1GZ5

Trehalose-6-phosphate synthase. OtsA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Insights Into Trehalose Synthesis Provided by the Structure of the Retaining Glycosyltransferase Otsa

Gibson, R.P.Turkenburg, J.P.Charnock, S.J.Lloyd, R.Davies, G.J.

(2002) Chem Biol 9: 1337

  • DOI: 10.1016/s1074-5521(02)00292-2
  • Primary Citation of Related Structures:  
    1GZ5

  • PubMed Abstract: 
  • Trehalose is a nonreducing disaccharide that plays a major role in many organisms, most notably in survival and stress responses. In Mycobacterium tuberculosis, it plays a central role as the carbohydrate core of numerous immunogenic glycolipids including "cord factor" (trehalose 6,6'-dimycolate) ...

    Trehalose is a nonreducing disaccharide that plays a major role in many organisms, most notably in survival and stress responses. In Mycobacterium tuberculosis, it plays a central role as the carbohydrate core of numerous immunogenic glycolipids including "cord factor" (trehalose 6,6'-dimycolate). The classical pathway for trehalose synthesis involves the condensation of UDP-glucose and glucose-6-phosphate to afford trehalose-6-phosphate, catalyzed by the retaining glycosyltransferase OtsA. The configurations of two anomeric positions are set simultaneously, resulting in the formation of a double glycoside. The three-dimensional structure of the Escherichia coli OtsA, in complex with both UDP and glucose-6-phosphate, reveals the active site at the interface of two beta/alpha/beta domains. The overall structure and the intimate details of the catalytic machinery reveal a striking similarity to glycogen phosphorylase, indicating a strong evolutionary link and suggesting a common catalytic mechanism.


    Related Citations: 
    • Characterization of Escherichia Coli Otsa, a Trehalose-6-Phosphate Synthase from Glycosyltransferase Family 20
      Gibson, R.P., Lloyd, R.M., Charnock, S.J., Davies, G.J.
      (2002) Acta Crystallogr D Biol Crystallogr 58: 349

    Organizational Affiliation

    Department of Chemistry, The University of York, York YO10 5YW, Heslington, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-TREHALOSE-PHOSPHATE SYNTHASE ABCD456Escherichia coli str. K-12 substr. W3110Mutation(s): 0 
EC: 2.4.1.15
Find proteins for P31677 (Escherichia coli (strain K12))
Explore P31677 
Go to UniProtKB:  P31677
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.612α = 90
b = 125.4β = 90
c = 176.607γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary