ISDA

Deposition Date 2006-07-21

Release Date 2007-06-05

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2HSG

Keywords:

TRANSCRIPTION REGULATOR

Title:

Structure of transcription regulator CcpA in its DNA-free state

Biological Source:

Source Organism:

Bacillus megaterium (Taxon ID: 1404)

Host Organism:

Escherichia coli BL21

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.33

R-Value Work:

0.27

R-Value Observed:

0.28

Space Group:

P 61 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Glucose-resistance amylase regulator
Gene (Uniprot):ccpA
Chain IDs:A
Chain Length:332
Number of Molecules:1
Biological Source:Bacillus megaterium

UniProt ID:P46828 Pfam ID:PF00356, PF13377

Ligand Molecules

Primary Citation

Structure of full-length transcription regulator CcpA in the apo form.

Loll, B, Saenger, W, Biesiadka, J.Show

Biochim.Biophys.Acta 1774 732 736 (2007)

PMID: 17500051 DOI: 10.1016/j.bbapap.2007.03.020

Abstact

The catabolite control protein A (CcpA) from Bacillus megaterium is a member of the bacterial repressor protein family GalR-LacI. CcpA functions as master transcriptional regulator of carbon catabolite repression/regulation in firmicutes. Here we present the crystal structure of full-length apo CcpA at 2.5 A resolution from B. megaterium. The structure reveals the location of the helix-turn-helix domain as well as the hinge region, which were not visible due to their high flexibility in earlier crystallographic studies on CcpA molecules. The structure of the apo CcpA homodimer in the present form is in contrast to other reported structures for CcpA.

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Primary Citation of related structures