2i3s
Bub3 complex with Bub1 GLEBS motifBub3 complex with Bub1 GLEBS motif
FunctionFunction
[BUB3_YEAST] Required for cell cycle arrest in response to loss of microtubule function. Component of the spindle assembly checkpoint which is a feedback control that prevents cells with incompletely assembled spindles from leaving mitosis. Component of the mitotic checkpoint complex (MCC) which inhibits the ubiquitin ligase activity of the anaphase promoting complex/cyclosome (APC/C) by preventing its activation by CDC20. The formation of a MAD1-BUB1-BUB3 complex seems to be required for the spindle checkpoint mechanism.[1] [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.[2]
About this StructureAbout this Structure
2i3s is a 6 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA.
ReferenceReference
- ↑ Poddar A, Stukenberg PT, Burke DJ. Two complexes of spindle checkpoint proteins containing Cdc20 and Mad2 assemble during mitosis independently of the kinetochore in Saccharomyces cerevisiae. Eukaryot Cell. 2005 May;4(5):867-78. PMID:15879521 doi:10.1128/EC.4.5.867-878.2005
- ↑ 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