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- Title
Role of Hec1 in spindle checkpoint signaling and kinetochore recruitment of Mad1/Mad2.
- Authors
Martin-Lluesma, Silvia; Stucke, Volker M; Nigg, Erich A
- Abstract
The spindle checkpoint delays sister chromatid separation until all chromosomes have undergone bipolar spindle attachment. Checkpoint failure may result in chromosome mis-segregation and may contribute to tumorigenesis. We showed that the human protein Hec1 was required for the recruitment of Mps1 kinase and Mad1/Mad2 complexes to kinetochores. Depletion of Hec1 impaired chromosome congression and caused persistent activation of the spindle checkpoint, indicating that high steady-state levels of Mad1/Mad2 complexes at kinetochores were not essential for checkpoint signaling. Simultaneous depletion of Hec1 and Mad2 caused catastrophic mitotic exit, making Hec1 an attractive target for the selective elimination of spindle checkpoint-deficient cells.
- Publication
Science (New York, N.Y.), 2002, Vol 297, Issue 5590, p2267
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1075596