5C1D

Human OGT in complex with UDP-5S-GlcNAc and substrate peptide (RB2L)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The active site of O-GlcNAc transferase imposes constraints on substrate sequence.

Pathak, S.Alonso, J.Schimpl, M.Rafie, K.Blair, D.E.Borodkin, V.S.Schuttelkopf, A.W.Albarbarawi, O.van Aalten, D.M.

(2015) Nat.Struct.Mol.Biol. 22: 744-750

  • DOI: 10.1038/nsmb.3063
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • O-GlcNAc transferase (OGT) glycosylates a diverse range of intracellular proteins with O-linked N-acetylglucosamine (O-GlcNAc), an essential and dynamic post-translational modification in metazoans. Although this enzyme modifies hundreds of proteins ...

    O-GlcNAc transferase (OGT) glycosylates a diverse range of intracellular proteins with O-linked N-acetylglucosamine (O-GlcNAc), an essential and dynamic post-translational modification in metazoans. Although this enzyme modifies hundreds of proteins with O-GlcNAc, it is not understood how OGT achieves substrate specificity. In this study, we describe the application of a high-throughput OGT assay to a library of peptides. We mapped sites of O-GlcNAc modification by electron transfer dissociation MS and found that they correlate with previously detected O-GlcNAc sites. Crystal structures of four acceptor peptides in complex with Homo sapiens OGT suggest that a combination of size and conformational restriction defines sequence specificity in the -3 to +2 subsites. This work reveals that although the N-terminal TPR repeats of OGT may have roles in substrate recognition, the sequence restriction imposed by the peptide-binding site makes a substantial contribution to O-GlcNAc site specificity.


    Organizational Affiliation

    MRC Protein Phosphorylation and Ubiquitylation Unit and College of Life Sciences, University of Dundee, Dundee, UK.,Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit
A
723Homo sapiensMutation(s): 0 
Gene Names: OGT
EC: 2.4.1.255
Find proteins for O15294 (Homo sapiens)
Go to Gene View: OGT
Go to UniProtKB:  O15294
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Retinoblastoma-like protein 2
C
8Homo sapiensMutation(s): 0 
Gene Names: RBL2 (RB2)
Find proteins for Q08999 (Homo sapiens)
Go to Gene View: RBL2
Go to UniProtKB:  Q08999
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
12V
Query on 12V

Download SDF File 
Download CCD File 
A
(2S,3R,4R,5S,6R)-3-(acetylamino)-4,5-dihydroxy-6-(hydroxymethyl)tetrahydro-2H-thiopyran-2-yl [(2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl dihydrogen diphosphate
URIDINE DIPHOSPHO-5-THIO-N-ACETYLGLUCOSAMINE
C17 H27 N3 O16 P2 S
JPRVHSQHWXZSNC-UBDZBXRQSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • Space Group: F 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 138.527α = 90.00
b = 151.611β = 90.00
c = 200.429γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
XDSdata reduction
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-08-12
    Type: Database references
  • Version 1.2: 2015-09-16
    Type: Database references