Anti-NXPH3 Antibody Picoband®

Neurexophilin-3 is a protein that in humans is encoded by the NXPH3 gene. Neurexophilin-3 (NXPH-3) is a neuropeptide-like secreted glycoprotein in the neurexophilin family. The 252 amino acid (aa) NXPH-3 precursor contains a 22 aa signal peptide, plus a 230 aa proprecursor that is likely cleaved at a basic motif, producing a 76 aa propeptide and a 154 aa mature protein. Mature rat NXPH-3 shares 99%, 95% and 92% aa identity with mouse, human and bovine NXPH-3, respectively. It contains motifs that are conserved among all neurexophilins, including three potential N-glycosylation sites in the N-terminal portion and six cysteines in the C-terminal portion. NXPH-3 is expressed selectively in subplate-derived neurons in the cortex, granule cells in the vestibulocerebellum, and Cajal-Retzius cells during development. NXPH-1 is the neurexophilin most similar to NXPH-3, sharing 69% aa identity within the mature region. Expression of NXPH-1 and NXPH-3 does not appear to overlap, with NXPH-1 expression occurring mainly by cells that resemble inhibitory interneurons. Both are tightly bound extracellular ligands of alpha -neurexins, synaptic transmembrane molecules that are essential for calcium-triggered neurotransmitter release. Genetic deletion of NXPH-1 and/or NXPH-3 produces no anatomical effect, although mice lacking NXPH-3 show specific defects in motor coordination. Of the other known neurexophilins, NXPH-2 is not expressed in rodents, and NXPH-4 does not bind alpha -neurexins.

E.coli-derived human NXPH3 recombinant protein (Position: R5-K217) . Human NXPH3 shares 95.8% amino acid (aa) sequence identity with mouse and rat NXPH3, respectively.

1. Gross, M. B. Personal Communication. Baltimore, Md. 10/24/2014. 2. Missler, M., Sudhof, T. C. Neurexophilins form a conserved family of neuropeptide-like glycoproteins. J. Neurosci. 18: 3630-3638, 1998. 3. Petrenko, A. G., Ullrich, B., Missler, M., Krasnoperov, V., Rosahl, T. W., Sudhof, T. C. Structure and evolution of neurexophilin. J. Neurosci. 16: 4360-4369, 1996.

At -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freezing and thawing.