4G3N

Mycobacterium tuberculosis gyrase type IIA topoisomerase C-terminal domain at 1.4 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Mycobacterium tuberculosis DNA gyrase possesses two functional GyrA-boxes.

Bouige, A.Darmon, A.Piton, J.Roue, M.Petrella, S.Capton, E.Forterre, P.Aubry, A.Mayer, C.

(2013) Biochem J 455: 285-294

  • DOI: 10.1042/BJ20130430
  • Primary Citation of Related Structures:  
    4G3N

  • PubMed Abstract: 
  • In contrast with most bacteria which possess two type II topoisomerases (topoisomerase IV and DNA gyrase), Mycobacterium tuberculosis possesses only one, DNA gyrase, which is functionally a hybrid enzyme. Functional differences between the two type I ...

    In contrast with most bacteria which possess two type II topoisomerases (topoisomerase IV and DNA gyrase), Mycobacterium tuberculosis possesses only one, DNA gyrase, which is functionally a hybrid enzyme. Functional differences between the two type IIA topoisomerases are thought to be specified by a CTD (C-terminal DNA-binding domain), which controls DNA recognition. To explore the molecular mechanism responsible for the hybrid functions of the M. tuberculosis DNA gyrase, we conducted a series of sequence analyses and structural and biochemical experiments with the isolated GyrA CTD and the holoenzyme. Although the CTD displayed a global structure similar to that of bona fide GyrA and ParC paralogues, it harbours a second key motif similar in all respects to that of the conserved GyrA-box sequence motif. Biochemical assays showed that the GyrA-box is responsible for DNA supercoiling, whereas the second GyrA-box-l (GyrA-box-like motif) is responsible for the enhanced decatenation activity, suggesting that the mechanistic originality of M. tuberculosis DNA gyrase depends largely on the particular DNA path around the CTD allowed for by the presence of GyrA-box-l. The results of the present study also provide, through phylogenetic exploration of the entire Corynebacterineae suborder, a new and broader insight into the functional diversity of bacterial type IIA topoisomerases.


    Organizational Affiliation

    *UPMC Université Paris 06, ER5, EA 1541, Laboratoire de Bactériologie-Hygiène, 91 bd de l'Hôpital, F 75013 Paris, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA gyrase subunit AA327Mycobacterium tuberculosis H37RvMutation(s): 1 
Gene Names: gyrAMT0006mtct10h4.04MTCY10H4.04Rv0006rv006
EC: 5.99.1.3 (PDB Primary Data), 5.6.2.2 (UniProt)
Find proteins for P9WG47 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WG47 
Go to UniProtKB:  P9WG47
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.7α = 90
b = 80.519β = 90
c = 88.182γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
AMoREphasing
BUSTERrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-07
    Type: Initial release
  • Version 1.1: 2013-10-23
    Changes: Database references