3LS1 image
Entry Detail
PDB ID:
3LS1
Keywords:
PHOTOSYNTHESIS
Title:
Crystal Structure of Cyanobacterial PsbQ from Synechocystis sp. PCC 6803 complexed with Zn2+
Biological Source:
Source Organism:
Synechocystis sp.
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2010-02-12
Release Date:
2010-03-31
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.85 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.18
Space Group:
I 1 2 1
3LS1 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Sll1638 protein
Chain IDs:A, B
Chain Length:133
Number of Molecules:2
Biological Source:Synechocystis sp.
UniProt ID:P73048 Pfam ID:PF05757
Ligand Molecules
ZN
Primary Citation
Crystal Structure of PsbQ from Synechocystis sp. PCC 6803 at 1.8 A: Implications for Binding and Function in Cyanobacterial Photosystem II
Biochemistry 49 2765 2767 (2010)
PMID: 20210304 DOI: 10.1021/bi100217h

Abstact

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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Primary Citation of related structures
3LS0