1NZE

Crystal structure of PsbQ polypeptide of photosystem II from higher plants


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the PsbQ protein of photosystem II from higher plants

Calderone, V.Trabucco, M.Vujicic, A.Battistutta, R.Giacometti, G.M.Andreucci, F.Barbato, R.Zanotti, G.

(2003) Embo Rep. 4: 900-905

  • DOI: 10.1038/sj.embor.embor923

  • PubMed Abstract: 
  • The smallest extrinsic polypeptide of the water-oxidizing complex (PsbQ) was extracted and purified from spinach (Spinacia oleracea) photosystem II (PSII) membranes. It was then crystallized in the presence of Zn(2+) and its structure was determined ...

    The smallest extrinsic polypeptide of the water-oxidizing complex (PsbQ) was extracted and purified from spinach (Spinacia oleracea) photosystem II (PSII) membranes. It was then crystallized in the presence of Zn(2+) and its structure was determined by X-ray diffraction at 1.95-A resolution using the multi-wavelength anomalous diffraction method, with the zinc as the anomalous scatterer. The crystal structure shows that the core of the protein is a four-helix bundle, whereas the amino-terminal portion, which possibly interacts with the photosystem core, is not visible in the crystal. The distribution of positive and negative charges on the protein surface might explain the ability of PsbQ to increase the binding of Cl(-) and Ca(2+) and make them available to PSII.


    Related Citations: 
    • Crystal structure of oxygen-evolving photosystem II from Thermosynechoccus vulcanus at 3.7 A resolution
      Kamiyam, N.,Shen, J.-R.
      (2003) Proc.Natl.Acad.Sci.USA 100: 98
    • Three-dimensional electron cryo-microscopy study of the extrinsic domains of the oxygen-evolving complex of spinach: assignment of the PsbO protein
      Nield, J.,Balsera, M.,De Las Rivas, J.,Barber, J.
      (2002) J.Biol.Chem. 277: 15006
    • Excited State Dynamics in Photosystem II: Insights from the X-Ray Crystal Structure
      Vasilev, S.,Orth, P.,Zouni, A.,Owens, T.G.,Bruce, D.
      (2001) Proc.Natl.Acad.Sci.USA 98: 8602


    Organizational Affiliation

    Dipartimento di Chimica Organica e Centro Biopolimeri del CNR, Università di Padova, Via Marzolo 1, 35131 Padua, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Oxygen-evolving enhancer protein 3
A
149Spinacia oleraceaGene Names: PSBQ
Find proteins for P12301 (Spinacia oleracea)
Go to UniProtKB:  P12301
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 50.282α = 90.00
b = 50.282β = 90.00
c = 94.067γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
MOSFLMdata reduction
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-08-26
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance