May be required for replication-independent chromatin assembly. May serve as a negative regulator of T-cell receptor (TCR) signaling via inhibition of calcineurin. Inhibition of activated calcineurin is dependent on both PKC and calcium signals. Acts as a negative regulator of p53/TP53 by keeping p53 in an inactive state on chromatin at promoters of a subset of it's target genes. Component of a complex that includes at least ASF1A, CABIN1, HIRA, histone H3.3 and UBN1. Interacts with calcineurin. Interacts with MEF2B. Widely expressed in different tissues. Activated through PKC-mediated hyperphosphorylation. Phosphorylation by the DNA damage kinases ATM and CHK2 enhances ubiquitination. Upon genotoxic stress, ubiquitination by the DCX(DDB2) E3 ubiquitin-protein ligase complex targets CABIN1 for proteasomal degradation, leading to the release of p53/TP53.