Anti-SEMA4A Antibody Picoband®

Semaphorin-4A is a protein that in humans is encoded by the SEMA4A gene. This gene encodes a member of the semaphorin family of soluble and transmembrane proteins. Semaphorins are involved in numerous functions, including axon guidance, morphogenesis, carcinogenesis, and immunomodulation. The encoded protein is a single-pass type I membrane protein containing an immunoglobulin-like C2-type domain, a PSI domain and a sema domain. It inhibits axonal extension by providing local signals to specify territories inaccessible for growing axons. It is an activator of T-cell-mediated immunity and suppresses vascular endothelial growth factor (VEGF) -mediated endothelial cell migration and proliferation in vitro and angiogenesis in vivo. Mutations in this gene are associated with retinal degenerative diseases including retinitis pigmentosa type 35 (RP35) and cone-rod dystrophy type 10 (CORD10) . Multiple alternatively spliced transcript variants encoding different isoforms have been identified.

Sequence-specific DNA-binding transcription factor. Represses transcription at least in part by recruitment of the histone methyltransferase EHMT2/G9A and histone deacetylases such as HDAC1. Regulates hematopoiesis-associated protein-coding and microRNA (miRNA) genes. May regulate the expression of proteins involved in extracellular matrix development and maintenance, including fibrillar collagens, such as COL4A1 and COL11A1, connective tissue components, such as HAPLN1, and molecules regulating cell migration and adhesion, including EDIL3 and TGFB2. May cause G2/M arrest and apoptosis in cancer cells.

1. Abid, A., Ismail, M., Mehdi, S. Q., Khaliq, S. Identification of novel mutations in the SEMA4A gene associated with retinal degenerative diseases. (Letter) J. Med. Genet. 43: 378-381, 2006. 2. Bryant, L., Lozynska, O., Han, G., Morgan, J. I. W., Gai, X., Maguire, A. M., Aleman, T., Bennett, J. On variants and disease-causing mutations: Case studies of a SEMA4A variant identified in inherited blindness. Ophthalmic Genet. 39: 144-146, 2018. 3. Delgoffe, G. M., Woo, S.-R., Turnis, M. E., Gravano, D. M., Guy, C., Overacre, A. E., Bettini, M. L., Vogel, P., Finkelstein, D., Bonnevier, J., Workman, C. J., Vignali, D. A. A. Stability and function of regulatory T cells is maintained by a neuropilin-1-semaphorin-4a axis. Nature 501: 252-256, 2013.

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.