2QZS

Crystal Structure of Wild-type E.coli GS in complex with ADP and Glucose(wtGSb)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

The Crystal Structures of the Open and Catalytically Competent Closed Conformation of Escherichia coli Glycogen Synthase.

Sheng, F., Jia, X., Yep, A., Preiss, J., Geiger, J.H.

(2009) J.Biol.Chem. 284: 17796-17807

  • DOI: 10.1074/jbc.M809804200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Escherichia coli glycogen synthase (EcGS, EC 2.4.1.21) is a retaining glycosyltransferase (GT) that transfers glucose from adenosine diphosphate glucose to a glucan chain acceptor with retention of configuration at the anomeric carbon. EcGS belongs t ...

    Escherichia coli glycogen synthase (EcGS, EC 2.4.1.21) is a retaining glycosyltransferase (GT) that transfers glucose from adenosine diphosphate glucose to a glucan chain acceptor with retention of configuration at the anomeric carbon. EcGS belongs to the GT-B structural superfamily. Here we report several EcGS x-ray structures that together shed considerable light on the structure and function of these enzymes. The structure of the wild-type enzyme bound to ADP and glucose revealed a 15.2 degrees overall domain-domain closure and provided for the first time the structure of the catalytically active, closed conformation of a glycogen synthase. The main chain carbonyl group of His-161, Arg-300, and Lys-305 are suggested by the structure to act as critical catalytic residues in the transglycosylation. Glu-377, previously thought to be catalytic is found on the alpha-face of the glucose and plays an electrostatic role in the active site and as a glucose ring locator. This is also consistent with the structure of the EcGS(E377A)-ADP-HEPPSO complex where the glucose moiety is either absent or disordered in the active site.

    Organizational Affiliation: 

    Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
glycogen synthase
A
485Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: glgA
EC: 2.4.1.21
Find proteins for P0A6U8 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6U8
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
250
Query on 250
Download SDF File 
Download CCD File 
A
(2R)-2-hydroxy-3-[4-(2-hydroxyethyl)piperazin-1-yl]propane-1-sulfonic acid
C9 H20 N2 O5 S
GIZQLVPDAOBAFN-SECBINFHSA-N
 Ligand Interaction
ADP
Query on ADP
Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
GLC
Query on GLC
Download SDF File 
Download CCD File 
A
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.203 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 126.494α = 90.00
b = 126.494β = 90.00
c = 151.878γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
MOLREPphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2007-08-17 
  • Released Date: 2008-09-09 
  • Deposition Author(s): Sheng, F., Geiger, J.

Revision History 

  • Version 1.0: 2008-09-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description