5A01

O-GlcNAc transferase from Drososphila melanogaster


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Dual functionality of O-GlcNAc transferase is required for Drosophila development.

Mariappa, D.Zheng, X.Schimpl, M.Raimi, O.Ferenbach, A.T.Muller, H.A.van Aalten, D.M.

(2015) Open Biol 5: 150234-150234

  • DOI: https://doi.org/10.1098/rsob.150234
  • Primary Citation of Related Structures:  
    5A01

  • PubMed Abstract: 

    Post-translational modification of intracellular proteins with O-linked N-acetylglucosamine (O-GlcNAc) catalysed by O-GlcNAc transferase (OGT) has been linked to regulation of diverse cellular functions. OGT possesses a C-terminal glycosyltransferase catalytic domain and N-terminal tetratricopeptide repeats that are implicated in protein-protein interactions. Drosophila OGT (DmOGT) is encoded by super sex combs (sxc), mutants of which are pupal lethal. However, it is not clear if this phenotype is caused by reduction of O-GlcNAcylation. Here we use a genetic approach to demonstrate that post-pupal Drosophila development can proceed with negligible OGT catalysis, while early embryonic development is OGT activity-dependent. Structural and enzymatic comparison between human OGT (hOGT) and DmOGT informed the rational design of DmOGT point mutants with a range of reduced catalytic activities. Strikingly, a severely hypomorphic OGT mutant complements sxc pupal lethality. However, the hypomorphic OGT mutant-rescued progeny do not produce F2 adults, because a set of Hox genes is de-repressed in F2 embryos, resulting in homeotic phenotypes. Thus, OGT catalytic activity is required up to late pupal stages, while further development proceeds with severely reduced OGT activity.


  • Organizational Affiliation

    MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
O-GLYCOSYLTRANSFERASE
A, B, C
710Drosophila melanogasterMutation(s): 1 
EC: 2.4 (PDB Primary Data), 2.4.1 (PDB Primary Data), 2.4.1.255 (PDB Primary Data)
UniProt
Find proteins for Q7KJA9 (Drosophila melanogaster)
Explore Q7KJA9 
Go to UniProtKB:  Q7KJA9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7KJA9
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
12V
Query on 12V

Download Ideal Coordinates CCD File 
D [auth A],
E [auth B],
F [auth C]
(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
C17 H27 N3 O16 P2 S
JPRVHSQHWXZSNC-UBDZBXRQSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.946α = 90
b = 160.946β = 90
c = 77.189γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2017-03-22
    Changes: Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description