5CJ5

Structure of Mycobacterium thermoresistibile GlgE APO form at 3.13A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.13 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of Mycobacterium thermoresistibile GlgE defines novel conformational states that contribute to the catalytic mechanism.

Mendes, V.Blaszczyk, M.Maranha, A.Empadinhas, N.Blundell, T.L.

(2015) Sci Rep 5: 17144-17144

  • DOI: 10.1038/srep17144
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • GlgE, an enzyme of the pathway that converts trehalose to α-glucans, is essential for Mycobacterium tuberculosis. Inhibition of GlgE, which transfers maltose from a maltose-1-phosphate donor to α-glucan/maltooligosaccharide chain acceptor, leads to a ...

    GlgE, an enzyme of the pathway that converts trehalose to α-glucans, is essential for Mycobacterium tuberculosis. Inhibition of GlgE, which transfers maltose from a maltose-1-phosphate donor to α-glucan/maltooligosaccharide chain acceptor, leads to a toxic accumulation of maltose-1-phosphate that culminates in cellular death. Here we describe the first high-resolution mycobacterial GlgE structure from Mycobacterium thermoresistibile at 1.96 Å. We show that the structure resembles that of M. tuberculosis and Streptomyces coelicolor GlgEs, reported before, with each protomer in the homodimer comprising five domains. However, in M. thermoresistibile GlgE we observe several conformational states of the S domain and provide evidence that its high flexibility is important for enzyme activity. The structures here reported shed further light on the interactions between the N-terminal domains and the catalytic domains of opposing chains and how they contribute to the catalytic reaction. Importantly this work identifies a useful surrogate system to aid the development of GlgE inhibitors against opportunistic and pathogenic mycobacteria.


    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-1,4-glucan:maltose-1-phosphate maltosyltransferase
A, B
698Mycobacterium thermoresistibile (strain ATCC 19527 / DSM 44167 / CIP 105390 / JCM 6362 / NCTC 10409 / 316)Mutation(s): 0 
Gene Names: glgE
EC: 2.4.99.16
Find proteins for G7CL00 (Mycobacterium thermoresistibile (strain ATCC 19527 / DSM 44167 / CIP 105390 / JCM 6362 / NCTC 10409 / 316))
Go to UniProtKB:  G7CL00
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.13 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.259 
  • Space Group: P 6
Unit Cell:
Length (Å)Angle (°)
a = 197.639α = 90.00
b = 197.639β = 90.00
c = 105.623γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-09
    Type: Initial release