Please use this identifier to cite or link to this item: https://doi.org/10.1083/jcb.200303174
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dc.titleDistinct roles of Gαi and Gβ13F subunits of the heterotrimeric G protein complex in the mediation of Drosophila neuroblast asymmetric divisions
dc.contributor.authorYu, F.
dc.contributor.authorCai, Y.
dc.contributor.authorKaushik, R.
dc.contributor.authorYang, X.
dc.contributor.authorChia, W.
dc.date.accessioned2014-11-28T02:50:26Z
dc.date.available2014-11-28T02:50:26Z
dc.date.issued2003-08-18
dc.identifier.citationYu, F., Cai, Y., Kaushik, R., Yang, X., Chia, W. (2003-08-18). Distinct roles of Gαi and Gβ13F subunits of the heterotrimeric G protein complex in the mediation of Drosophila neuroblast asymmetric divisions. Journal of Cell Biology 162 (4) : 623-633. ScholarBank@NUS Repository. https://doi.org/10.1083/jcb.200303174
dc.identifier.issn00219525
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/111855
dc.description.abstractThe asymmetric division of Drosophila neuroblasts involves the basal localization of cell fate determinants and the generation of an asymmetric, apicobasally oriented mitotic spindle that leads to the formation of two daughter cells of unequal size. These features are thought to be controlled by an apically localized protein complex comprising of two signaling pathways: Bazooka/Drosophila atypical PKC/Inscuteable/DmFar6 and Partner of inscuteable (Pins)/Gαi; in addition, Gβ13F is also required. However, the role of Gαi and the hierarchical relationship between the G protein subunits and apical components are not well defined. Here we describe the isolation of Gαi mutants and show that Gαi and Gβ13F play distinct roles. Gαi is required for Pins to localize to the cortex, and the effects of loss of Gαi or pins are highly similar, supporting the idea that Pins/Gαi act together to mediate various aspects of neuroblast asymmetric division. In contrast, Gβ13F appears to regulate the asymmetric localization/stability of all apical components, and Gβ13F loss of function exhibits phenotypes resembling those seen when both apical pathways have been compromised, suggesting that it acts upstream of the apical pathways. Importantly, our results have also revealed a novel aspect of apical complex function, that is, the two apical pathways act redundantly to suppress the formation of basal astral microtubules in neuroblasts.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1083/jcb.200303174
dc.sourceScopus
dc.subjectAstral microtubules
dc.subjectAsymmetric division
dc.subjectDrosophila
dc.subjectHeterotrimeric G proteins
dc.subjectNeuroblast
dc.typeArticle
dc.contributor.departmentINSTITUTE OF MOLECULAR & CELL BIOLOGY
dc.description.doi10.1083/jcb.200303174
dc.description.sourcetitleJournal of Cell Biology
dc.description.volume162
dc.description.issue4
dc.description.page623-633
dc.description.codenJCLBA
dc.identifier.isiut000184910900009
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