Implications of alternative routes to APC/C inhibition by the mitotic checkpoint complex

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dc.contributor.authorGross, Fridolinen
dc.contributor.authorBonaiuti, Paoloen
dc.contributor.authorHauf, Silkeen
dc.contributor.authorCiliberto, Andreaen
dc.contributor.departmentBiological Sciencesen
dc.contributor.departmentFralin Life Sciences Instituteen
dc.date.accessioned2018-09-28T14:02:02Zen
dc.date.available2018-09-28T14:02:02Zen
dc.date.issued2018-09-10en
dc.description.abstractThe mitotic checkpoint (also called spindle assembly checkpoint) is a signaling pathway that ensures faithful chromosome segregation. Mitotic checkpoint proteins inhibit the anaphase-promoting complex (APC/C) and its activator Cdc20 to prevent precocious anaphase. Checkpoint signaling leads to a complex of APC/C, Cdc20, and checkpoint proteins, in which the APC/C is inactive. In principle, this final product of the mitotic checkpoint can be obtained via different pathways, whose relevance still needs to be fully ascertained experimentally. Here, we use mathematical models to compare the implications on checkpoint response of the possible pathways leading to APC/C inhibition. We identify a previously unrecognized funneling effect for Cdc20, which favors Cdc20 incorporation into the inhibitory complex and therefore promotes checkpoint activity. Furthermore, we find that the presence or absence of one specific assembly reaction determines whether the checkpoint remains functional at elevated levels of Cdc20, which can occur in cancer cells. Our results reveal the inhibitory logics behind checkpoint activity, predict checkpoint efficiency in perturbed situations, and could inform molecular strategies to treat malignancies that exhibit Cdc20 overexpression.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1371/journal.pcbi.1006449en
dc.identifier.issue9en
dc.identifier.othere1006449en
dc.identifier.urihttp://hdl.handle.net/10919/85188en
dc.identifier.volume14en
dc.language.isoenen
dc.publisherPLOSen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleImplications of alternative routes to APC/C inhibition by the mitotic checkpoint complexen
dc.title.serialPLOS Computational Biologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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