastocyanin of higher plants. This docking region includes the site of electron transfer to PSI and possibly to the cytochrome b6f complex. The binding of cytochrome c6 to PSI in green algae involves interaction of a negative patch with a positive domain of PSI. This positive domain has not been inserted at the evolutionary level of cyanobacteria, but the negatively charged surface region is already present in S. elongatus cytochrome c6 and may thus have been optimized during evolution to improve the interaction with the positively charged cytochrome f. As the structure of PSI is known in S.elongatus, the reported cytochrome c6 structure can provide a basis for mutagenesis studies to delineate the mechanism of electron transfer between both.


    Related Citations: 
    • Cytochrome C6 from the Thermophilic Synechococcus Elongatus
      Sutter, M.,Sticht, H.,Schmid, R.,Hoerth, P.,Roesch, P.,Haehnel, W.
      (1995) Photosynthesis : From Light to Biosphere : Proceedings of the Xth International Photosynthesis Congress, Montpellier, France, 20-25 August 1995 2: 563


    Organizational Affiliation

    Lehrstuhl für Biopolymere, Universität Bayreuth, D-95440 Bayreuth.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME C6
A
87Synechococcus elongatusGene Names: petJ
Find proteins for P0A3Y0 (Synechococcus elongatus)
Go to UniProtKB:  P0A3Y0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEC
Query on HEC

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

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY, AGREEMENT WITH EXPERIMENTAL DATA 
  • Olderado: 1C6S Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-04-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance