3LS0

Crystal Structure of Cyanobacterial PsbQ from Synechocystis sp. PCC 6803

• PDB DOI:  https://doi.org/10.2210/pdb3LS0/pdb

• Classification: PHOTOSYNTHESIS
• Organism(s): Synechocystis sp. PCC 6803
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-02-12 Released: 2010-03-31 
• Deposition Author(s): Jackson, S.A., Fagerlund, R.D., Wilbanks, S.M., Eaton-Rye, J.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.208 
• R-Value Work: 0.167 
• R-Value Observed: 0.169 

Literature

Crystal Structure of PsbQ from Synechocystis sp. PCC 6803 at 1.8 A: Implications for Binding and Function in Cyanobacterial Photosystem II

Jackson, S.A., Fagerlund, R.D., Wilbanks, S.M., Eaton-Rye, J.J.

(2010) Biochemistry 49: 2765-2767

• PubMed: 20210304 
• DOI: https://doi.org/10.1021/bi100217h
• Primary Citation of Related Structures:  
  3LS0, 3LS1


• PubMed Abstract: 
  

In Synechocystis sp. PCC 6803, PsbQ is associated with photosystem II (PSII) complexes with the highest activity and stability. However, this subunit is not found in PSII X-ray crystallographic structures from Thermosynechococcus elongatus or Thermosynechococcus vulcanus. We present the crystal structure of cyanobacterial PsbQ determined in the presence and absence of Zn(2+). The protein has a well-defined helical core, containing four helices arranged in an up-down-up-down fold. A conserved potential interaction site composed of a divalent metal binding site and adjacent hydrophobic pocket has been identified.

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Organizational Affiliation: 

Department of Biochemistry, University of Otago, Dunedin 9054, New Zealand.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 14.61 kDa 
• Atom Count: 1,014 
• Modelled Residue Count: 115 
• Deposited Residue Count: 133 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sll1638 protein	A	133	Synechocystis sp. PCC 6803	Mutation(s): 0  Gene Names: sll1638
UniProt
Find proteins for P73048 (Synechocystis sp. (strain PCC 6803 / Kazusa)) Explore P73048  Go to UniProtKB:  P73048

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.208 
• R-Value Work: 0.167 
• R-Value Observed: 0.169 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 28.332	α = 90
b = 46.787	β = 90
c = 93.51	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
SHELX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-03-31 
Deposition Author(s): Jackson, S.A., Fagerlund, R.D., Wilbanks, S.M., Eaton-Rye, J.J.

Revision History  

• Version 1.0: 2010-03-31
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-11-01
  Changes: Refinement description