TOK-1 rabbit pAb

This gene product was isolated on the basis of its interaction with BRCA2 and p21 proteins. It is an evolutionarily conserved nuclear protein with multiple interacting domains. The N-terminal half shares moderate homology with regions of calmodulin and M-calpain, suggesting that it may also bind calcium. Functional studies indicate that this protein may be an important cofactor for BRCA2 in tumor suppression, and a modulator of CDK2 kinase activity via p21. This protein has also been implicated in the regulation of BRCA2 and RAD51 nuclear focus formation, double-strand break-induced homologous recombination, and cell cycle progression. Multiple transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

Nucleus . Cytoplasm, cytoskeleton, microtubule organizing center, centrosome, centriole . Cytoplasm, cytoskeleton, spindle pole . Colocalizes with BRCA2 in discrete nuclear foci (PubMed:15713648) . In interphase, preferential localizes to the mother centriole (PubMed:28394342) . Recruited to the spindle pole matrix and centrosome by microtubules and dynein/dynactin activity (PubMed:28394342) . .; [Isoform 1]: Cytoplasm, cytoskeleton, microtubule organizing center, centrosome . Cytoplasm, cytoskeleton, spindle pole . Isoform 1/beta tends to be less abundant at, and less strongly associated with, centrosomes than isoform 2/alpha. .; [Isoform 2]: Cytoplasm, cytoskeleton, microtubule organizing center, centrosome . Cytoplasm, cytoskeleton, spindle pole . Isoform 2/alpha tends to be more abundant