Plo1 phosphorylates Dam1 to promote chromosome bi-orientation in fission yeast | Zendy

Graham J. Buttrick | Zendy; Theresa C. Lancaster | Zendy; John C. Meadows | Zendy; Jonathan Millar | Zendy

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Plo1 phosphorylates Dam1 to promote chromosome bi-orientation in fission yeast

Author(s) -

Graham J. Buttrick,

Theresa C. Lancaster,

John C. Meadows,

Jonathan Millar

Publication year - 2012

Publication title -

journal of cell science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.384

H-Index - 278

eISSN - 1477-9137

pISSN - 0021-9533

DOI - 10.1242/jcs.096826

Subject(s) - kinetochore , biology , microbiology and biotechnology , chromosome segregation , spindle pole body , prometaphase , spindle apparatus , aurora b kinase , microtubule , metaphase , genetics , chromosome , cell division , gene , cell

The fungal-specific heterodecameric outer kinetochore DASH complex facilitates the interaction of kinetochores with spindle microtubules. In budding yeast, where kinetochores bind a single microtubule, the DASH complex is essential, and phosphorylation of Dam1 by the Aurora kinase homologue, Ipl1, causes detachment of kinetochores from spindle microtubules. We demonstrate that in the distantly related fission yeast, where the DASH complex is not essential for viability and kinetochores bind multiple microtubules, Dam1 is instead phosphorylated on serine 143 by the Polo kinase homologue, Plo1, during prometaphase and metaphase. This phosphorylation site is conserved in most fungal Dam1 proteins, including budding yeast Dam1. We show that Dam1 phosphorylation by Plo1 is dispensable for DASH assembly and chromosome retrieval but instead aids tension-dependent chromosome bi-orientation.

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