2R4U

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 

Starting Model: experimental
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This is version 1.4 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: https://doi.org/10.1074/jbc.M809804200
  • Primary Citation of Related Structures:  
    2QZS, 2R4T, 2R4U, 3COP, 3D1J, 3GUH

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycogen synthase485Escherichia coliMutation(s): 0 
Gene Names: glgA
EC: 2.4.1.21
UniProt
Find proteins for P0A6U8 (Escherichia coli (strain K12))
Explore P0A6U8 
Go to UniProtKB:  P0A6U8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6U8
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PE3
Query on PE3

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A],
G [auth A]
3,6,9,12,15,18,21,24,27,30,33,36,39-TRIDECAOXAHENTETRACONTANE-1,41-DIOL
C28 H58 O15
ILLKMACMBHTSHP-UHFFFAOYSA-N
ADP
Query on ADP

Download Ideal Coordinates CCD File 
C [auth A]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
250
Query on 250

Download Ideal Coordinates CCD File 
D [auth A](2R)-2-hydroxy-3-[4-(2-hydroxyethyl)piperazin-1-yl]propane-1-sulfonic acid
C9 H20 N2 O5 S
GIZQLVPDAOBAFN-SECBINFHSA-N
GLC
Query on GLC

Download Ideal Coordinates CCD File 
B [auth A]alpha-D-glucopyranose
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.166α = 90
b = 126.166β = 90
c = 151.745γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Database references, Derived calculations, Structure summary
  • Version 1.4: 2023-08-30
    Changes: Data collection, Database references, Refinement description, Structure summary