Recombinant Human TIM-1/KIM-1/HAVCR His-tag Protein, CF Summary
Ser21-Gly295, with C-terminal 6-His tag
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.|
|Reconstitution||Reconstitute at 500 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
Recombinant Human TIM-1/KIM-1/HAVCR His-tag Protein (Catalog # 11157-TM) inhibits anti-CD3-induced proliferation of stimulated human T cells. The ED50 for this effect is 0.320-4.80 μg/mL.
2 μg/lane of Recombinant Human TIM‑1/KIM‑1/HAVCR His-tag Protein (Catalog # 11157-TM) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 105-125 kDa.
T cell-immunoglobulin and mucin domain 1 (TIM-1), also known as KIM1 and HAVcr1, type I transmembrane glycoprotein in the TIM subfamily of immunoglobulin (Ig) superfamily molecules. In human, the TIM family is comprised of 3 family members and is involved in the regulation of Th1 and Th2‑cell‑mediated immune responses (1). Mature TIM-1 consists of an extracellular domain (ECD) with one V‑type Ig‑like domain and a mucin domain with O- and N-linked carbohydrates, a transmembrane segment, and a cytoplasmic signaling domain. Within the ECD, human TIM-1 shares 39% amino acid sequence identity with mouse TIM-1. Multiple TIM-1 variants can be produced either through polymorphisms or alternative splicing primarily resulting in deletions in the mucin domain (2). A soluble form of TIM-1, detectable in the urine and in circulation, can be generated through ectodomain cleavage mediated by MMP3 (3, 4). TIM-1 is expressed on splenic B cells, IL-10+ regulatory B cells, CD4+ T cells, mast cells, dendritic cells, kidney epithelium and a broad range of mucosal epithelium (5-7). It is upregulated on activated Th2 cells, after dendritic cell maturation, and on kidney tubular epithelial cells after injury (8-10). TIM-1 ligation induces T cell proliferation and promotes cytokine production (5, 11). TIM-1 serves as a receptor for phosphatidylserine, and its interaction with LMIR5 enables TIM-1 to mediate the phagocytosis of apoptotic cells (12). TIM-1 also serves as a cellular entry receptor for various viruses, including hepatitis A virus, Ebolavirus, Marburgvirus and has been indicated as a possible receptor for SARS-CoV-2 (13-15).
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