ISDA

Entry Detail

PDB ID:

2BM4

Keywords:

Title:

The Structure of MfpA (Rv3361c, C2 Crystal form). The Pentapeptide Repeat Protein from Mycobacterium tuberculosis Folds as A Right- handed Quadrilateral Beta-helix.

Biological Source:

Source Organism:

MYCOBACTERIUM TUBERCULOSIS

Host Organism:

ESCHERICHIA COLI

PDB Version:

Deposition Date:

2005-03-09

Release Date:

2005-06-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.20 Å

R-Value Free:

0.26

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

C 1 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:PENTAPEPTIDE REPEAT FAMILY PROTEIN
Chain IDs:A, B
Chain Length:186
Number of Molecules:2
Biological Source:MYCOBACTERIUM TUBERCULOSIS

UniProt ID:O50390 Pfam ID:PF13599, PF00805

Primary Citation

A Fluroquinolone Resistance Protein from Mycobacterium Tuberculosis that Mimics DNA

Hegde, S.S, Vetting, M.W, Roderick, S.L, Mitchenall, L.A, Maxwell, A, Takiff, H.E, Blanchard, J.S.Show

Science 308 1480 ? (2005)

PMID: 15933203 DOI: 10.1126/SCIENCE.1110699

Abstact

Fluoroquinolones are gaining increasing importance in the treatment of tuberculosis. The expression of MfpA, a member of the pentapeptide repeat family of proteins from Mycobacterium tuberculosis, causes resistance to ciprofloxacin and sparfloxacin. This protein binds to DNA gyrase and inhibits its activity. Its three-dimensional structure reveals a fold, which we have named the right-handed quadrilateral beta helix, that exhibits size, shape, and electrostatic similarity to B-form DNA. This represents a form of DNA mimicry and explains both its inhibitory effect on DNA gyrase and fluoroquinolone resistance resulting from the protein's expression in vivo.

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