Searching. Please wait…
1446
37
174
31614
4642
2689
362
417
Abstract: Deposition of additional plasma membrane and cargoes during cytokinesis in eukaryotic cells must be coordinated with actomyosin ring contraction, plasma membrane ingression and extracellular matrix remodelling. The process by which the secretory pathway promotes specific incorporation of key factors into the cytokinetic machinery is poorly understood. Here, we show that cell polarity protein Spa2 interacts with actomyosin ring components during cytokinesis. Spa2 directly binds to cytokinetic factors Cyk3 and Hof1. The lethal effects of deleting the SPA2 gene in the absence of either Cyk3 or Hof1 can be suppressed by expression of the hypermorphic allele of the essential chitin synthase II (Chs2), a transmembrane protein transported on secretory vesicles that makes the primary septum during cytokinesis. Spa2 also interacts directly with the chitin synthase Chs2. Interestingly, artificial incorporation of Chs2 into the cytokinetic machinery allows the localisation of Spa2 at the site of division. In addition, increased Spa2 protein levels promote Chs2 incorporation at the site of division and primary septum formation. Our data indicate that Spa2 is recruited to the cleavage site to co-operate with the secretory vesicle system and particular actomyosin ring components to promote the incorporation of Chs2 into the so-called 'ingression progression complexes' during cytokinesis in budding yeast.
Fuente: PLoS Genet. 2018 Mar 30;14(3):e1007299
Publisher: Public Library of Science
Publication date: 01/03/2018
No. of pages: 32
Publication type: Article
DOI: 10.1371/journal.pgen.1007299
ISSN: 1553-7390,1553-7404
Spanish project: BFU2011-23193
Publication Url: https://dx.doi.org/10.1371/journal.pgen.1007299
Google Scholar
Citations
UCrea Repository Read publication
MAGDALENA MARIA FOLTMAN
YASMINA FILALI-MOUNCEF LAZCANO
DAMASO CRESPO SANTIAGO
ALBERTO SANCHEZ DIAZ
Back