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 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • Also Cited By: 1UQT, 1UQU

  • 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 incl ...

    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.,Sect.D 58: 349


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA-TREHALOSE-PHOSPHATE SYNTHASE
A, B, C, D
456Escherichia coli (strain K12)Gene Names: otsA
EC: 2.4.1.15
Find proteins for P31677 (Escherichia coli (strain K12))
Go to UniProtKB:  P31677
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
G6P
Query on G6P

Download SDF File 
Download CCD File 
A, B, C, D
ALPHA-D-GLUCOSE-6-PHOSPHATE
C6 H13 O9 P
NBSCHQHZLSJFNQ-DVKNGEFBSA-N
 Ligand Interaction
UDP
Query on UDP

Download SDF File 
Download CCD File 
A, B, C, D
URIDINE-5'-DIPHOSPHATE
C9 H14 N2 O12 P2
XCCTYIAWTASOJW-XVFCMESISA-N
 Ligand Interaction
IMD
Query on IMD

Download SDF File 
Download CCD File 
A, B, C, D
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 103.612α = 90.00
b = 125.400β = 90.00
c = 176.607γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-02-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance