Recombinant Mouse SorCS1 Protein, CF

Recombinant Mouse SorCS1 Protein, CF Summary

Product Specifications

Product Datasheets

Carrier Free

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Background: SorCS1

SorCS1 is a type I transmembrane protein that belongs to the mammalian Vps10p (vacuolar protein-sorting 10 protein) family of receptors (1, 2). This family includes sortilin, SorLA, and three SorCS proteins. Three isoforms (SorCS1a, b and c) are known that differ only in their cytoplasmic domains (3). All three are predominantly expressed in the central nervous system, but SorCS1 can also be identified in heart, kidney and pancreatic islets (2 - 5). Although SorCS1a mediates endocytosis, only 10% of it is expressed on the cell surface. SorCS1b shows higher surface expression (45%) and is much less involved in endocytosis. SorCS1c is intermediate in expression. Mouse SorCS1a is synthesized as an 1167 amino acid (aa) preproform with a 33 aa signal sequence and a 78 aa propeptide. After proteolytic processing at a furin-type consensus sequence, the mature SorCS1a is a 1057 aa, 130 kDa protein with a 988 aa extracellular/lumenal domain (ECD). Within the ECD, mouse SorCS1 shares 93%, 98%, 91% and 98% aa identity with human, rat, bovine and canine SorCS1, respectively. It also shares 70% and 46% aa identity with the ECD of human SorCS3 and SorCS2, respectively. The ECD contains an imperfect leucine-rich repeat (LRR) plus a Vps10p domain, and binds the growth factor PDGF-BB (1, 2, 6). Expression in the hippocampus indicates that SorCS1 may modulate PDGF-BB activity in this location (6). SorCS1 has also been identified as a susceptibility gene for type 2 diabetes in overweight female mice or humans (4). Consequently, it has been proposed to affect insulin secretion by modifying PDGF-mediated growth of the islet vasculature (7). The 80 kDa ECD may be constitutively or inducibly shed, mainly via the metalloproteinase TACE/ADAM17 (6). The shed soluble form also binds PDGF. The cellular portion appears to undergo regulated intramembrane proteolysis (8).

Related Research Areas

• APP Processing and Amyloid Plaque Formation
• Diabetes
• Neurotrophic Factors and Receptors
• VEGF Family
• VPS10P-domain Family