7Z07

Solution NMR structure of N-acetylglucosaminyltransferase V (GnTV) G26P mutant TMD


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 50 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Helical stability of the GnTV transmembrane domain impacts on SPPL3 dependent cleavage.

Papadopoulou, A.A.Stelzer, W.Silber, M.Schlosser, C.Spitz, C.Haug-Kroper, M.Straub, T.Muller, S.A.Lichtenthaler, S.F.Muhle-Goll, C.Langosch, D.Fluhrer, R.

(2022) Sci Rep 12: 20987-20987

  • DOI: https://doi.org/10.1038/s41598-022-24772-8
  • Primary Citation of Related Structures:  
    7YYI, 7Z07, 7Z08, 7Z0B

  • PubMed Abstract: 

    Signal-Peptide Peptidase Like-3 (SPPL3) is an intramembrane cleaving aspartyl protease that causes secretion of extracellular domains from type-II transmembrane proteins. Numerous Golgi-localized glycosidases and glucosyltransferases have been identified as physiological SPPL3 substrates. By SPPL3 dependent processing, glycan-transferring enzymes are deactivated inside the cell, as their active site-containing domain is cleaved and secreted. Thus, SPPL3 impacts on glycan patterns of many cellular and secreted proteins and can regulate protein glycosylation. However, the characteristics that make a substrate a favourable candidate for SPPL3-dependent cleavage remain unknown. To gain insights into substrate requirements, we investigated the function of a GxxxG motif located in the transmembrane domain of N-acetylglucosaminyltransferase V (GnTV), a well-known SPPL3 substrate. SPPL3-dependent secretion of the substrate's ectodomain was affected by mutations disrupting the GxxxG motif. Using deuterium/hydrogen exchange and NMR spectroscopy, we studied the effect of these mutations on the helix flexibility of the GnTV transmembrane domain and observed that increased flexibility facilitates SPPL3-dependent shedding and vice versa. This study provides first insights into the characteristics of SPPL3 substrates, combining molecular biology, biochemistry, and biophysical techniques and its results will provide the basis for better understanding the characteristics of SPPL3 substrates with implications for the substrates of other intramembrane proteases.


  • Organizational Affiliation

    Biochemistry and Molecular Biology, Institute of Theoretical Medicine, Faculty of Medicine, University of Augsburg, Universitätstrasse 2, 86159, Augsburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-1,6-mannosylglycoprotein 6-beta-N-acetylglucosaminyltransferase A29Homo sapiensMutation(s): 1 
EC: 2.4.1.155
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q09328 (Homo sapiens)
Explore Q09328 
Go to UniProtKB:  Q09328
PHAROS:  Q09328
GTEx:  ENSG00000152127 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ09328
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 50 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyFOR2290

Revision History  (Full details and data files)

  • Version 1.0: 2022-12-28
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Data collection, Database references