TIM-1, also known as HAVcr1 (C Hepatitis A virus cellular receptor 1) and KIM-1 (Kidney Injury Molecule 1), is a 60-100kD member of the TIM family of immune regulating adhesion proteins. The mature molecule is a type I transmembrane glycoprotein that contains a 214aa extracellular domain (ECD) and a 51aa cytoplasmic tail. The ECD contains one Ig-like V-type domain, a Ser/Thr-rich mucin region, and multiple glycosylation sites. TIM-1 is involved in the development of Th2-biased immune responses, and the presence of particular TIM-1 mutations correlates with the susceptibility to allergic disease. TIM-1 binds TIM-4 and serves as the receptor for the hepatitis A virus. It is also upregulated in renal epithelial cells following tissue injury. The extracellular domain of TIM-1 can be shed and serves as an indicator of kidney tubule damage. Within the ECD, rat TIM-1 shares 81% and 51% aa sequence identity with mouse and human TIM-1, respectively.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.