2CS7 image
Deposition Date 2005-05-20
Release Date 2006-02-14
Last Version Date 2024-02-14
Entry Detail
PDB ID:
2CS7
Keywords:
STRUCTURAL GENOMICS, UNKNOWN FUNCTION
Title:
1.2 A Crystal structure of the S. pneumoniae PhtA histidine triad domain a novel zinc binding fold
Biological Source:
Source Organism:
Streptococcus pneumoniae (Taxon ID: 1313)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.20 Å
R-Value Free:
0.13
R-Value Work:
0.11
R-Value Observed:
0.11
Space Group:
C 1 2 1
2CS7 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:pneumococcal histidine triad A protein
Chain IDs:A, B, C
Chain Length:55
Number of Molecules:3
Biological Source:Streptococcus pneumoniae
UniProt ID:A0A0H2UQ89 Pfam ID:PF04270
Ligand Molecules
ZN
Primary Citation
1.2 Angstroms crystal structure of the S. pneumoniae PhtA histidine triad domain a novel zinc binding fold.
Febs Lett. 579 5353 5360 (2005)
PMID: 16194532 DOI: 10.1016/j.febslet.2005.08.066

Abstact

The recently described pneumococcal histidine triad protein family has been shown to be highly conserved within the pneumococcus. As part of our structural genomics effort on proteins from Streptococcus pneumoniae, we have expressed, crystallised and solved the structure of PhtA-166-220 at 1.2 Angstroms using remote SAD with zinc. The structure of PhtA-166-220 shows no similarity to any protein structure. The overall fold contains 3beta-strands and a single short alpha-helix. The structure appears to contain a novel zinc binding motif. The remaining 4 histidine triad repeats from PhtA have been modelled based on the crystal structure of the PhtA histidine triad repeat 2. From this modelling work, we speculate that only three of the five histidine triad repeats contain the residues in the correct geometry to allow the binding of a zinc ion.

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Primary Citation of related structures
2CS7