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Structure of the DASH/Dam1 complex shows its role at the yeast kinetochore-microtubule interface

Journal Article · · Science
 [1];  [2]
  1. Harvard Medical School, Boston, MA (United States)
  2. Harvard Medical School, Boston, MA (United States); Howard Hughes Medical Inst., Chevy Chase, MD (United States)
Kinetochores connect mitotic-spindle microtubules with chromosomes, allowing microtubule depolymerization to pull chromosomes apart during anaphase while resisting detachment as the microtubule shortens. The heterodecameric DASH/Dam1 complex (DASH/Dam1c), an essential component of yeast kinetochores, assembles into a microtubule-encircling ring. The ring associates with rodlike Ndc80 complexes to organize the kinetochore-microtubule interface. Here, we report the cryo–electron microscopy structure (at ~4.5-angstrom resolution) of a DASH/Dam1c ring and a molecular model of its ordered components, validated by evolutionary direct-coupling analysis. Integrating this structure with that of the Ndc80 complex and with published interaction data yields a molecular picture of kinetochore-microtubule attachment, including how flexible, C-terminal extensions of DASH/Dam1c subunits project and contact widely separated sites on the Ndc80 complex rod and how phosphorylation at previously identified sites might regulate kinetochore assembly.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
Damon Runyon Cancer Research Foundation; National Institute of Health (NIH); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1438840
Journal Information:
Science, Journal Name: Science Journal Issue: 6388 Vol. 360; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (5)

Electron cryotomography analysis of Dam1C/DASH at the kinetochore–spindle interface in situ journal November 2018
The stoichiometry of the outer kinetochore is modulated by microtubule-proximal regulatory factors journal May 2019
Extensive loss of cell-cycle and DNA repair genes in an ancient lineage of bipolar budding yeasts journal May 2019
Outer kinetochore protein Dam1 promotes centromere clustering in parallel with Slk19 in budding yeast journal March 2019
Glucose Signaling Is Connected to Chromosome Segregation Through Protein Kinase A Phosphorylation of the Dam1 Kinetochore Subunit in Saccharomyces   cerevisiae journal December 2018

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