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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1098/rsob.150234

  • 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 ...

    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

    Division of Molecular Microbiology, University of Dundee, Dundee, UK.,MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK.,MRC Protein Phosphorylation and Ubiquitylation Unit, University of Dundee, Dundee, UK Division of Molecular Microbiology, University of Dundee, Dundee, UK dmfvanaalten@dundee.ac.uk.,Division of Cell and Developmental Biology, College of Life Sciences, University of Dundee, Dundee, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
O-GLYCOSYLTRANSFERASE
A, B, C
710Drosophila melanogasterMutation(s): 1 
Gene Names: sxc (BcDNA:GH04245, CG10392-RC, Dmel\CG10392, DmOGT, dO-GnT, l(2)02637, l(2)NC130, OGT, Ogt, ogt, P1201, SXC, Sxc)
EC: 2.4.-.-, 2.4.1.255
Find proteins for Q7KJA9 (Drosophila melanogaster)
Go to UniProtKB:  Q7KJA9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
12V
Query on 12V

Download SDF File 
Download CCD File 
A, B, 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
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: 2.66 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 160.946α = 90.00
b = 160.946β = 90.00
c = 77.189γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALAdata scaling
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2017-03-22
    Type: Database references