1W3B

The superhelical TPR domain of O-linked GlcNAc transferase reveals structural similarities to importin alpha.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Superhelical Tpr-Repeat Domain of O-Linked Glcnac Transferase Exhibits Structural Similarities to Importin Alpha

Jinek, M.Rehwinkel, J.Lazarus, B.D.Izaurralde, E.Hanover, J.A.Conti, E.

(2004) Nat.Struct.Mol.Biol. 11: 1001

  • DOI: 10.1038/nsmb833

  • PubMed Abstract: 
  • Addition of N-acetylglucosamine (GlcNAc) is a ubiquitous form of intracellular glycosylation catalyzed by the conserved O-linked GlcNAc transferase (OGT). OGT contains an N-terminal domain of tetratricopeptide (TPR) repeats that mediates the recognit ...

    Addition of N-acetylglucosamine (GlcNAc) is a ubiquitous form of intracellular glycosylation catalyzed by the conserved O-linked GlcNAc transferase (OGT). OGT contains an N-terminal domain of tetratricopeptide (TPR) repeats that mediates the recognition of a broad range of target proteins. Components of the nuclear pore complex are major OGT targets, as OGT depletion by RNA interference (RNAi) results in the loss of GlcNAc modification at the nuclear envelope. To gain insight into the mechanism of target recognition, we solved the crystal structure of the homodimeric TPR domain of human OGT, which contains 11.5 TPR repeats. The repeats form an elongated superhelix. The concave surface of the superhelix is lined by absolutely conserved asparagines, in a manner reminiscent of the peptide-binding site of importin alpha. Based on this structural similarity, we propose that OGT uses an analogous molecular mechanism to recognize its targets.


    Organizational Affiliation

    Structural and Computational Biology, European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117 Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UDP-N-ACETYLGLUCOSAMINE--PEPTIDE N-ACETYLGLUCOSAMINYLTRANSFERASE 110
A, B
388Homo 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
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.259 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 64.320α = 105.08
b = 75.510β = 105.14
c = 77.670γ = 110.28
Software Package:
Software NamePurpose
XDSdata scaling
SOLVEphasing
CNSrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance