3U2U

Crystal Structure of Human Glycogenin-1 (GYG1) complexed with manganese, UDP and maltotetraose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Conformational plasticity of glycogenin and its maltosaccharide substrate during glycogen biogenesis.

Chaikuad, A.Froese, D.S.Berridge, G.von Delft, F.Oppermann, U.Yue, W.W.

(2011) Proc.Natl.Acad.Sci.USA 108: 21028-21033

  • DOI: 10.1073/pnas.1113921108
  • Primary Citation of Related Structures:  3Q4S, 3QVB, 3RMV, 3RMW, 3T7M, 3T7N, 3T7O, 3U2T, 3U2V, 3U2W

  • PubMed Abstract: 
  • Glycogenin initiates the synthesis of a maltosaccharide chain covalently attached to itself on Tyr195 via a stepwise glucosylation reaction, priming glycogen synthesis. We have captured crystallographic snapshots of human glycogenin during its reacti ...

    Glycogenin initiates the synthesis of a maltosaccharide chain covalently attached to itself on Tyr195 via a stepwise glucosylation reaction, priming glycogen synthesis. We have captured crystallographic snapshots of human glycogenin during its reaction cycle, revealing a dynamic conformational switch between ground and active states mediated by the sugar donor UDP-glucose. This switch includes the ordering of a polypeptide stretch containing Tyr195, and major movement of an approximately 30-residue "lid" segment covering the active site. The rearranged lid guides the nascent maltosaccharide chain into the active site in either an intra- or intersubunit mode dependent upon chain length and steric factors and positions the donor and acceptor sugar groups for catalysis. The Thr83Met mutation, which causes glycogen storage disease XV, is conformationally locked in the ground state and catalytically inactive. Our data highlight the conformational plasticity of glycogenin and coexistence of two modes of glucosylation as integral to its catalytic mechanism.


    Organizational Affiliation

    Structural Genomics Consortium, Old Road Research Campus Building, Oxford, United Kingdom OX3 7DQ.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glycogenin-1
A, B
263Homo sapiensGene Names: GYG1 (GYG)
EC: 2.4.1.186
Find proteins for P46976 (Homo sapiens)
Go to Gene View: GYG1
Go to UniProtKB:  P46976
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
GLC
Query on GLC

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Download CCD File 
A, B
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
UDP
Query on UDP

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Download CCD File 
A, B
URIDINE-5'-DIPHOSPHATE
C9 H14 N2 O12 P2
XCCTYIAWTASOJW-XVFCMESISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 46.765α = 79.36
b = 46.844β = 88.45
c = 69.848γ = 77.20
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
PHASERphasing
REFMACrefinement
GDAdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2011-12-28
    Type: Database references
  • Version 1.2: 2012-01-11
    Type: Database references