JCB logo
amgmicro.com
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

This Article
Right arrow Full Text (PDF, 633K)
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 Field, C
Right arrow Articles by Schekman, R
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Field, C
Right arrow Articles by Schekman, R
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

The Journal of Cell Biology, Vol 86, 123-128, Copyright © 1980 by The Rockefeller University Press


Articles

Localized secretion of acid phosphatase reflects the pattern of cell surface growth in saccharomyces cerevisiae



C Field and R Schekman

Secretion of cell wall-bound acid phosphatase by Saccharomyces cerevisiae occurs along a restricted portion of the cell surface. Acid phosphatase activity produced during derepressed synthesis on a phosphate-limited growth medium is detected with an enzyme-specific stain and is localized initially to the bud portion of a dividing cell. After two to three generations of phosphate-limited growth, most of the cells can be stained; if further phosphatase synthesis is repressed by growth in excess phosphate, dividing cells are produced in which the parent but not the bud can be stained.

Budding growth is interrupted in alpha -mating-type cells by a pheromone (alpha -factor) secreted by the opposite mating type; cell surface growth continues in the presence of alpha -factor and produces a characteristic cell tip. When acid phosphatase synthesis is initiated during alpha -factor treatment, only the cell tip can br stained; when phosphate synthesis is repressed during alpha -factor treatment, the cell body but not the tip can be stained. A mixture of derepressed alpha cells and phosphatase-negative alpha cells form zygotes in which mainly one parent cell surface can be stained.

The cell cycle mutant, cdc 24 (Hartwell, L.H. 1971. Exp. Cell Res. 69:265-276), fails to bud and, instead, expands symmetrically as a sphere at a nonpermissive temperature (37 degrees C). This mutant does not form a cell tip during alpha -factor treatment at 37 degrees C, and although acid phosphatade secretion occurs at this temperature, it is not localized. These results suggest that secretion reflects a polar mode of yeast cell- surface growth, and that this organization requires the cdc 24 gene product.


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 Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:



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