Bub1 kinase (Bub1) encodes a spindle checkpoint protein regulating chromosome congression. It also contributes to clathrin-dependent endocytosis of pathogens.
PHENOTYPE: Mutants show immune system abnormalities including decreased inflammatory response in one line, and uncontrolled splenocyte proliferation and susceptibility to intracellular pathogens in another. [provided by MGI curators]