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  BubR1 promotes Bub3-dependent APC/C inhibition during Spindle Assembly Checkpoint signaling.

Overlack, K., Bange, T., Weissmann, F., Faesen, A. C., Maffini, S., Primorac, I., et al. (2017). BubR1 promotes Bub3-dependent APC/C inhibition during Spindle Assembly Checkpoint signaling. Current Biology, 27(19), 2915-2927. doi:10.1016/j.cub.2017.08.033.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1E6B-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1E6E-D
Genre: Journal Article

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 Creators:
Overlack, K., Author
Bange, T., Author
Weissmann, F., Author
Faesen, A. C.1, Author              
Maffini, S,, Author
Primorac, I., Author
Müller, F., Author
Peters, J. M., Author
Musaccio, A., Author
Affiliations:
1Research Group Biochemistry of Signal Dynamics, MPI for Biophysical Chemistry, Max Planck Society, ou_2466695              

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Free keywords: APC/C; Bub1; Bub3; BubR1; Knl1; MCC; gene duplication; kinetochore; spindle assembly checkpoint; sub-functionalization
 Abstract: The spindle assembly checkpoint (SAC) prevents premature sister chromatid separation during mitosis. Phosphorylation of unattached kinetochores by the Mps1 kinase promotes recruitment of SAC machinery that catalyzes assembly of the SAC effector mitotic checkpoint complex (MCC). The SAC protein Bub3 is a phospho-amino acid adaptor that forms structurally related stable complexes with functionally distinct paralogs named Bub1 and BubR1. A short motif ("loop") of Bub1, but not the equivalent loop of BubR1, enhances binding of Bub3 to kinetochore phospho-targets. Here, we asked whether the BubR1 loop directs Bub3 to different phospho-targets. The BubR1 loop is essential for SAC function and cannot be removed or replaced with the Bub1 loop. BubR1 loop mutants bind Bub3 and are normally incorporated in MCC in vitro but have reduced ability to inhibit the MCC target anaphase-promoting complex (APC/C), suggesting that BubR1:Bub3 recognition and inhibition of APC/C requires phosphorylation. Thus, small sequence differences in Bub1 and BubR1 direct Bub3 to different phosphorylated targets in the SAC signaling cascade.

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Language(s): eng - English
 Dates: 2017-09-212017-10-09
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.cub.2017.08.033
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Title: Current Biology
Source Genre: Journal
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Pages: - Volume / Issue: 27 (19) Sequence Number: - Start / End Page: 2915 - 2927 Identifier: -