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PXD024084

PXD024084 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleAutocatalytic activation of a malarial egress protease is druggable and requires a protein cofactor
DescriptionMalaria parasite egress from host erythrocytes (RBCs) is regulated by discharge of a parasite serine protease called SUB1 into the parasitophorous vacuole (PV). There, SUB1 activates a PV-resident cysteine protease called SERA6, enabling host RBC rupture through SERA6-mediated degradation of the RBC cytoskeleton protein beta-spectrin. Here we show that activation of Plasmodium falciparum SERA6 involves a second, autocatalytic step that is triggered by SUB1 cleavage. Unexpectedly, autoproteolytic maturation of SERA6 requires interaction in multimolecular complexes with a distinct PV-located protein cofactor, MSA180, that is itself a SUB1 substrate. Genetic ablation of MSA180 mimics SERA6 disruption, producing a fatal block in beta-spectrin cleavage and RBC rupture. Drug-like inhibitors of SERA6 autoprocessing similarly prevent beta-spectrin cleavage and egress in both P. falciparum and the emerging zoonotic pathogen P. knowlesi. Our results elucidate the egress pathway and identify SERA6 as a target for a new class of antimalarial drugs designed to prevent disease progression.
HostingRepositoryPRIDE
AnnounceDate2021-03-16
AnnouncementXMLSubmission_2021-03-16_06:42:51.840.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterSteven Howell
SpeciesList scientific name: Plasmodium falciparum 3D7; NCBI TaxID: 36329;
ModificationListmonohydroxylated residue; iodoacetamide derivatized residue
InstrumentOrbitrap Fusion Lumos
Dataset History
RevisionDatetimeStatusChangeLog Entry
02021-02-09 07:15:59ID requested
12021-03-16 06:42:52announced
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: Malaria, protease, SUB1, SERA6, LC-MSMS
Contact List
Mike Blackman
contact affiliationSenior Group Leader Malaria Biochemistry Laboratory Francis Crick Institute London NW1 1AT
contact emailMike.Blackman@crick.ac.uk
lab head
Steven Howell
contact affiliationFrancis Crick Institute
contact emailsteven.howell@crick.ac.uk
dataset submitter
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Dataset FTP location
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PRIDE project URI
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