1SG7 image
Deposition Date 2004-02-23
Release Date 2005-03-08
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1SG7
Keywords:
STRUCTURAL GENOMICS, UNKNOWN FUNCTION
Title:
NMR solution structure of the putative cation transport regulator ChaB
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
100
Conformers Submitted:
17
Selection Criteria:
structures with the lowest energy
1SG7 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Putative Cation transport regulator chaB
Chain IDs:A
Chain Length:96
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0AE65 Pfam ID:PF06150
Ligand Molecules
NA
Primary Citation
The solution structure of ChaB, a putative membrane ion antiporter regulator from Escherichia coli
BMC STRUCT.BIOL. 4 9 ? (2004)
PMID: 15306028 DOI: 10.1186/1472-6807-4-9

Abstact

BACKGROUND ChaB is a putative regulator of ChaA, a Na+/H+ antiporter that also has Ca+/H+ activity in E. coli. ChaB contains a conserved 60-residue region of unknown function found in other bacteria, archaeabacteria and a series of baculoviral proteins. As part of a structural genomics project, the structure of ChaB was elucidated by NMR spectroscopy. RESULTS The structure of ChaB is composed of 3 alpha-helices and a small sheet that pack tightly to form a fold that is found in the cyclin-box family of proteins. CONCLUSION ChaB is distinguished from its putative DNA binding sequence homologues by a highly charged flexible loop region that has weak affinity to Mg2+ and Ca2+ divalent metal ions.

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Primary Citation of related structures
1SG7