2JLB

Xanthomonas campestris putative OGT (XCC0866), complex with UDP- GlcNAc phosphonate analogue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insights Into Mechanism and Specificity of O-Glcnac Transferase.

Clarke, A.J.Hurtado-Guerrero, R.Pathak, S.Schuttelkopf, A.W.Borodkin, V.Shepherd, S.M.Ibrahim, A.F.M.Van Aalten, D.M.F.

(2008) EMBO J 27: 2780

  • DOI: 10.1038/emboj.2008.186
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Post-translational modification of protein serines/threonines with N-acetylglucosamine (O-GlcNAc) is dynamic, inducible and abundant, regulating many cellular processes by interfering with protein phosphorylation. O-GlcNAcylation is regulated by O-Gl ...

    Post-translational modification of protein serines/threonines with N-acetylglucosamine (O-GlcNAc) is dynamic, inducible and abundant, regulating many cellular processes by interfering with protein phosphorylation. O-GlcNAcylation is regulated by O-GlcNAc transferase (OGT) and O-GlcNAcase, both encoded by single, essential, genes in metazoan genomes. It is not understood how OGT recognises its sugar nucleotide donor and performs O-GlcNAc transfer onto proteins/peptides, and how the enzyme recognises specific cellular protein substrates. Here, we show, by X-ray crystallography and mutagenesis, that OGT adopts the (metal-independent) GT-B fold and binds a UDP-GlcNAc analogue at the bottom of a highly conserved putative peptide-binding groove, covered by a mobile loop. Strikingly, the tetratricopeptide repeats (TPRs) tightly interact with the active site to form a continuous 120 A putative interaction surface, whereas the previously predicted phosphatidylinositide-binding site locates to the opposite end of the catalytic domain. On the basis of the structure, we identify truncation/point mutants of the TPRs that have differential effects on activity towards proteins/peptides, giving first insights into how OGT may recognise its substrates.


    Organizational Affiliation

    Division of Biological Chemistry & Drug Discovery, College of Life Sciences, University of Dundee, Dundee, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
XCC0866A, B568Xanthomonas campestris pv. campestrisMutation(s): 0 
Find proteins for Q8PC69 (Xanthomonas campestris pv. campestris (strain ATCC 33913 / DSM 3586 / NCPPB 528 / LMG 568 / P 25))
Explore Q8PC69 
Go to UniProtKB:  Q8PC69
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UDM
Query on UDM

Download CCD File 
A, B
URIDINE-DIPHOSPHATE-METHYLENE-N-ACETYL-GLUCOSAMINE
C18 H29 N3 O16 P2
KUFKOJZYUNOEES-DLLWPQOWSA-N
 Ligand Interaction
MN
Query on MN

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

Download CCD File 
B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UDMKd:  4200   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.86α = 90
b = 100.527β = 90
c = 154.521γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance