Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18413.92 
• Atom Count: 1209 
• Residue Count: 165 
• Unique protein chains: 1

2XB3

The Structure of Cyanobacterial PsbP

• DOI: 10.2210/pdb2XB3/pdb

• Classification: PHOTOSYNTHESIS
• Organism(s): Thermosynechococcus elongatus (strain BP-1)
• Expression System: Escherichia coli


• Deposited: 2010-04-03 Released: 2010-08-25 
• Deposition Author(s): Michoux, F., Takasaka, K., Nixon, P., Murray, J.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.238 
• R-Value Work: 0.192 

Literature

The Structure of Cyanop at 2.8A: Implications for the Evolution and Function of the Psbp Subunit of Photosystem II.

Michoux, F., Takasaka, K., Boehm, M., Nixon, P., Murray, J.W.

(2010) Biochemistry 49: 7411

• PubMed: 20698571 
• DOI: 10.1021/bi1011145


• PubMed Abstract: 
  

We present here the crystal structure of CyanoP (Tlr2075) from Thermosynechococcus elongatus at 2.8 A. CyanoP is a substoichiometric component of the isolated cyanobacterial Photosystem II (PSII) complex, distantly related to the PsbP extrinsic subunit of the oxygen-evolving PSII complex in higher plants and green algae. Despite the relatively low degree of sequence similarity, we have found that CyanoP adopts the same beta-sandwich fold as higher-plant PsbP and contains a well-conserved metal (zinc)-binding site that is also present in plant PsbP. Our results support the idea that CyanoP represents the basal structural fold of the PsbP superfamily.

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Organizational Affiliation: 

Division of Biology, Wolfson Biochemistry Building, Imperial College London,South Kensington Campus, London SW7 2AZ, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PSBP PROTEIN	A	165	Thermosynechococcus elongatus (strain BP-1)	Mutation(s): 0  Gene Names: psbP
Find proteins for Q8DH84 (Thermosynechococcus elongatus (strain BP-1)) Go to UniProtKB:  Q8DH84

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.238 
• R-Value Work: 0.192 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 64.946	α = 90.00
b = 64.946	β = 90.00
c = 81.806	γ = 120.00

Software Package:

Software Name	Purpose
SCALA	data scaling
PHENIX	phasing
REFMAC	refinement
MOSFLM	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-04-03 
• Released Date: 2010-08-25 
• Deposition Author(s): Michoux, F., Takasaka, K., Nixon, P., Murray, J.W.

Revision History 

• Version 1.0: 2010-08-25
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance