2BM4

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

PDB DOI: https://doi.org/10.2210/pdb2BM4/pdb

Classification: PENTAPEPTIDE REPEAT PROTEIN
Organism(s): Mycobacterium tuberculosis H37Rv
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2005-03-09 Released: 2005-06-07
Deposition Author(s): Hegde, S.S., Vetting, M.W., Roderick, S.L., Mitchenall, L.A., Maxwell, A., Takiff, H.E., Blanchard, J.S.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Free: 0.264
R-Value Work: 0.199
R-Value Observed: 0.199

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

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.

(2005) Science 308: 1480

PubMed: 15933203 Search on PubMed
DOI: https://doi.org/10.1126/science.1110699
Primary Citation of Related Structures:
2BM4, 2BM5, 2BM6, 2BM7

PubMed Abstract:
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.

Organizational Affiliation

Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.

Macromolecule Content

Total Structure Weight: 40.65 kDa
Atom Count: 2,858
Modelled Residue Count: 361
Deposited Residue Count: 372
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PENTAPEPTIDE REPEAT FAMILY PROTEIN	A, B	186	Mycobacterium tuberculosis H37Rv	Mutation(s): 0
UniProt
Find proteins for O50390 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)) Explore O50390 Go to UniProtKB: O50390
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	O50390
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Free: 0.264
R-Value Work: 0.199
R-Value Observed: 0.199
Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 177.18	α = 90
b = 31.109	β = 111.45
c = 69.601	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

View Full Validation Report

Entry History

Deposition Data

Released Date: 2005-06-07

Deposition Author(s):

Mitchenall, L.A.

Blanchard, J.S.

Revision History (Full details and data files)

Version 1.0: 2005-06-07
Type: Initial release
Version 1.1: 2011-05-08
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Version format compliance

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.