ACIN1 Antibody – Mouse Monoclonal

Apoptosis is defined by several morphologic nuclear changes, including chromatin condensation and nuclear fragmentation. This gene encodes a nuclear protein that induces apoptotic chromatin condensation after activation by caspase-3, without inducing DNA fragmentation. This protein has also been shown to be a component of a splicing-dependent multiprotein exon junction complex (EJC) that is deposited at splice junctions on mRNAs, as a consequence of pre-mRNA splicing. It may thus be involved in mRNA metabolism associated with splicing. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Oct 2011]

acinus: an ubiquitous RNA-binding protein. Component of a splicing-dependent multiprotein exon junction complex (EJC) deposited at splice junction on mRNAs. The EJC is a dynamic structure consisting of a few core proteins and several more peripheral nuclear and cytoplasmic associated factors that join the complex only transiently either during EJC assembly or during subsequent mRNA metabolism. The EJC is composed of ACIN1, CASC3, DDX48, MAGOH, PNN, RBM8A, RNPS1, SAP18 and THOC4. Forms heterodimers with RNPS1. Found in a heterotrimeric complex with ACIN1, RNPS1 and SAP18. Interacts with API5. Phosphorylation by SRPK2 redistributes it from the nuclear speckles to the nucleoplasm, and up-regulates its stimulatory effect on cyclin A1. Activated by proteolytic cleavage. Induces apoptotic chromatin condensation after activation by CASP3. Regulates cyclin A1, but not cyclin A2, expression in leukemia cells. Four alternatively spliced human isoforms have been described.

Protein type: RNA-binding; Apoptosis; Spliceosome; RNA splicing

Chromosomal Location of Human Ortholog: 14q11.2

Cellular Component: cytoplasm; cytosol; nuclear speck; nucleolus; nucleoplasm; nucleus; plasma membrane

Molecular Function: ATPase activity; enzyme binding; nucleic acid binding; nucleotide binding; protein binding

Biological Process: apoptosis; apoptotic chromosome condensation; cell structure disassembly during apoptosis; erythrocyte differentiation; mRNA processing; negative regulation of nuclear mRNA splicing, via spliceosome; positive regulation of apoptosis; positive regulation of defense response to virus by host; positive regulation of monocyte differentiation; programmed cell death; RNA splicing