CD55, also known as complement decay-accelerating factor isoform 1, is a membrane protein that attaches to cell membrane via a glycophosphatidylinositol (GPI) anchor. It contains four complement control protein repeats (CCPs) with a single N-linked glycan positioned between CCPs 1 and 2. It regulates the complement system on the cell surface. It is used as a receptor by some coxsackieviruses and other enteroviruses. It is broadly distributed among hematopoietic and non-hematopoietic cells. It is a determinant for the Cromer blood group system. It plays a role promotion of tumorigenesis, decrease of complement mediated tumor cell lysis, autocrine loops for cell rescue and evasion of apoptosis, neoangiogenesis, invasiveness, cell motility. Recombinant human CD55, fused to His-Tag at C-terminal, expressed in insect cell and purified by using conventional chromatography techniques. Source: Recombinant protein corresponding to aa35-353 of human CD55, fused to His-Tag at C-terminal, expressed in insect cell. Molecular Weight: ~36kD (328aa), ~40-57kD (SDS-PAGE under reducing conditions) Endotoxin: <1EU/1ug (determined by LAL method) AA Sequence: ADPDCGLPPD VPNAQPALEG RTSFPEDTVI TYKCEESFVK IPGEKDSVIC LKGSQWSDIE EFCNRSCEVP TRLNSASLKQ PYITQNYFPV GTVVEYECRP GYRREPSLSP KLTCLQNLKW STAVEFCKKK SCPNPGEIRN GQIDVPGGIL FGATISFSCN TGYKLFGSTS SFCLISGSSV QWSDPLPECR EIYCPAPPQI DNGIIQGERD HYGYRQSVTY ACNKGFTMIG EHSIYCTVNN DEGEWSGPPP ECRGKSLTSK VPPTVQKPTT VNVPTTEVSP TSQKTTTKTT TPNAQATRST PVSRTTKHFH ETTPNKGSGT TSHHHHHH Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
