FIBP Antibody – Rabbit Polyclonal

The protein encoded by this gene is a calcyclin binding protein. It may be involved in calcium-dependent ubiquitination and subsequent proteosomal degradation of target proteins. It probably serves as a molecular bridge in ubiquitin E3 complexes and participates in the ubiquitin-mediated degradation of beta-catenin. Two alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CACYBP: a nuclear/cytoplasmic protein involved in calcium-dependent ubiquitination and proteosomal degradation of target proteins. A possible molecular bridge in ubiquitin E3 complexes. Participates in the ubiquitin-mediated degradation of beta-catenin (CTNNB1). Interacts with proteins of the S100 family at physiological calcium concentrations. Component of some large E3 complexes and interacts directly with SIAH1, SIAH2 and SKP1A. Cytoplasmic at low calcium concentrations. In neuroblastoma cells, after a retinoic acid (RA) induction and calcium increase, it localizes in both the nucleus and cytoplasm. The nuclear fraction may be phosphorylated. Two alternatively spliced isoforms have been described.

Protein type: Ubiquitin conjugating system; Adaptor/scaffold

Chromosomal Location of Human Ortholog: 1q24-q25

Cellular Component: nucleoplasm; neuron projection; nuclear envelope lumen; cytoplasm; beta-catenin destruction complex

Molecular Function: protein binding; protein homodimerization activity

Biological Process: positive regulation of DNA replication; cardiac muscle cell differentiation; aging