JCB logo
BD Biosciences
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published 31 March 2003. doi:10.1083/jcb.200211126
This Article
Right arrow Full Text
Right arrow PDF (Full Text)
Right arrow PPT slides of all figures
Right arrow Supplemental Material Index
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tasto, J. J.
Right arrow Articles by Gould, K. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tasto, J. J.
Right arrow Articles by Gould, K. L.
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
© The Rockefeller University Press, 0021-9525/2003/3/1093 $5.00
The Journal of Cell Biology, Volume 160, Number 7, 1093-1103


Article

An anillin homologue, Mid2p, acts during fission yeast cytokinesis to organize the septin ring and promote cell separation

Joseph J. Tasto2, Jennifer L. Morrell1,2 and Kathleen L. Gould1,2

1 Howard Hughes Medical Institute, Vanderbilt University School of Medicine, Nashville, TN 37232
2 Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, TN 37232

Address correspondence to Kathleen L. Gould, Vanderbilt University School of Medicine, Department of Cell and Developmental Biology, B2309 MCN, 1161 21st Ave. South, Nashville, TN 37232. Tel.: (615) 343-9502. Fax: (615) 343-0723. E-mail: kathy.gould{at}vanderbilt.edu

Anillin is a conserved protein required for cell division (Field, C.M., and B.M. Alberts. 1995. J. Cell Biol. 131:165–178; Oegema, K., M.S. Savoian, T.J. Mitchison, and C.M. Field. 2000. J. Cell Biol. 150:539–552). One fission yeast homologue of anillin, Mid1p, is necessary for the proper placement of the division site within the cell (Chang, F., A. Woollard, and P. Nurse. 1996. J. Cell Sci. 109(Pt 1):131–142; Sohrmann, M., C. Fankhauser, C. Brodbeck, and V. Simanis. 1996. Genes Dev. 10:2707–2719). Here, we identify and characterize a second fission yeast anillin homologue, Mid2p, which is not orthologous with Mid1p. Mid2p localizes as a single ring in the middle of the cell after anaphase in a septin- and actin-dependent manner and splits into two rings during septation. Mid2p colocalizes with septins, and mid2{Delta} cells display disorganized, diffuse septin rings and a cell separation defect similar to septin deletion strains. mid2 gene expression and protein levels fluctuate during the cell cycle in a sep1- and Skp1/Cdc53/F-box (SCF)–dependent manner, respectively, implying that Mid2p activity must be carefully regulated. Overproduction of Mid2p depolarizes cell growth and affects the organization of both the septin and actin cytoskeletons. In the presence of a nondegradable Mid2p fragment, the septin ring is stabilized and cell cycle progression is delayed. These results suggest that Mid2p influences septin ring organization at the site of cell division and its turnover might normally be required to permit septin ring disassembly.

Key Words: S. pombe; cytokinesis; cell cycle; septin; mid2


The online version of this article includes supplemental material.

* Abbreviations used in this paper: APC, anaphase-promoting complex; LatA, latrunculin A; PEST, Pro/Glu/Ser/Thr; PH, pleckstrin homology; SCF, Skp1/Cdc53/F-box.


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents