1GXI

PsaE Subunit of the Photosystem I of the Cyanobacterium Synechocystis sp. PCC 6803


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 14 
  • Selection Criteria: LEAST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Solution NMR Structure and Backbone Dynamics of the Psae Subunit of Photosyetm I from Synechocystis Sp. Pcc 6803

Barth, P.Savarin, P.Gilquin, B.Lagoutte, B.Ochsenbein, F.

(2002) Biochemistry 41: 13902-13914


  • PubMed Abstract: 
  • PsaE is a small peripheral subunit of photosystem I (PSI) that is very accessible to the surrounding medium. It plays an essential role in optimizing the interactions with the soluble electron acceptors of PSI, ferredoxin and flavodoxin. The solution ...

    PsaE is a small peripheral subunit of photosystem I (PSI) that is very accessible to the surrounding medium. It plays an essential role in optimizing the interactions with the soluble electron acceptors of PSI, ferredoxin and flavodoxin. The solution structure of PsaE from the cyanobacterium Synechocystis sp. PCC 6803 has been investigated by NMR with a special emphasis on its protein dynamic properties. PsaE is characterized by a well-defined central core that consists of a five-stranded beta-sheet (+1, +1, +1, -4x). Four loops (designated the A-B, B-C, C-D, and D-E loops) connect these beta-strands, the overall resulting structure being that of an SH3-like domain. As compared to previously determined PsaE structures, conformational differences are observed in the first three loops. The flexibility of the loops was investigated using (15)N relaxation experiments. This flexibility is small in amplitude for the A-B and B-C loops, but is large for the C-D loop, particularly in the region corresponding to the missing sequence of Nostoc sp. PCC 8009. The plasticity of the connecting loops in the free subunit is compared to that when bound to the PSI and discussed in relation to the insertion process and the function(s) of PsaE.


    Related Citations: 
    • The Solution Structure of Photosystem I Accessory Protein E from the Cyanobacterium Nostoc Sp. Strain Pcc 8009
      Mayer, K.L.,Shen, G.,Bryant, D.,Lecomte, J.,Falzone, C.J.
      (1999) Biochemistry 38: 13736
    • Essential Role of a Single Arginine of Photosystem I in Stabilizing the Electron Transfer Complex with Ferredoxin
      Barth, P.,Guillouard, I.,Setif, P.
      (2000) J.Biol.Chem. 275: 7030


    Organizational Affiliation

    Département de Biologie Joliot Curie, Service de Bioénergétique, CEA de Saclay and URA CNRS 2096, F-91191 Gif sur Yvette Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHOTOSYSTEM I REACTION CENTER SUBUNIT IV
E
73Synechocystis sp. (strain PCC 6803 / Kazusa)Gene Names: psaE
Find proteins for P12975 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Go to UniProtKB:  P12975
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 14 
  • Selection Criteria: LEAST ENERGY 
  • Olderado: 1GXI Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-04
    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: 2018-01-17
    Type: Database references, Structure summary