Recombinant Human Semaphorin 6C Fc Chimera Protein, CF Summary
Optimal concentrations should be determined by each laboratory for each application.
|Human Semaphorin 6C|
(Ala25 - Val601)
Accession # NP_112175
(Pro100 - Lys330)
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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.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 500 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
Background: Semaphorin 6C
Semaphorin 6C (Sema6C; previously Sema Y) is a 120 kDa member of the Semaphorin family of axon guidance molecules (1 ‑ 3). The four known Class 6 semaphorins are type I transmembrane glycoproteins that are most like Class 1 invertebrate semaphorins in structure, and exhibit neuropilin-independent binding to specific plexin A receptors (1 ‑ 3). Amino acid (aa) identity of Class 6 semaphorins is around 40% overall, but 53 - 64% within the Sema domain. Sema6C is expressed developmentally in subregions of the central and peripheral nervous systems, heart, and kidney, and primarily in skeletal muscle in adults (3, 4). Human Sema6C cDNA encodes 930 aa, including a 24 aa signal sequence, a 579 aa extracellular domain (ECD) including the Sema domain, a 21 aa transmembrane sequence and a 306 aa cytoplasmic portion. Alternate exon splicing creates a 922 aa short form (Sema6C.3) that is lacking aa 184 - 223 within the Sema domain, but contains 32 unique aa inserted after aa 586; postnatally, this form predominates in muscle (2, 3). A 962 aa form contains only the insert. The 930 aa “long form” predominates in brain, especially in areas of increased plasticity (4). Human Sema6C ECD shares 92%, 93%, 94%, 94%, 95% and 87% aa identity with corresponding mouse, rat, porcine, bovine, equine and canine sequences, respectively. Sema6C, along with Sema6D, is co-expressed with and binds to Plexin A1 (5). This interaction is thought to guide proprioceptive peripheral neurons by repulsion, excluding them from the superficial dorsal horn of the spinal cord (5). Sema6C is down‑regulated and redistributed following denervation or axotomy, potentially promoting regrowth (4, 6). In muscle, Sema6C is concentrated at neuromuscular junctions (6).
- Zhou, Y. et al. (2008) Trends Biol. Sci. 33:161.
- Qu, X. et al. (2002) J. Biol. Chem. 277:35574.
- Kikuchi, K. et al. (1999) Mol. Cell. Neurosci. 13:9.
- Burgaya, F. et al. (2006) Mol. Cell. Neurosci. 33:321.
- Yoshida, Y. et al. (2006) Neuron 52:775.
- Svensson, A. et al. (2008) J. Mol. Hist. 39:5.
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