Our hosting provider is investigating network issues. We apologize for the inconvenience.

Searching across hundreds of databases

Our searching services are busy right now. Your search will reload in five seconds.

X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

A novel role of the budding yeast separin Esp1 in anaphase spindle elongation: evidence that proper spindle association of Esp1 is regulated by Pds1.

In Saccharomyces cerevisiae, the metaphase-anaphase transition is initiated by the anaphase-promoting complex-dependent degradation of Pds1, whereby Esp1 is activated to promote sister chromatid separation. Although this is a fundamental step in the cell cycle, little is known about the regulation of Esp1 and how loss of cohesion is coordinated with movement of the anaphase spindle. Here, we show that Esp1 has a novel role in promoting anaphase spindle elongation. The localization of Esp1 to the spindle apparatus, analyzed by live cell imaging, is regulated in a manner consistent with a function during anaphase B. The protein accumulates in the nucleus in G2 and is mobilized onto the spindle pole bodies and spindle midzone at anaphase onset, where it persists into midanaphase. Association with Pds1 occurs during S phase and is required for efficient nuclear targeting of Esp1. Spindle association is not fully restored in pds1 mutants expressing an Esp1-nuclear localization sequence fusion protein, suggesting that Pds1 is also required to promote Esp1 spindle binding. In agreement, Pds1 interacts with the spindle at the metaphase-anaphase transition and a fraction remains at the spindle pole bodies and the spindle midzone in anaphase cells. Finally, mutational analysis reveals that the conserved COOH-terminal region of Esp1 is important for spindle interaction.

Pubmed ID: 11149918 RIS Download

Mesh terms: Anaphase | Binding Sites | Biological Transport | Calcium | Cell Cycle | Cell Cycle Proteins | Cell Nucleus | Endopeptidases | Fungal Proteins | Nuclear Proteins | Saccharomyces cerevisiae | Saccharomyces cerevisiae Proteins | Securin | Separase | Spindle Apparatus

Research resources used in this publication

None found

Research tools detected in this publication

Data used in this publication

None found

Associated grants

  • Agency: NIGMS NIH HHS, Id: R01 GM038328
  • Agency: NIGMS NIH HHS, Id: R37 GM038328
  • Agency: NIGMS NIH HHS, Id: GM38238

Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.

This is a list of tools and resources that we have found mentioned in this publication.


Human Frontier Science Program

The HFSP supports novel, innovative and interdisciplinary basic research focused on the complex mechanisms of living organisms; topics range from molecular and cellular approaches to systems and cognitive neuroscience. A clear emphasis is placed on novel collaborations that bring biologists together with scientists from fields such as physics, mathematics, chemistry, computer science and engineering to focus on problems at the frontier of the life sciences. The Trust provides funding for research regarding complex biological systems. It offers research grants, post doc fellowships, career development fellowships, and short- long- and cross- disciplinary fellowships. HFSP funding programs are strictly project-related and begin at the postdoctoral level. We have no support for PhD students nor for travel grants to scientific meetings. Nor do we provide sponsorship or funds to organizers of scientific meetings. Research Grants Research Grants are awarded for novel collaborations involving extensive collaboration among teams of scientists working in different countries and in different disciplines. Two types of grants are available: Young Investigators Grants and Program Grants. Postdoctoral Fellowships Postdoctoral Fellowships are available for scientists who wish to work in foreign laboratories, with emphasis on individuals early in their careers who wish to obtain training in a different field of research. Fellows who return to their home countries or move to an HFSP member country that is different from the Fellowship host country are eligible to apply for a Career Development Award. Long-Term Fellowships are for scientists with a Ph.D. degree in the life sciences who wish to broaden their experience through postdoctoral training abroad. Cross-Disciplinary Fellowships are intended for postdoctoral fellows with a Ph.D. degree in the physical sciences, chemistry, mathematics, engineering and computer sciences who wish to receive training in biology. Career Development Awards Career Development Awards are for former HFSP Long-Term or Cross-Disciplinary Fellows who return to their home country or move to an HFSP member country that is different from the host country of their HFSP Fellowship. The award provides support for initiating the fellows'' first independent laboratory.

tool

View all literature mentions