3PE4

Structure of human O-GlcNAc transferase and its complex with a peptide substrate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of human O-GlcNAc transferase and its complex with a peptide substrate.

Lazarus, M.B.Nam, Y.Jiang, J.Sliz, P.Walker, S.

(2011) Nature 469: 564-567

  • DOI: 10.1038/nature09638
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The essential mammalian enzyme O-linked β-N-acetylglucosamine transferase (O-GlcNAc transferase, here OGT) couples metabolic status to the regulation of a wide variety of cellular signalling pathways by acting as a nutrient sensor. OGT catalyses the ...

    The essential mammalian enzyme O-linked β-N-acetylglucosamine transferase (O-GlcNAc transferase, here OGT) couples metabolic status to the regulation of a wide variety of cellular signalling pathways by acting as a nutrient sensor. OGT catalyses the transfer of N-acetylglucosamine from UDP-N-acetylglucosamine (UDP-GlcNAc) to serines and threonines of cytoplasmic, nuclear and mitochondrial proteins, including numerous transcription factors, tumour suppressors, kinases, phosphatases and histone-modifying proteins. Aberrant glycosylation by OGT has been linked to insulin resistance, diabetic complications, cancer and neurodegenerative diseases including Alzheimer's. Despite the importance of OGT, the details of how it recognizes and glycosylates its protein substrates are largely unknown. We report here two crystal structures of human OGT, as a binary complex with UDP (2.8 Å resolution) and as a ternary complex with UDP and a peptide substrate (1.95 Å). The structures provide clues to the enzyme mechanism, show how OGT recognizes target peptide sequences, and reveal the fold of the unique domain between the two halves of the catalytic region. This information will accelerate the rational design of biological experiments to investigate OGT's functions; it will also help the design of inhibitors for use as cellular probes and help to assess its potential as a therapeutic target.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit
A, C
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
Casein kinase II subunit alpha
B, D
14Homo sapiensMutation(s): 0 
Gene Names: CSNK2A1 (CK2A1)
EC: 2.7.11.1
Find proteins for P68400 (Homo sapiens)
Go to Gene View: CSNK2A1
Go to UniProtKB:  P68400
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
UDP
Query on UDP

Download SDF File 
Download CCD File 
A, C
URIDINE-5'-DIPHOSPHATE
C9 H14 N2 O12 P2
XCCTYIAWTASOJW-XVFCMESISA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UDPIC50: 1800 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.224 
  • Space Group: I 1 2 1
  • Diffraction Data DOI: 
    10.15785/SBGRID/190 SBGrid
Unit Cell:
Length (Å)Angle (°)
a = 98.600α = 90.00
b = 136.700β = 102.90
c = 153.500γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
ADSCdata collection
iMOSFLMdata reduction
SCALAdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-01-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance