3ZO9

The structure of Trehalose Synthase (TreS) of Mycobacterium smegmatis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.164 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Structure of the Mycobacterium Smegmatis Trehalose Synthase Reveals an Unusual Active Site Configuration and Acarbose-Binding Mode.

Caner, S.Nguyen, N.Aguda, A.Zhang, R.Pan, Y.T.Withers, S.G.Brayer, G.D.

(2013) Glycobiology 23: 1075

  • DOI: 10.1093/glycob/cwt044
  • Primary Citation of Related Structures:  
    3ZOA, 3ZO9

  • PubMed Abstract: 
  • Trehalose synthase (TreS) catalyzes the reversible conversion of maltose into trehalose in mycobacteria as one of three biosynthetic pathways to this nonreducing disaccharide. Given the importance of trehalose to survival of mycobacteria, there has been considerable interest in understanding the enzymes involved in its production; indeed the structures of the key enzymes in the other two pathways have already been determined ...

    Trehalose synthase (TreS) catalyzes the reversible conversion of maltose into trehalose in mycobacteria as one of three biosynthetic pathways to this nonreducing disaccharide. Given the importance of trehalose to survival of mycobacteria, there has been considerable interest in understanding the enzymes involved in its production; indeed the structures of the key enzymes in the other two pathways have already been determined. Herein, we present the first structure of TreS from Mycobacterium smegmatis, thereby providing insights into the catalytic machinery involved in this intriguing intramolecular reaction. This structure, which is of interest both mechanistically and as a potential pharmaceutical target, reveals a narrow and enclosed active site pocket within which intramolecular substrate rearrangements can occur. We also present the structure of a complex of TreS with acarbose, revealing a hitherto unsuspected oligosaccharide-binding site within the C-terminal domain. This may well provide an anchor point for the association of TreS with glycogen, thereby enhancing its role in glycogen biosynthesis and degradation.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of British Columbia, British Columbia, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TREHALOSE SYNTHASE/AMYLASE TRESA, B593Mycolicibacterium smegmatisMutation(s): 0 
EC: 3.2.1.1 (PDB Primary Data), 5.4.99.16 (PDB Primary Data)
Find proteins for A0R6E0 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore A0R6E0 
Go to UniProtKB:  A0R6E0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.164 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.55α = 90
b = 127.55β = 90
c = 217.76γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-08-07
    Changes: Database references