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PMID: 11179222 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

The budding yeast proteins Spc24p and Spc25p interact with Ndc80p and Nuf2p at the kinetochore and are important for kinetochore clustering and checkpoint control.

The EMBO journal ·Vol. 20 ·No. 4 ·2001-02-15 ·Pages 777-91

Janke C, Ortiz J, Lechner J, Shevchenko A, Shevchenko A, Magiera MM, Schramm C, Schiebel E

Abstract

Here, we show that the budding yeast proteins Ndc80p, Nuf2p, Spc24p and Spc25p interact at the kinetochore. Consistently, Ndc80p, Nuf2p, Spc24p and Spc25p associate with centromere DNA in chromatin immunoprecipitation experiments, and SPC24 interacts genetically with MCM21 encoding a kinetochore component. Moreover, although conditional lethal spc24-2 and spc25-7 cells form a mitotic spindle, the kinetochores remain in the mother cell body and fail to segregate the chromosomes. Despite this defect in chromosome segregation, spc24-2 and spc25-7 cells do not arrest in metaphase in response to checkpoint control. Furthermore, spc24-2 cells showed a mitotic checkpoint defect when microtubules were depolymerized with nocodazole, indicating that Spc24p has a function in checkpoint control. Since Ndc80p, Nuf2p and Spc24p are conserved proteins, it is likely that similar complexes are part of the kinetochore in other organisms.

MeSH Terms
Amino Acid Sequence Centromere Chromosomes, Fungal DNA, Fungal/metabolism DNA-Binding Proteins/isolation & purification,metabolism Fungal Proteins/isolation & purification,metabolism Kinetochores/metabolism Molecular Sequence Data Protein Binding Sequence Homology, Amino Acid
Chemicals
DNA, Fungal DNA-Binding Proteins Fungal Proteins
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Janke C
The Beatson Institute for Cancer Research, CRC Beatson Laboratories, Glasgow G61 1BD, UK.
Ortiz J
Lechner J
Shevchenko A
Shevchenko A
Magiera M M
Schramm C
Schiebel E
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Article Info
Journal
The EMBO journal
Abbr.
EMBO J
ISSN
0261-4189
DOI
10.1093/emboj/20.4.777
Published
2001-02-15
Pages
777-91
Language
English
Region
England
NLM ID
8208664
PMCID
PMC145434
Subset
IM
External Links
PubMed source DOI: 10.1093/emboj/20.4.777 PMC Full Text View journal details
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