Recombinant Mouse Semaphorin 7A Fc Chimera Protein, CF

• Reactivity: Mu
• Applications: Bioactivity
• Format: Carrier-Free

Recombinant Mouse Semaphorin 7A Fc Chimera Protein, CF Summary

• Details of Functionality: Measured by the ability of the immobilized protein to support the adhesion of THP‑1 human acute monocytic leukemia cells. Suzuki, K. et al. (2007) Nature 446:680. The ED₅₀ for this effect is 0.1-0.5 μg/mL.
• Source: Mouse myeloma cell line, NS0-derived mouse Semaphorin 7A protein
  

  Mouse Semaphorin 7A (Gln45-Ala646) Accession # Q9QUR8	IEGRMDP	Mouse IgG2A (Glu98-Lys330)
  N-terminus		C-terminus

• Accession #: Q9QUR8
• N-terminal Sequence: No results obtained: Gln45 predicted
• Structure / Form: Disulfide-linked homodimer
• Protein/Peptide Type: Recombinant Proteins
• Gene: Sema7a
• Purity: >85%, by SDS-PAGE under reducing conditions and visualized by silver stain
• Endotoxin Note: <0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

• Dilutions:
  • Bioactivity
• Theoretical MW: 95.5 kDa (monomer).
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
• SDS-PAGE: 100-110 kDa, reducing conditions

Packaging, Storage & Formulations

• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS.
• Purity: >85%, by SDS-PAGE under reducing conditions and visualized by silver stain
• Reconstitution Instructions: Reconstitute at 500 μg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Mouse Semaphorin 7A Fc Chimera Protein, CF

• CD108 antigen
• CD108
• CD108MGC126696
• CDw108
• H-SEMA-K1
• H-Sema-L
• JMH blood group antigen
• JMH
• John-Milton-Hargen human blood group Ag
• MGC126692
• sema domain, immunoglobulin domain (Ig), and GPI membrane anchor, (semaphorin)7A (JMH blood group)
• sema domain, immunoglobulin domain (Ig), and GPI membrane anchor, (semaphorin)7A
• sema domain, immunoglobulin domain (Ig), and GPI membrane anchor, 7A
• Sema K1
• Sema L
• Sema7A
• SEMAK1
• SEMAL
• SEMALJohn Milton Hagen blood group H-Sema K1
• Semaphorin 7A
• semaphorin 7A, GPI membrane anchor (John Milton Hagen blood group)
• semaphorin K1
• semaphorin L
• semaphorin-7A
• semaphorin-K1
• semaphorin-L

Background

Semaphorin 7A (Sema7A, designated CD108, previously Sema K1 or Sema L), is an ~80 kDa membrane-anchored glycoprotein that is a member of the Semaphorin family of axon guidance molecules (1-4). On human erythrocytes, it is the John Milton Hagen (JMH) blood group antigen (4). Sema7A is the only known Class 7 or glycophosphatidylinositol (GPI)-linked semaphorin; its expression is concentrated in the brain, spleen and thymus (1-5). Mouse Sema7A cDNA encodes a 44 amino acid (aa) signal sequence, a 602 aa extracellular domain (ECD) including Sema and C2-type Ig-like domains, and an 18 aa propeptide/GPI membrane anchor signal sequence. Mature mouse Sema7A shares 89%, 98%, 85%, 86% and 89% aa identity with corresponding human, rat, bovine, canine and equine Sema7A, respectively. The Sema7A sema domain contains an RGD integrin interaction motif (4). Although it binds plexin-C1 in vitro and may be co‑expressed with it, many of its activities depend on interaction with beta 1 integrins such as alpha 1 beta 1 (6-10). Sema7A signaling through the two receptors may cause opposing effects (8). Sema7A is an immune semaphorin, with expression and activity on CD4⁺CD8⁺ thymocytes, activated T cells, macrophages and microglia (2, 9-12). T cell Sema7A interacts with monocytic cells, stimulating their chemotaxis, production of pro‑inflammatory cytokines, and dendritic differentiation (5, 6). However, on the T cells themselves, Sema7A down‑regulates TCR signaling by promoting TCR internalization, modulating T cell responses (9). In lung macrophages, Sema7A is induced by TGF-beta and participates in TGF-beta -induced lung fibrosis (12). Sema7A is also expressed on pre-osteoblasts and osteoclasts, where it promotes migration and fusion, respectively; on keratinocytes, where it promotes melanocyte spreading and dendricity; and on some neurons, for example, promoting axon outgrowth in the developing olfactory tract (8, 10, 13).

1. Yazdani, U. and J.R. Terman (2006) Genome Biol. 7:211.
2. Kikutani, H. et al. (2007) Adv. Immunol. 93:121.
3. Sato, Y. and (1998) Biochim. Biophys. Acta 1443:419.
4. Yamada, A. et al. (1999) J. Immunol. 162:4094.
5. Holmes, S. et al. (2002) Scand. J. Immunol. 56:270.
6. Suzuki, K. et al. (2007) Nature 446:680.
7. Pasterkamp, R.J. et al. (2007) BMC Dev. Biol. 7:98.
8. Scott, G.A. et al. (2007) J. Invest. Dermatol. 128:151.
9. Czopik, A.K. et al. (2006) Immunity 24:591.
10. Pasterkamp, R.J. et al. (2003) Nature 424:398.
11. Mine, T. et al. (2000) Tissue Antigens 55:429.
12. Kang, H.-R. et al. (2007) J. Exp. Med. 204:1083.
13. Delorme, G. et al. (2005) Biol. Cell 97:589.

Publications for Semaphorin 7A (1835-S3)(3)

Publications using 1835-S3

• N Vilallongu, J Schaeffer, AM Hesse, C Delpech, B Blot, A Paccard, E Plissonnie, B Excoffier, Y Couté, S Belin, H Nawabi Guidance landscapes unveiled by quantitative proteomics to control reinnervation in adult visual system Nature Communications, 2022-10-13;13(1):6040. 2022-10-13 [PMID: 36229455] (Bioassay, Mouse)
• D Köhler, T Granja, J Volz, M Koeppen, HF Langer, G Hansmann, E Legchenko, T Geisler, T Bakchoul, C Eggstein, HA Häberle, B Nieswandt, P Rosenberge Red blood cell-derived semaphorin 7A promotes thrombo-inflammation in myocardial ischemia-reperfusion injury through platelet GPIb Nat Commun, 2020-03-11;11(1):1315. 2020-03-11 [PMID: 32161256] (In Vivo, Mouse)
• Parkash J, Messina A, Langlet F, Cimino I, Loyens A, Mazur D, Gallet S, Balland E, Malone S, Pralong F, Cagnoni G, Schellino R, De Marchis S, Mazzone M, Pasterkamp R, Tamagnone L, Prevot V, Giacobini P Semaphorin7A regulates neuroglial plasticity in the adult hypothalamic median eminence. Nat Commun, 2015-02-27;6(0):6385. 2015-02-27 [PMID: 25721933] (Bioassay, In Vivo, Mouse, Rat)

Bioinformatics

• Gene Symbol: Sema7a
• Uniprot:
  • Q9QUR8()