Recombinant Human Semaphorin 4D Fc Chimera Protein, CF

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

Recombinant Human Semaphorin 4D Fc Chimera Protein, CF Summary

• Details of Functionality: Measured by its ability to inhibit survival of SK‑OV‑3 human ovarian carcinoma cells. The ED₅₀ for this effect is typically 0.4-2 μg/mL. Measured by its binding ability in a functional ELISA. When Recombinant Human Plexin B2 (Catalog # 5329-PB) is coated at 5 μg/mL, Recombinant Human Semaphorin 4D/CD100 Fc Chimera binds with an apparent K_d <4 nM.
• Source: Chinese Hamster Ovary cell line, CHO-derived human Semaphorin 4D/CD100 protein
  

  Human Semaphorin 4D (Met22-Arg734) Accession # Q92854	IEGRMD	Human IgG1 (Pro100-Lys330)
  N-terminus		C-terminus

• Accession #: Q92854
• N-terminal Sequence: Met22 & Phe24
• Structure / Form: Disulfide-linked homodimer
• Protein/Peptide Type: Recombinant Proteins
• Gene: SEMA4D
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
• Endotoxin Note: <0.01 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

• Dilutions:
  • Bioactivity
  • Bioactivity2
• Theoretical MW: 105.8 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: 110-135 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 with Trehalose.
• Purity: >90%, by SDS-PAGE under reducing conditions and visualized by silver stain.
• Reconstitution Instructions: Reconstitute at 250 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 Human Semaphorin 4D Fc Chimera Protein, CF

• A8
• BB18
• CD100 antigen
• CD100
• CD100M-sema-G
• COLL-4
• FLJ33485
• FLJ34282
• FLJ39737
• FLJ46484
• immunoglobulin domain (Ig), transmembrane domain (TM) and shortcytoplasmic domain, 4D
• MGC169138
• MGC169141
• M-sema-G
• sema domain, immunoglobulin domain (Ig), transmembrane domain (TM) and shortcytoplasmic domain, (semaphorin) 4D
• SEMA4D
• SEMAJ
• Semaphorin 4D
• semaphorin-4D

Background

Semaphorin 4D (Sema4D/CD100, previously Sem J, G or C-like 2) is a 150 kDa type I transmembrane glycoprotein that belongs to the Class 4 family of transmembrane immune and nervous system semaphorins (1‑3). The human Sema4D cDNA encodes 862 amino acids (aa) that include a 21 aa signal sequence, a 713 aa extracellular domain (ECD), a 21 aa transmembrane segment and a 107 aa cytoplasmic tail. The Sema4D ECD contains one sema, PSI and immunoglobulin‑like domain, and over the full ECD (aa 22‑734), human Sema4D shares 85%, 85%, 86% and 80% aa sequence identity with mouse, rat, porcine and canine Sema4D ECDs, respectively. Sema4D is active as a homodimer that utilizes both a membrane‑proximal intermolecular disulfide bond and two hydrophobic interactions involving Phe244 and Phe246 (4, 5). Proteolysis by metalloproteinases such as TACE/ADAM17 and MMP-14 (MT1‑MMP) produce a soluble, active 120 kDa form that may also exist as a dimer (5‑7). Sema4D, produced by T cells, activated B cells and dendritic cells acts through a low affinity receptor termed CD72 in the immune system (1, 2). Unligated CD72 inhibits antigen presenting cells that express it, and this inhibition is relieved by Sema4D binding (8). Sema4D thus causes enhanced B cell survival, differentiation of macrophages and DC, and enhanced T cell antigen priming (2, 8, 9). In the CNS, Sema4D and a high affinity receptor Plexin B1 are expressed in complimentary patterns in several regions of the brain, and their interaction assists in the guidance of developing neurons (10). Intermediate affinity Sema4D:Plexin B2 binding also occurs during development, and enhances both radial and tangential neuronal migration (11). In cancer, Sema4D can also be produced by tumor‑associated macrophages, and bind to endothelial cell Plexin B1, thus promoting tumor angiogenesis (3, 6, 7, 12). While this suggests facilitation of the metastatic process, it is also recognized that semaphorins in general show both tumor promoter and suppressor functions (13, 14). For Sema4D, this is reflected in its ability to inhibit ovarian carcinoma cell survival. Finally, receptors that associate in cis with plexins, such as Met and ErbB2, are known to alter Sema4D‑mediated activities (3).

1. Furuyama, T. et al. (1996) J. Biol. Chem. 271:33376.
2. Kumanogoh, A. and H. Kikutani (2004) Cell. Mol. Life Sci. 61:292.
3. Ch’ng, E.S. and A. Kumanogoh (2010) Mol. Cancer 9:251.
4. Janssen, B.J.C. et al. (2010) Nature 467:1118.
5. Elhabazi, A. et al. (2001) J. Immunol. 166:4341.
6. Zhu, L. et al. (2007) Proc. Natl. Acad. Sci. USA 104:1621.
7. Basile, J.R. et al. (2007) J. Biol. Chem. 282:6899.
8. Kumanogoh, A. et al. (2005) Int. Immunol. 17:1277.
9. Ishida, I. et al. (2003) Int. Immunol. 15:1027.
10. Worzfield, T. et al. (2004) Eur. J. Neurosci. 19:2622.
11. Hirschberg, A. et al. (2010) Mol. Cell. Biol. 30:764.
12. Sierra, J.R. et al. (2008) J. Exp. Med. 205:1673.
13. Ye, S. et al. (2010) BMC Cancer 10:611.
14. Lu, T-P. et al. (2012) Transl. Cancer Res. 1:74.

Publications for Semaphorin 4D/CD100 (7470-S4)(4)

Publications using 7470-S4

• Adel, SS;Clarke, VRJ;Evans-Strong, A;Maguire, J;Paradis, S; Semaphorin 4D induced inhibitory synaptogenesis decreases epileptiform activity and alters progression to Status Epilepticus in mice Epilepsy research 2023-04-27 [PMID: 37163910] (Bioassay, Mouse)
• M Vogler, A Oleksy, S Schulze, M Fedorova, B Kojonazaro, S Nijjar, S Patel, S Jossi, K Sawmynaden, M Henry, R Brown, D Matthews, S Offermanns, T Worzfeld An antagonistic monoclonal anti-Plexin-B1 antibody exerts therapeutic effects in mouse models of postmenopausal osteoporosis and multiple sclerosis The Journal of Biological Chemistry, 2022-07-15;0(0):102265. 2022-07-15 [PMID: 35850304] (Bioassay, Human)
• J Huang, S Wu, S Cao, X Zhu, S Zhang Neutrophil-Derived Semaphorin 4D Induces Inflammatory Cytokine Production of Endothelial Cells via Different Plexin Receptors in Kawasaki Disease BioMed Research International, 2020-12-16;2020(0):6663291. 2020-12-16 [PMID: 33381571] (Bioassay, Human)
• M Stromecki, N Tatari, LC Morrison, R Kaur, J Zagozewski, G Palidwor, V Ramaswamy, P Skowron, M Wölfl, T Milde, MR Del Bigio, MD Taylor, TE Werbowetsk Characterization of a novel OTX2-driven stem cell program in Group 3 and Group 4 medulloblastoma Mol Oncol, 2018-03-01;12(4):495-513. 2018-03-01 [PMID: 29377567] (Bioassay, Human)

Bioinformatics

• Gene Symbol: SEMA4D
• Uniprot:
  • Q92854()