May promote cell cycle arrest by enhancing the inhibition of CDK2 activity by CDKN1A. May be required for repair of DNA damage by homologous recombination in conjunction with BRCA2. May not be involved in non-homologous end joining (NHEJ).
Expressed at high levels in testis and skeletal muscle and at lower levels in brain, heart, kidney, liver, lung, ovary, pancreas, placenta, and spleen.
Belongs to the BCP1 family.
Isoform 1 is expressed throughout the cell cycle. Isoform 2 is expressed following mitosis and peaks in the G1/S phase of the cell cycle.
Nucleus. Colocalizes with BRCA2 in discrete nuclear foci.