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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lechler, T. Li, R. |
| Description | Author Affiliation: Lechler T ( Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.) |
| Abstract | We have developed a biochemical approach for identifying the components of cortical actin assembly sites in polarized yeast cells, based on a permeabilized cell assay that we established for actin assembly in vitro. Previous analysis indicated that an activity associated with the cell cortex promotes actin polymerization in the bud. After inactivation by a chemical treatment, this activity can be reconstituted back to the permeabilized cells from a cytoplasmic extract. Fractionation of the extract revealed that the reconstitution depends on two sequentially acting protein factors. Bee1, a cortical actin cytoskeletal protein with sequence homology to Wiskott-Aldrich syndrome protein, is required for the first step of the reconstitution. This finding, together with the severe defects in actin organization associated with the bee1 null mutation, indicates that Bee1 protein plays a direct role in controlling actin polymerization at the cell cortex. The factor that acts in the second step of the reconstitution has been identified by conventional chromatography. It is composed of a novel protein, Pca1. Sequence analysis suggests that Pca1 has the potential to interact with SH3 domain-containing proteins and phospholipids. |
| ISSN | 00219525 |
| e-ISSN | 15408140 |
| Journal | The Journal of Cell Biology |
| Issue Number | 1 |
| Volume Number | 138 |
| Language | English |
| Publisher | Rockefeller University Press (United States) |
| Publisher Date | 1997-07-14 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Actins Metabolism Cytoskeletal Proteins Fungal Proteins Saccharomyces Cerevisiae Proteins Saccharomyces Cerevisiae Adenosine Triphosphatases Amino Acid Sequence Animals Binding Sites Cation Transport Proteins Cytoplasm Genetics Mice Microfilament Proteins Molecular Sequence Data Drug Effects Sequence Homology, Amino Acid Urea Pharmacology Wiskott-Aldrich Syndrome Protein Research Support, Non-U.S. Gov't Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Medicine |
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