Gene Symbol: bub3
Description: mitotic spindle checkpoint protein Bub3
Alias: mitotic spindle checkpoint protein Bub3
Species: fission yeast

Top Publications

  1. Millband D, Hardwick K. Fission yeast Mad3p is required for Mad2p to inhibit the anaphase-promoting complex and localizes to kinetochores in a Bub1p-, Bub3p-, and Mph1p-dependent manner. Mol Cell Biol. 2002;22:2728-42 pubmed
    ..We discuss the implications of these findings in the context of our current understanding of spindle checkpoint function. ..
  2. Vanoosthuyse V, Valsdottir R, Javerzat J, Hardwick K. Kinetochore targeting of fission yeast Mad and Bub proteins is essential for spindle checkpoint function but not for all chromosome segregation roles of Bub1p. Mol Cell Biol. 2004;24:9786-801 pubmed
    ..Surprisingly, neither this domain nor kinetochore localization is required for other functions of Bub1p in chromosome segregation. ..
  3. Kadura S, He X, Vanoosthuyse V, Hardwick K, Sazer S. The A78V mutation in the Mad3-like domain of Schizosaccharomyces pombe Bub1p perturbs nuclear accumulation and kinetochore targeting of Bub1p, Bub3p, and Mad3p and spindle assembly checkpoint function. Mol Biol Cell. 2005;16:385-95 pubmed
    ..screen to isolate SAC mutants in fission yeast yielded point mutations in three fission yeast SAC genes: mad1, bub3, and bub1...
  4. Windecker H, Langegger M, Heinrich S, Hauf S. Bub1 and Bub3 promote the conversion from monopolar to bipolar chromosome attachment independently of shugoshin. EMBO Rep. 2009;10:1022-8 pubmed publisher
    The eukaryotic spindle assembly checkpoint (SAC) delays anaphase in the presence of chromosome attachment errors. Bub3 has been reported to be required for SAC activity in all eukaryotes examined so far...
  5. Meadows J, Shepperd L, Vanoosthuyse V, Lancaster T, Sochaj A, Buttrick G, et al. Spindle checkpoint silencing requires association of PP1 to both Spc7 and kinesin-8 motors. Dev Cell. 2011;20:739-50 pubmed publisher
    ..These data demonstrate that at least two distinct pools of PP1, one kinetochore associated and the other motor associated, are needed to silence the spindle checkpoint. ..
  6. Tange Y, Niwa O. Schizosaccharomyces pombe Bub3 is dispensable for mitotic arrest following perturbed spindle formation. Genetics. 2008;179:785-92 pubmed publisher
    ..We found that fission yeast Bub3 is dispensable for SAC, as bub3 null mutants blocked mitotic progression when spindle formation was disrupted...
  7. Shepperd L, Meadows J, Sochaj A, Lancaster T, Zou J, Buttrick G, et al. Phosphodependent recruitment of Bub1 and Bub3 to Spc7/KNL1 by Mph1 kinase maintains the spindle checkpoint. Curr Biol. 2012;22:891-9 pubmed publisher
    ..Components of the checkpoint include Mad1, Mad2, Mad3 (BubR1), Bub3, and the kinases Bub1, Mph1 (Mps1), and Aurora B...
  8. Heinrich S, Windecker H, Hustedt N, Hauf S. Mph1 kinetochore localization is crucial and upstream in the hierarchy of spindle assembly checkpoint protein recruitment to kinetochores. J Cell Sci. 2012;125:4720-7 pubmed publisher
    ..In bub3? cells, the SAC is functional when only Mph1 and the Aurora kinase Ark1, but no other SAC proteins, are enriched at ..
  9. Tang N, Toda T. Alp7/TACC recruits kinesin-8-PP1 to the Ndc80 kinetochore protein for timely mitotic progression and chromosome movement. J Cell Sci. 2015;128:354-63 pubmed publisher
    ..We propose that the recruitment of kinesin-8-PP1 to the kinetochore through Alp7/TACC interaction plays a crucial role in regulation of timely mitotic progression and chromosome movement during anaphase A. ..

More Information


  1. Mora Santos M, Hervás Aguilar A, Sewart K, Lancaster T, Meadows J, Millar J. Bub3-Bub1 Binding to Spc7/KNL1 Toggles the Spindle Checkpoint Switch by Licensing the Interaction of Bub1 with Mad1-Mad2. Curr Biol. 2016;26:2642-2650 pubmed publisher
    ..Spindle checkpoint proteins, including Mad1, Mad2, Mad3 (BubR1), Bub1, Bub3, and Mph1 (Mps1), are recruited to unattached and/or tensionless kinetochores...
  2. Sewart K, Hauf S. Different Functionality of Cdc20 Binding Sites within the Mitotic Checkpoint Complex. Curr Biol. 2017;27:1213-1220 pubmed publisher
  3. Pidoux A, Richardson W, Allshire R. Sim4: a novel fission yeast kinetochore protein required for centromeric silencing and chromosome segregation. J Cell Biol. 2003;161:295-307 pubmed
    ..Our analyses illustrate the fundamental link between silencing, chromatin structure, and kinetochore function, and establish defective silencing as a powerful approach for identifying proteins required to build a functional kinetochore. ..
  4. Asakawa K, Toya M, Sato M, Kanai M, Kume K, Goshima T, et al. Mal3, the fission yeast EB1 homologue, cooperates with Bub1 spindle checkpoint to prevent monopolar attachment. EMBO Rep. 2005;6:1194-200 pubmed
    ..Double mutants between mal3 and a subset of checkpoint mutants, including bub1, bub3, mad3 and mph1, but not mad1 or mad2, show massive chromosome mis-segregation defects...
  5. Asakawa K, Kume K, Kanai M, Goshima T, Miyahara K, Dhut S, et al. The V260I mutation in fission yeast alpha-tubulin Atb2 affects microtubule dynamics and EB1-Mal3 localization and activates the Bub1 branch of the spindle checkpoint. Mol Biol Cell. 2006;17:1421-35 pubmed
    ..missegregation and is synthetically lethal with deletions in a subset of spindle checkpoint genes including bub1, bub3, and mph1, but not with mad1, mad2, and mad3...
  6. Vanoosthuyse V, Meadows J, van der Sar S, Millar J, Hardwick K. Bub3p facilitates spindle checkpoint silencing in fission yeast. Mol Biol Cell. 2009;20:5096-105 pubmed publisher
    ..Surprisingly, a robust mitotic arrest is maintained in the majority of bub3 Delta cells, yet they die, suggesting that Bub3p is essential for successful checkpoint recovery...
  7. Yamagishi Y, Yang C, Tanno Y, Watanabe Y. MPS1/Mph1 phosphorylates the kinetochore protein KNL1/Spc7 to recruit SAC components. Nat Cell Biol. 2012;14:746-52 pubmed publisher
    ..This phosphorylation promotes the in vitro binding to the Bub1-Bub3 complex, which is required for kinetochore-based SAC activation (Mad1-Mad2-Mad3 localization) and chromosome ..