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PXD029746-2

PXD029746 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleThe human disease gene TMEM251 is essential for lysosomal transport and viral infection
DescriptionAfter gaining access to the endo-lysosomal pathway, several viruses depend on lysosomal cathepsin proteases to cleave their structural proteins triggering productive entry. Targeting of cathepsins and other luminal lysosomal proteins to lysosomes requires their modification with mannose 6-phosphate (M6P) signals. Key to M6P tagging is N-acetylglucosamine (GlcNAc)-1-phosphotransferase whose deficiency leads to the severe lysosomal storage disorder mucolipidosis II (MLII). Here, using genome-scale CRISPR screens, we identify the transmembrane protein TMEM251 as critically important for viral infection by cathepsin-dependent viruses including reovirus, Ebola virus, and SARS-CoV-2. We demonstrate that Golgi-resident TMEM251 is essential for lysosomal sorting and activity of cathepsins. Mechanistically, we show that TMEM251 deficiency in human cells results in global loss of M6P on luminal lysosomal proteins by destabilizing GlcNAc-1-phosphotransferase. Tmem251 knockout mice reveal characteristics typical of MLII including hypersecretion of lysosomal enzymes and accumulation of lysosomal storage material in isolated fibroblasts. Finally, we demonstrate that human pathogenic TMEM251 alleles fail to rescue lysosomal sorting defects in knockout cells. Our results uncover a crucial role of TMEM251 in M6P-dependent lysosomal transport and viral infection. Overall, work here reveals the biochemical basis of an inherited MLII-like disease caused by mutations in TMEM251 and provides insights into infection mechanisms of a broad class of medically important viruses.
HostingRepositoryPRIDE
AnnounceDate2023-11-14
AnnouncementXMLSubmission_2023-11-14_08:54:12.883.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterNicholas Riley
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListcomplex glycosylation
InstrumentOrbitrap Fusion
Dataset History
RevisionDatetimeStatusChangeLog Entry
02021-11-15 06:35:05ID requested
12022-09-09 10:27:25announced
22023-11-14 08:54:13announced2023-11-14: Updated project metadata.
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: glycoproteomics,Mannose-6-phosphate
Contact List
Jan Carette
contact affiliationDepartment of Microbiology and Immunology, Stanford University
contact emailcarette@stanford.edu
lab head
Nicholas Riley
contact affiliationStanford University
contact emailriley.nicholasm@gmail.com
dataset submitter
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Dataset FTP location
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