1BL0 image
Deposition Date 1998-07-22
Release Date 1998-09-02
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1BL0
Keywords:
TRANSCRIPTION/DNA
Title:
MULTIPLE ANTIBIOTIC RESISTANCE PROTEIN (MARA)/DNA COMPLEX
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.30 Å
R-Value Free:
0.30
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 41 21 2
1BL0 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:PROTEIN (MULTIPLE ANTIBIOTIC RESISTANCE PROTEIN)
Gene (Uniprot):marA
Chain IDs:C (auth: A)
Chain Length:129
Number of Molecules:1
Biological Source:Escherichia coli
UniProt ID:P0ACH5 Pfam ID:PF12833
Primary Citation
A novel DNA-binding motif in MarA: the first structure for an AraC family transcriptional activator.
Proc.Natl.Acad.Sci.USA 95 10413 10418 (1998)
PMID: 9724717 DOI: 10.1073/pnas.95.18.10413

Abstact

A crystal structure for a member of the AraC prokaryotic transcriptional activator family, MarA, in complex with its cognate DNA-binding site is described. MarA consists of two similar subdomains, each containing a helix-turn-helix DNA-binding motif. The two recognition helices of the motifs are inserted into adjacent major groove segments on the same face of the DNA but are separated by only 27 A thereby bending the DNA by approximately 35 degrees. Extensive interactions between the recognition helices and the DNA major groove provide the sequence specificity.

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Primary Citation of related structures
1BL0