sCD100, Recombinant, Human (Semaphorin-4D, BB18, A8, GR3)

The Semphorins are a large family of phylogenetically conserved proteins that play a pivotal role in maintaining homeostasis in the immune system.Twenty members of this family have been identified and categorized into eight subclasses based on sequence similarity and distinctive structural features.CD100, also known as Sema4D, is a 150kD transmembrane class IV semaphorin. Studies have shown that CD100 can induce monocyte migration, T-cell activation, and B-cell survival, as well as T/B cell and T/DC cooperationrdquo.The CD100 precursor contains 862 amino acids, including a 21aasignal sequence, a 713aa extracellular domain, a 21aa transmembrane sequence, and a 107aa cytoplasmic region. The extracellular sequence contains several structural features, including a 479aa semardquo domain, a 79aa Ig-like sequence, and a 52aa Plexin-type repeatrdquo. Recombinant soluble CD100 is a 78.9kD protein comprising the extracellular domain of CD100 (711 amino acids). SDS-PAGE analysis run under non-reducing conditions shows a mixture of disulfide linked dimer and monomer.\n\nBiological Activity:\nMeasured by its ability to inhibit chemokine (hMCP-3) induced human monocyte migration.\n\nAA Sequence:\nFAPIPRITWE HREVHLVQFH EPDIYNYSAL LLSEDKDTLY IGAREAVFAV NALNISEKQH EVYWKVSEDK KAKCAEKGKS KQTECLNYIR VLQPLSATSL YVCGTNAFQP ACDHLNLTSF KFLGKNEDGK GRCPFDPAHS YTSVMVDGEL YSGTSYNFLG SEPIISRNSS HSPLRTEYAI PWLNEPSFVF ADVIRKSPDS PDGEDDRVYF FFTEVSVEYE FVFRVLIPRI ARVCKGDQGG LRTLQKKWTS FLKARLICSR PDSGLVFNVL RDVFVLRSPG LKVPVFYALF TPQLNNVGLS AVCAYNLSTA EEVFSHGKYM QSTTVEQSHT KWVRYNGPVP KPRPGACIDS EARAANYTSS LNLPDKTLQF VKDHPLMDDS VTPIDNRPRL IKKDVNYTQI VVDRTQALDG TVYDVMFVST DRGALHKAIS LEHAVHIIEE TQLFQDFEPV QTLLLSSKKG NRFVYAGSNS GVVQAPLAFC GKHGTCEDCV LARDPYCAWS PPTATCVALH QTESPSRGLI QEMSGDASVC PDKSKGSYRQ HFFKHGGTAE LKCSQKSNLA RVFWKFQNGV LKAESPKYGL MGRKNLLIFN LSEGDSGVYQ CLSEERVKNK TVFQVVAKHV LEVKVVPKPV VAPTLSVVQT EGSRIATKVL VASTQGSSPP TPAVQATSSG AITLPPKPAP TGTSCEPKIV INTVPQLHSE KTMYLKSSDN R\n\nQuality Control:\nVerified by N-terminal and Mass Spectrometry analyses (when applicable).\n\nEndotoxin:\n<0.1ng/ug of protein (<1EU/ug).\n\nProtein Content:\nVerified by UV Spectroscopy and/or SDS-PAGE gel.\n\nStorage and Stability:\nStore lyophilized products at -20 degrees C. For reconstituted solutions of most products, we recommend short-term storage at 4 degrees C. For longer term storage the protein solution should be stored with a carrier protein (eg. 0.1% BSA) in working aliquots and stored frozen at -20 degrees C. Additional freeze/thaw cycles may cause some denaturation of the protein.

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