Subunit organization in the Dam1 kinetochore complex and its ring around microtubules
Journal Article
·
· Molecular Biology of the Cell
- Univ. of California, Berkeley, CA (United States). Biophysics Graduate Group; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Life Science Division; DOE/OSTI
- Univ. of California, Berkeley, CA (United States). Biophysics Graduate Group
- Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.
- Univ. of California, Berkeley, CA (United States). Molecular and Cell Biology Dept.
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Life Science Division; Univ. of California, Berkeley, CA (United States). Molecular and Cell Biology Dept.; Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.
All eukaryotic cells must segregate their chromosomes equally between two daughter cells at each division. This process needs to be robust, as errors in the form of loss or gain of genetic material have catastrophic effects on viability. Chromosomes are captured, aligned, and segregated to daughter cells via interaction with spindle microtubules mediated by the kinetochore. In Saccharomyces cerevisiae one microtubule attaches to each kinetochore, requiring extreme processivity from this single connection. The yeast Dam1 complex, an essential component of the outer kinetochore, forms rings around microtubules and in vitro recapitulates much of the functionality of a kinetochore–microtubule attachment. To understand the mechanism of the Dam1 complex at the kinetochore, we must know how it binds to microtubules, how it assembles into rings, and how assembly is regulated. We used electron microscopy to map several subunits within the structure of the Dam1 complex and identify the organization of Dam1 complexes within the ring. Of importance, new data strongly support a more passive role for the microtubule in Dam1 ring formation. Integrating this information with previously published data, we generated a structural model for the Dam1 complex assembly that advances our understanding of its function and will direct future experiments.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1625227
- Journal Information:
- Molecular Biology of the Cell, Journal Name: Molecular Biology of the Cell Journal Issue: 22 Vol. 22; ISSN 1059-1524
- Publisher:
- American Society for Cell BiologyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Molecular requirements for the formation of a kinetochore–microtubule interface by Dam1 and Ndc80 complexes
Structure of the DASH/Dam1 complex shows its role at the yeast kinetochore-microtubule interface
Fission yeast dam1-A8 mutant is resistant to and rescued by an anti-microtubule agent
Journal Article
·
Sun Dec 30 19:00:00 EST 2012
· Journal of Cell Biology
·
OSTI ID:1625166
Structure of the DASH/Dam1 complex shows its role at the yeast kinetochore-microtubule interface
Journal Article
·
Thu May 03 20:00:00 EDT 2018
· Science
·
OSTI ID:1438840
Fission yeast dam1-A8 mutant is resistant to and rescued by an anti-microtubule agent
Journal Article
·
Fri Apr 11 00:00:00 EDT 2008
· Biochemical and Biophysical Research Communications
·
OSTI ID:21043703