The function of ENSG00000196388 (INCA1, inhibitor of CDK, cyclin A1 interacting protein 1) is as follows. Binds to CDK2-bound cyclins and inhibits the kinase activity of CDK2; binding to cyclins is critical for its function as CDK inhibitor (PubMed:21540187). Inhibits cell growth and cell proliferation and may play a role in cell cycle control (By similarity). Required for ING5-mediated regulation of S-phase progression, enhancement of Fas-induced apoptosis and inhibition of cell growth (By similarity). {ECO:0000250|UniProtKB:Q6PKN7, ECO:0000269|PubMed:21540187}.