Aliases for BUB1B Gene
External Ids for BUB1B Gene
Previous GeneCards Identifiers for BUB1B Gene
This gene encodes a kinase involved in spindle checkpoint function. The protein has been localized to the kinetochore and plays a role in the inhibition of the anaphase-promoting complex/cyclosome (APC/C), delaying the onset of anaphase and ensuring proper chromosome segregation. Impaired spindle checkpoint function has been found in many forms of cancer. [provided by RefSeq, Jul 2008]
GeneCards Summary for BUB1B Gene
BUB1B (BUB1 Mitotic Checkpoint Serine/Threonine Kinase B) is a Protein Coding gene. Diseases associated with BUB1B include Mosaic Variegated Aneuploidy Syndrome 1 and Premature Chromatid Separation Trait. Among its related pathways are Cell Cycle, Mitotic and CDK-mediated phosphorylation and removal of Cdc6. Gene Ontology (GO) annotations related to this gene include transferase activity, transferring phosphorus-containing groups and protein serine/threonine kinase activity. An important paralog of this gene is BUB1.
UniProtKB/Swiss-Prot Summary for BUB1B Gene
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.