Structural highlights
Function
[BUB1_YEAST] Involved in cell cycle checkpoint enforcement. The formation of a MAD1-BUB1-BUB3 complex seems to be required for the spindle checkpoint mechanism. Catalyzes the phosphorylation of BUB3 and its autophosphorylation. Associates with centromere (CEN) DNA via interaction with SKP1. The association with SKP1 is required for the mitotic delay induced by kinetochore tension defects, but not for the arrest induced by spindle depolymerization or kinetochore assembly defects.[1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The interaction of the central mitotic checkpoint component BUB1 with the mitotic kinetochore protein Blinkin is required for the kinetochore localization and function of BUB1 in the mitotic spindle assembly checkpoint, the regulatory mechanism of the cell cycle that ensures the even distribution of chromosomes during the transition from metaphase to anaphase. Here, we report the 1.74 angstroms resolution crystal structure of the N-terminal region of BUB1. The structure is organized as a tandem arrangement of three divergent units of the tetratricopeptide motif. Functional assays in vivo of native and site-specific mutants identify the residues of human BUB1 important for the interaction with Blinkin and define one region of potential therapeutic interest. The structure provides insight into the molecular basis of Blinkin-specific recognition by BUB1 and, on a broader perspective, of the mechanism that mediates kinetochore localization of BUB1 in checkpoint-activated cells.
The crystal structure of the N-terminal region of BUB1 provides insight into the mechanism of BUB1 recruitment to kinetochores.,Bolanos-Garcia VM, Kiyomitsu T, D'Arcy S, Chirgadze DY, Grossmann JG, Matak-Vinkovic D, Venkitaraman AR, Yanagida M, Robinson CV, Blundell TL Structure. 2009 Jan 14;17(1):105-16. PMID:19141287[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kitagawa K, Abdulle R, Bansal PK, Cagney G, Fields S, Hieter P. Requirement of Skp1-Bub1 interaction for kinetochore-mediated activation of the spindle checkpoint. Mol Cell. 2003 May;11(5):1201-13. PMID:12769845
- ↑ Bolanos-Garcia VM, Kiyomitsu T, D'Arcy S, Chirgadze DY, Grossmann JG, Matak-Vinkovic D, Venkitaraman AR, Yanagida M, Robinson CV, Blundell TL. The crystal structure of the N-terminal region of BUB1 provides insight into the mechanism of BUB1 recruitment to kinetochores. Structure. 2009 Jan 14;17(1):105-16. PMID:19141287 doi:10.1016/j.str.2008.10.015
