Summary

Name BUB1B
Full Name Mitotic checkpoint serine/threonine-protein kinase BUB1 beta
Synonyms MAD3/BUB1-related protein kinase, hBUBR1, Mitotic checkpoint kinase MAD3L, Protein SSK1 | BUBR1, MAD3L, SSK1
Primary ID O60566
Links - -
Type protein
Relations 11
Function Essential component of the mitotic checkpoint. Required for normal mitosis progression. The mitotic checkpoint delays anaphase until all chromosomes are properly attached to the mitotic spindle. One of its checkpoint functions is to inhibit the activity of the anaphase-promoting complex/cyclosome (APC/C) by blocking the binding of CDC20 to APC/C, independently of its kinase activity. The other is to monitor kinetochore activities that depend on the kinetochore motor CENPE. Required for kinetochore localization of CENPE. Negatively regulates PLK1 activity in interphase cells and suppresses centrosome amplification. Also implicated in triggering apoptosis in polyploid cells that exit aberrantly from mitotic arrest. May play a role for tumor suppression.

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Modifications Tables

Relations

Regulator Mechanism target score
+ up-regulates img/direct-activation.png phosphorylation BUB1B 0.835
Publications: 4 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png phosphorylation BUB1B 0.769
Publications: 1 Organism: Homo Sapiens
+ form complex img/form-complex.png binding MCC 0.978
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/direct-activation.png binding BUB1B 0.2
Publications: 1 Organism: Homo Sapiens
+ up-regulates activity img/direct-activation.png binding BUB1B 0.84
Publications: 2 Organism: In Vitro, Mus Musculus
+ up-regulates quantity by expression img/direct-activation.png transcriptional regulation BUB1B 0.276
Publications: 1 Organism: Homo Sapiens
+ up-regulates img/indirect-activation.png Mitotic_checkpoint 0.7
Publications: 1 Organism: Homo Sapiens