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Functions of the Dictyostelium LIMP-2 and CD36 homologues in bacteria uptake, phagolysosome biogenesis and host cell defence

dc.contributor.authorSATTLER, N.
dc.contributor.authorBOSMANI, C.
dc.contributor.authorBARISCH, C.
dc.contributor.authorGUEHO, A.
dc.contributor.authorGOPALDASS, N.
hal.structure.identifierDep. Quimica [CFMC-UL]
hal.structure.identifierDepartamento de Engenharia de Materiais
dc.contributor.authorDIAS, M.
dc.contributor.authorLEUBA, F.
hal.structure.identifierLaboratoire des matériaux et du génie physique [LMGP ]
dc.contributor.authorBRUCKERT, F.
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorCOSSON, P.
hal.structure.identifierInstitut de biologie et chimie des protéines [Lyon] [IBCP]
dc.contributor.authorSOLDATI, T.
dc.date.issued2018
dc.identifier.issn0021-9533
dc.description.abstractEnPhagocytic cells take up, kill and digest microbes by a process called phagocytosis. To this end, these cells bind the particle, rearrange their actin cytoskeleton, and orchestrate transport of digestive factors to the particle-containing phagosome. The mammalian lysosomal membrane protein LIMP-2 (also known as SCARB2) and CD36, members of the class B of scavenger receptors, play a crucial role in lysosomal enzyme trafficking and uptake of mycobacteria, respectively, and generally in host cell defences against intracellular pathogens. Here, we show that the Dictyostelium discoideum LIMP-2 homologue LmpA regulates phagocytosis and phagolysosome biogenesis. The lmpA knockdown mutant is highly affected in actin-dependent processes, such as particle uptake, cellular spreading and motility. Additionally, the cells are severely impaired in phagosomal acidification and proteolysis, likely explaining the higher susceptibility to infection with the pathogenic bacterium Mycobacterium marinum, a close cousin of the human pathogen Mycobacterium tuberculosis. Furthermore, we bring evidence that LmpB is a functional homologue of CD36 and specifically mediates uptake of mycobacteria. Altogether, these data indicate a role for LmpA and LmpB, ancestors of the family of which LIMP-2 and CD36 are members, in lysosome biogenesis and host cell defence.
dc.language.isoen
dc.publisherCompany of Biologists
dc.title.enFunctions of the Dictyostelium LIMP-2 and CD36 homologues in bacteria uptake, phagolysosome biogenesis and host cell defence
dc.typeArticle de revue
dc.identifier.doi10.1242/jcs.218040
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Cell Science
bordeaux.volume131
bordeaux.issue17
bordeaux.peerReviewedoui
hal.identifierhal-01979188
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01979188v1
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