3K6Y

Crystal structure of Rv3671c protease from M. tuberculosis, active form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insight into serine protease Rv3671c that Protects M. tuberculosis from oxidative and acidic stress.

Biswas, T.Small, J.Vandal, O.Odaira, T.Deng, H.Ehrt, S.Tsodikov, O.V.

(2010) Structure 18: 1353-1363

  • DOI: 10.1016/j.str.2010.06.017
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Rv3671c, a putative serine protease, is crucial for persistence of Mycobacterium tuberculosis in the hostile environment of the phagosome. We show that Rv3671c is required for M. tuberculosis resistance to oxidative stress in addition to its role in ...

    Rv3671c, a putative serine protease, is crucial for persistence of Mycobacterium tuberculosis in the hostile environment of the phagosome. We show that Rv3671c is required for M. tuberculosis resistance to oxidative stress in addition to its role in protection from acidification. Structural and biochemical analyses demonstrate that the periplasmic domain of Rv3671c is a functional serine protease of the chymotrypsin family and, remarkably, that its activity increases on oxidation. High-resolution crystal structures of this protease in an active strained state and in an inactive relaxed state reveal that a solvent-exposed disulfide bond controls the protease activity by constraining two distant regions of Rv3671c and stabilizing it in the catalytically active conformation. In vitro biochemical studies confirm that activation of the protease in an oxidative environment is dependent on this reversible disulfide bond. These results suggest that the disulfide bond modulates activity of Rv3671c depending on the oxidative environment in vivo.


    Organizational Affiliation

    Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
POSSIBLE MEMBRANE-ASSOCIATED SERINE PROTEASE
A
237Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
EC: 3.4.21.-
Find proteins for P9WHR9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WHR9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.165 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 64.678α = 90.00
b = 64.678β = 90.00
c = 98.655γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance