3ZKD

CRYSTAL STRUCTURE OF THE ATPASE REGION OF Mycobacterium tuberculosis GyrB WITH AMPPNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mycobacterium Tuberculosis DNA Gyrase ATPase Domain Structures Suggest a Dissociative Mechanism that Explains How ATP Hydrolysis is Coupled to Domain Motion.

Agrawal, A.Roue, M.Spitzfaden, C.Petrella, S.Aubry, A.Hann, M.M.Bax, B.Mayer, C.

(2013) Biochem.J. 456: 263

  • DOI: 10.1042/BJ20130538
  • Primary Citation of Related Structures:  3ZKB, 3ZM7

  • PubMed Abstract: 
  • DNA gyrase, a type II topoisomerase, regulates DNA topology by creating a double-stranded break in one DNA duplex and transporting another DNA duplex [T-DNA (transported DNA)] through this break. The ATPase domains dimerize, in the presence of ATP, t ...

    DNA gyrase, a type II topoisomerase, regulates DNA topology by creating a double-stranded break in one DNA duplex and transporting another DNA duplex [T-DNA (transported DNA)] through this break. The ATPase domains dimerize, in the presence of ATP, to trap the T-DNA segment. Hydrolysis of only one of the two ATPs, and release of the resulting Pi, is rate-limiting in DNA strand passage. A long unresolved puzzle is how the non-hydrolysable ATP analogue AMP-PNP (adenosine 5'-[β,γ-imido]triphosphate) can catalyse one round of DNA strand passage without Pi release. In the present paper we discuss two crystal structures of the Mycobacterium tuberculosis DNA gyrase ATPase domain: one complexed with AMP-PCP (adenosine 5'-[β,γ-methylene]triphosphate) was unexpectedly monomeric, the other, an AMP-PNP complex, crystallized as a dimer. In the AMP-PNP structure, the unprotonated nitrogen (P-N=P imino) accepts hydrogen bonds from a well-ordered 'ATP lid', which is known to be required for dimerization. The equivalent CH2 group, in AMP-PCP, cannot accept hydrogen bonds, leaving the 'ATP lid' region disordered. Further analysis suggested that AMP-PNP can be converted from the imino (P-N=P) form into the imido form (P-NH-P) during the catalytic cycle. A main-chain NH is proposed to move to either protonate AMP-P-N=P to AMP-P-NH-P, or to protonate ATP to initiate ATP hydrolysis. This suggests a novel dissociative mechanism for ATP hydrolysis that could be applicable not only to GHKL phosphotransferases, but also to unrelated ATPases and GTPases such as Ras. On the basis of the domain orientation in our AMP-PCP structure we propose a mechanochemical scheme to explain how ATP hydrolysis is coupled to domain motion.


    Organizational Affiliation

    *Platform Technology Sciences, GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA GYRASE SUBUNIT B
A, B, C, D, E, F, G, H
432Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Gene Names: gyrB
EC: 5.99.1.3
Find proteins for P9WG45 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WG45
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.182 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 71.953α = 108.21
b = 97.851β = 105.18
c = 138.075γ = 91.04
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
BUSTERrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-18
    Type: Initial release
  • Version 1.1: 2013-11-20
    Type: Database references