1GKS

ECTOTHIORHODOSPIRA HALOPHILA CYTOCHROME C551 (REDUCED), NMR, 37 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 37 
  • Selection Criteria: PHYSICAL AND EXPERIMENTAL ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Ectothiorhodospira halophila ferrocytochrome c551: solution structure and comparison with bacterial cytochromes c.

Bersch, B.Blackledge, M.J.Meyer, T.E.Marion, D.

(1996) J.Mol.Biol. 264: 567-584

  • DOI: 10.1006/jmbi.1996.0662

  • PubMed Abstract: 
  • The solution structure of the Ectothiorhodospira halophila ferrocytochrome c551 has been determined. This molecule belongs to a separate class of small bacterial cytochromes c for which no 3D structure has been reported so far. It is characterized by ...

    The solution structure of the Ectothiorhodospira halophila ferrocytochrome c551 has been determined. This molecule belongs to a separate class of small bacterial cytochromes c for which no 3D structure has been reported so far. It is characterized by a very low redox potential (58 mV) and is isolated from the periplasm of halophilic purple phototrophic bacteria. For the 78 residue protein, 1445 NOE derived distance constraints were used in a combined simulated annealing/restrained molecular dynamics calculation. The final ensemble of 37 structures presents a backbone r.m.s.d. of less than 0.5 A compared to the mean structure. The physical viability of these structures was investigated by subjecting eight of them to a constraint free molecular dynamics simulation. No systematic conformational change was observed and the average backbone r.m.s.d. compared to the initial structures was less than 1.5 A. The structure of the E. halophila cytochrome c551 shows a striking resemblance to Azotobacter vinelandii cytochrome c5. Significant differences in backbone conformations occur in three small regions which are implicated in solvent protection of the heme propionates and thiomethyl-8(1). Comparison with Pseudomonas aeruginosa cytochrome c551 reveals that only the common cytochrome c core, i.e. three helices, is conserved. The folding of the protein chain around the heme propionates is very different and results in more efficient solvent protection in Ps. aeruginosa. The electrostatic surface of E. halophila cytochrome c551 was found to be significantly different from mitochondrial cytochromes c and bacterial cytochromes c2 but similar to that of Ps. aeruginosa cytochrome c551.


    Related Citations: 
    • Isolation and Characterization of Soluble Cytochromes, Ferredoxins and Other Chromophoric Proteins from the Halophilic Phototrophic Bacterium Ectothiorhodospira Halophila
      Meyer, T.E.
      (1985) Biochim.Biophys.Acta 806: 175
    • Amino Acid Sequences of Cytochromes C-551 from the Halophilic Purple Phototrophic Bacteria, Ectothiorhodospira Halophila and E. Halochloris
      Ambler, R.P.,Meyer, T.E.,Kamen, M.D.
      (1993) Arch.Biochem.Biophys. 306: 83
    • 1H and 13C NMR Assignments and Structural Aspects of a Ferrocytochrome C-551 from the Purple Phototrophic Bacterium Ectothiorhodospira Halophila
      Bersch, B.,Brutscher, B.,Meyer, T.E.,Marion, D.
      (1995) Eur.J.Biochem. 227: 249


    Organizational Affiliation

    Institut de Biologie Structurale-Jean-Pierre Ebel, CEA-CNRS, Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME C551
A
78Halorhodospira halophilaN/A
Find proteins for P00122 (Halorhodospira halophila)
Go to UniProtKB:  P00122
Small Molecules
Ligands 1 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
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 37 
  • Selection Criteria: PHYSICAL AND EXPERIMENTAL ENERGY 
  • Olderado: 1GKS Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-01-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance