Anti-PEF1 Antibody Picoband® Fluoro647 Conjugated

Peflin is a protein that in humans is encoded by the PEF1 gene. This gene encodes a calcium-binding protein belonging to the penta-EF-hand protein family. The encoded protein has been shown to form a heterodimer with the programmed cell death 6 gene product and may modulate its function in Ca (2+) signaling. Alternative splicing results in multiple transcript variants and a pseudogene has been identified on chromosome 1.

Calcium-binding protein that acts as an adapter that bridges unrelated proteins or stabilizes weak protein-protein complexes in response to calcium. Together with PDCD6, acts as calcium-dependent adapter for the BCR (KLHL12) complex, a complex involved in endoplasmic reticulum (ER) -Golgi transport by regulating the size of COPII coats. In response to cytosolic calcium increase, the heterodimer formed with PDCD6 interacts with, and bridges together the BCR (KLHL12) complex and SEC31 (SEC31A or SEC31B), promoting monoubiquitination of SEC31 and subsequent collagen export, which is required for neural crest specification. Its role in the heterodimer formed with PDCD6 is however unclear: some evidences show that PEF1 and PDCD6 work together and promote association between PDCD6 and SEC31 in presence of calcium. Other reports show that PEF1 dissociates from PDCD6 in presence of calcium, and may act as a negative regulator of PDCD6. Also acts as a negative regulator of ER-Golgi transport; possibly by inhibiting interaction between PDCD6 and SEC31.

1. Kitaura Y, Watanabe M, Satoh H, Kawai T, Hitomi K, Maki M (Oct 1999) . Peflin, a novel member of the five-EF-hand-protein family, is similar to the apoptosis-linked gene 2 (ALG-2) protein but possesses nonapeptide repeats in the N-terminal hydrophobic region. Biochem Biophys Res Commun. 263 (1) : 68–75. 2. Kitaura Y, Satoh H, Takahashi H, Shibata H, Maki M (Mar 2002) . Both ALG-2 and peflin, penta-EF-hand (PEF) proteins, are stabilized by dimerization through their fifth EF-hand regions. Arch Biochem Biophys.399 (1) : 12–8.