TIM-1 (T cell-immunoglobulin-mucin; also KIM-1 and HAVcr-1) is a 100 kDa, type I transmembrane glycoprotein member of the TIM family of immunoglobulin superfamily molecules. This gene family is involved in the regulation of Th1 and Th2 cell mediated immunity. Human TIM-1 is synthesized as a 359 amino acid (aa) precursor that contains a 20 aa signal sequence, a 270 aa extracellular domain (ECD), a 21 aa transmembrane segment and a 48 aa cytoplasmic domain. The ECD contains one V-type Ig like domain and a mucin region characterized by multiple PTTTTL motifs. The mucin region undergoes extensive O-linked glycosylation.
The TIM-1 gene is highly polymorphic and undergoes alternate splicing. For instance, the presence of a six aa sequence (MTTTVP) at position #137 of the mature molecule is associated with protection from atopy in people with a history of hepatitis A. There are two cytoplasmic alternate splice forms of TIM-1. One is a long (359 aa) kidney form termed TIM-1b, and one is a short (334 aa) liver form termed TIM-1a. Both are identical through the first 323 aa of their precursors. TIM-1b contains a tyrosine phosphorylation motif that is not present in TIM-1a. TIM-1 is also known to circulate as a soluble form. Constitutive cleavage by an undefined MMP (possibly ADAM33) releases an 85-90 kDa soluble molecule. The ECD of human TIM-1 is 50% and 43% aa identical to mouse and canine TIM-1 ECD, respectively. The only two reported ligands for TIM-1 are TIM-4 and the hepatitis A virus. However, others are believed to exist, and based on the ligand for TIM-3, one may well be an S-type lectin. TIM1 ligation induces T cell proliferation and promotes cytokine production.
原厂资料：
Product Summary:
The Quantikine Rat TIM-1 Immunoassay is a 4.5 hour solid-phase ELISA designed to measure rat TIM-1 in cell culture supernates, tissue homogenates, serum, plasma, and urine. It contains NS0-expressed recombinant rat TIM-1 and antibodies raised against the recombinant factor. This immunoassay has been shown to accurately quantitate the recombinant factor. Results obtained using natural rat TIM-1 showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring rat TIM-1.
Precision:
Intra-Assay Precision (Precision within an assay)Three samples of known concentration were tested on one plate to assess intra-assay precision.
Inter-Assay Precision (Precision between assays)Three samples of known concentration were tested in separate assays to assess inter-assay precision.
The recovery of rat TIM-1 spiked to three levels throughout the range of the assay in various matrices was evaluated.
Sample Type
Average % Recovery
Range %
Serum (n=4)
102
82-112
Heparin Plasma (n=4)
102
95-114
Cell Culture Supernates (n=5)
96
93-99
EDTA Plasma (n=4)
99
84-107
Urine (n=4)
103
87-117
Linearity:
To assess the linearity of the assay, samples containing or spiked with rat TIM-1 in each matrix were diluted with Calibrator Diluent and then assayed.
京公网安备11010802025653 版权所有：北京逸优科技有限公司
