|Synonyms||Fractalkine, Neurotactin, CX3CL1|
|Description||Chemokine (C-X3-C motif) ligand 1 (CX3CL1) is a large cytokine protein of 373 amino acids. It contains multiple domains and is the only known member of the CX3C chemokine family. It is also commonly known under the names fractalkine (in humans) and neurotactin (in mice). The polypeptide structure of CXC3L1 differs from the typical structure of other chemokines. For example, the spacing of the characteristic N-terminal cysteinesis different; there are three amino acids separating the initial pair of cysteines in CX3CL1, while there are none in CC chemokines and only one in CXC chemokines. CX3CL1 is produced as a long protein (with 373-amino acid in humans) with an extended mucin-like stalk and a chemokine domain on top. The mucin-like stalk allows it to bind to the surface of certain cells. Soluble CX3CL1 potently chemoattracts T cells and monocytes, while the cell-bound chemokine promotes strong adhesion of leukocytes to activated endothelial cells, where it is primarily expressed. CX3CL1 can signal through the chemokine receptor CX3CR1.
Recombinant rat Fractalkine/CX3CL1 produced in HEK293 cells is a polypeptide chain containing 310 amino acids. A fully biologically active molecule, rrFractalkine/CX3CL1 has a molecular mass of 70-90 kDa analyzed by reducing SDS-PAGE and is obtained by chromatographic techniques at GenScript.
|Biological Activity||The EC50 value of rat Fractalkine/CX3CL1 on Ca2+ mobilization assay in CHO-K1/G15/rCX3CR1 cells (human G15 and rat CX3CR1 stably expressed in CHO-K1 cells) is less than 1 g/ml.|
QHLGMTKCNI TCHKMTSPIP VTLLIHYQLN QESCGKRAII
LETRQHRHFC ADPKEKWVQD AMKHLDHQTA ALTRNGGKFE
KRVDNVTPRI TSATRGLSPT ALAKPESATV EDLTLEPTAI
SQEARRPMGT SQEPPAAVTG SSPSTSKAQD AGLAAKPQST
GISEVAAVST TIWPSSAVYQ SGSSLWAEEK ATESPPTIAL
STQASTTSSP KQNVGSEGQP PWVQEQDSTP EKSPGPEETN
PVHTDIFQDR GPGSTVHPSV APTSSEKTPS PELVASGSQA
PKVEEPIHAT ADPQKLSVFI TPVPDSQAAT
|Measured Molecular Weight||70-90 kDa, observed by reducing SDS-PAGE.|
|Purity||> 98% as analyzed by SDS-PAGE.|
|Formulation||Lyophilized after extensive dialysis against PBS.|
|Reconstitution||Reconstituted in ddH2O or PBS at 100μg/ml.|
|Endotoxin Level||< 0.2 EU/μg, determined by LAL method.|
|Storage||Lyophilized recombinant Rat Fractalkine/CX3CL1 remains stable up to 6 months at lower than -70°C from date of receipt. Upon reconstitution, recombinant Rat Fractalkine/CX3CL1 should be stable up to 1 week at 4°C or up to 2 months at -20°C.|
|Note||For research use only|
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