ISDA

Deposition Date 2006-11-29

Release Date 2007-03-27

Last Version Date 2023-08-30

Entry Detail

PDB ID:

2O20

Keywords:

TRANSCRIPTION

Title:

Crystal structure of transcription regulator CcpA of Lactococcus lactis

Biological Source:

Source Organism:

Lactococcus lactis (Taxon ID: 1358)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.21

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Catabolite control protein A
Gene (Uniprot):ccpA
Mutations:D89A
Chain IDs:A, B (auth: C), C (auth: D), D (auth: B), E, F, G, H
Chain Length:332
Number of Molecules:8
Biological Source:Lactococcus lactis

UniProt ID:Q9CF33 Pfam ID:PF00356, PF00532

Ligand Molecules

SO4

Primary Citation

Structure of the transcription regulator CcpA from Lactococcus lactis

Loll, B, Kowalczyk, M, Alings, C, Chieduch, A, Bardowski, J, Saenger, W, Biesiadka, J.Show

Acta Crystallogr.,Sect.D 63 431 436 (2007)

PMID: 17372346 DOI: 10.1107/S0907444907000546

Abstact

Catabolite control protein A (CcpA) functions as master transcriptional regulator of carbon catabolism in Firmicutes. It belongs to the family of bacterial repressor/regulator proteins. Here, the crystal structure of the 76 kDa homodimeric CcpA protein from Lactococcus lactis subsp. lactis IL1403 is presented at 1.9 A resolution in the absence of cognate DNA. The phases were derived by molecular replacement and the structure was refined to crystallographic R and R(free) factors of 0.177 and 0.211, respectively. The presence of a sulfate molecule in the direct vicinity of a putative effector-binding site in the monomer allowed the derivation of a model for the possible binding of small organic effector molecules.

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