OAZ1 Antibody – Rabbit Polyclonal

The protein encoded by this gene belongs to the ornithine decarboxylase antizyme family, which plays a role in cell growth and proliferation by regulating intracellular polyamine levels. Expression of antizymes requires +1 ribosomal frameshifting, which is enhanced by high levels of polyamines. Antizymes in turn bind to and inhibit ornithine decarboxylase (ODC), the key enzyme in polyamine biosynthesis; thus, completing the auto-regulatory circuit. This gene encodes antizyme 1, the first member of the antizyme family, that has broad tissue distribution, and negatively regulates intracellular polyamine levels by binding to and targeting ODC for degradation, as well as inhibiting polyamine uptake. Antizyme 1 mRNA contains two potential in-frame AUGs; and studies in rat suggest that alternative use of the two translation initiation sites results in N-terminally distinct protein isoforms with different subcellular localization. Alternatively spliced transcript variants have also been noted for this gene. [provided by RefSeq, Dec 2014]

OAZ1: Binds to, and destabilizes, ornithine decarboxylase which is then degraded. Also inhibits cellular uptake of polyamines by inactivating the polyamine uptake transporter. SMAD1/OAZ1/PSMB4 complex mediates the degradation of the CREBBP/EP300 repressor SNIP1. Belongs to the ODC antizyme family. 1 isoforms of the human protein are produced by ribosomal frameshifting.

Protein type: Inhibitor

Chromosomal Location of Human Ortholog: 19p13.3

Cellular Component: cytosol

Molecular Function: protein binding; ornithine decarboxylase inhibitor activity

Biological Process: transport; polyamine biosynthetic process; negative regulation of catalytic activity; positive regulation of protein catabolic process; regulation of amino acid metabolic process