Biological Assembly 1  

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Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 60977.58 
• Atom Count: 4130 
• Residue Count: 558 
• Unique protein chains: 1

2BM7

The Structure of MfpA (Rv3361c, P3221 Crystal form). The Pentapeptide Repeat Protein from Mycobacterium tuberculosis Folds as A Right- handed Quadrilateral Beta-helix.

• DOI: 10.2210/pdb2BM7/pdb

• Classification: PENTAPEPTIDE REPEAT PROTEIN
• Organism(s): Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
• Expression System: Escherichia coli


• 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.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.289 
• R-Value Work: 0.229 

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 
• DOI: 10.1126/science.1110699
• Primary Citation of Related Structures:  
  2BM6, 2BM5, 2BM4


• 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PENTAPEPTIDE REPEAT FAMILY PROTEIN	A, B, C	186	Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)	Mutation(s): 0
Find proteins for O50390 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)) Go to UniProtKB:  O50390

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.7 Å
• R-Value Free: 0.289 
• R-Value Work: 0.229 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 84.080	α = 90.00
b = 84.080	β = 90.00
c = 147.122	γ = 120.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-03-09 
• Released Date: 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.

Revision History 

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