PXD036213

PXD036213 is an original dataset announced via ProteomeXchange.

Title	Targeting host O-linked glycan biosynthesis affects Ebola virus replication efficiency and reveals differential GalNAc-T acceptor site preferences on the Ebola virus glycoprotein
Description	Ebola virus glycoprotein is one of the most heavily O-glycosylated viral envelope glycoproteins. The glycoprotein possesses a large mucin-like domain responsible for the cytopathic effect on infected cells, yet its structure or potential role in early entry events is poorly defined. To understand the importance of O-glycans and the individual O-glycosylation sites for viral infectivity, we performed a comprehensive characterization of site-specific glycosylation governed by the three key GalNAc-transferases, GalNAc-T1, -T2, and -T3, initiating O-glycan biosynthesis. Using TMT isobaric labelling we performed quantitative differential O-glycoproteomics on proteins produced in wild type HEK293 cells and cell lines ablated for each of the three GalNAc-Ts, as well as compared it to patterns on wild type virus-like particles. In total we found 38 and 41 O-glycosites on virus like particle-derived and recombinant GP, respectively, with well correlated sites and site-specific structures. Examination of the isoform-specific glycosylation demonstrate selective initiation of a subset of O-glycosites by each enzyme, with GalNAc-T1 having the largest contribution. We next demonstrate that O-linked glycan truncation and perturbed initiation retarded the production of viral particles and decreased infectivity of progeny virus. This work represents a comprehensive site-specific analysis of EBOV GP and sheds light on differential regulation of EBOV GP glycosylation initiated by host GalNAc-Ts. Together with the effect on viral propagation it opens prospective avenues for tailored intervention approaches and means for modulating immunogen O-glycan density.
HostingRepository	PRIDE
AnnounceDate	2024-04-29
AnnouncementXML	Submission_2024-04-29_02:28:36.417.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Sergey Vakhrushev
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	TMT6plex-126 reporter+balance reagent acylated residue; N-acetylhexosaminylated residue; monohydroxylated residue; Hex-HexNAc; deamidated residue; iodoacetamide derivatized residue
Instrument	Orbitrap Fusion Lumos; Orbitrap Fusion

Revision	Datetime	Status	ChangeLog Entry
0	2022-08-22 03:44:01	ID requested
⏵ 1	2024-04-29 02:28:36	announced

10.1128/JVI.00524-24;

submitter keyword: glycoproteomics, O-glycosylation, virus,Ebola

Hans Wandall
contact affiliation	University of Copenhagen, Department of Cellular and Molecular Medicine
contact email	hhw@sund.ku.dk
lab head
Sergey Vakhrushev
contact affiliation	Department of Cellular and Molecular Medicine
contact email	seva@sund.ku.dk
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD036213
     1. Label: PRIDE project
     2. Name: Targeting host O-linked glycan biosynthesis affects Ebola virus replication efficiency and reveals differential GalNAc-T acceptor site preferences on the Ebola virus glycoprotein