1DQZ

CRYSTAL STRUCTURE OF ANTIGEN 85C FROM MYCOBACTERIUM TUBERCULOSIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.167 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the secreted form of antigen 85C reveals potential targets for mycobacterial drugs and vaccines.

Ronning, D.R.Klabunde, T.Besra, G.S.Vissa, V.D.Belisle, J.T.Sacchettini, J.C.

(2000) Nat.Struct.Mol.Biol. 7: 141-146

  • DOI: 10.1038/72413
  • Primary Citation of Related Structures:  1DQY

  • PubMed Abstract: 
  • The antigen 85 (ag85) complex, composed of three proteins (ag85A, B and C), is a major protein component of the Mycobacterium tuberculosis cell wall. Each protein possesses a mycolyltransferase activity required for the biogenesis of trehalose dimyco ...

    The antigen 85 (ag85) complex, composed of three proteins (ag85A, B and C), is a major protein component of the Mycobacterium tuberculosis cell wall. Each protein possesses a mycolyltransferase activity required for the biogenesis of trehalose dimycolate (cord factor), a dominant structure necessary for maintaining cell wall integrity. The crystal structure of recombinant ag85C from M. tuberculosis, refined to a resolution of 1.5 A, reveals an alpha/beta-hydrolase polypeptide fold, and a catalytic triad formed by Ser 124, Glu 228 and His 260. ag85C complexed with a covalent inhibitor implicates residues Leu 40 and Met 125 as components of the oxyanion hole. A hydrophobic pocket and tunnel extending 21 A into the core of the protein indicates the location of a probable trehalose monomycolate binding site. Also, a large region of conserved surface residues among ag85A, B and C is a probable site for the interaction of ag85 proteins with human fibronectin.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77844-2128, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (ANTIGEN 85-C)
A, B
280Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Gene Names: fbpC (mpt45)
EC: 2.3.1.122, 2.3.1.20
Find proteins for P9WQN9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WQN9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.167 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 67.718α = 90.00
b = 75.947β = 90.00
c = 137.388γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
CNSrefinement
HKL-2000data scaling
HKL-2000data reduction
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-07-12
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance