Anti-LTK Antibody Picoband® Fluoro647 Conjugated

LTK (Leukocyte Tyrosine Kinase), also known as TYK1, is an enzyme that in humans is encoded by the LTK gene. The protein encoded by this gene is a member of the ALK/LTK receptor family of receptor tyrosine kinases (RTKs) whose ligand is unknown. Toyoshima et al. (1993) cloned a set of cDNAs representing differently spliced human LTK mRNAs. Liao et al. (1996) found that the mouse Ltk gene is closely linked to the Tyro3 gene which maps to mouse chromosome 2. Thus, the LTK gene produces not only the putative receptor tyrosine kinase for an unknown ligand but also multiple protein products that may have different functions.

Energy Metabolism, Energy Transfer Pathways, Growth Factors/Hormones, Metabolic Signaling Pathways, Metabolism, Pathways and Processes, Protein Phosphorylation, Receptor Tyrosine Kinases, Signal Transduction, Tyrosine Kinases

Orphan receptor with a tyrosine-protein kinase activity. The exact function of this protein is not known. Studies with chimeric proteins (replacing its extracellular region with that of several known growth factor receptors, such as EGFR and CSFIR) demonstrate its ability to promote growth and specifically neurite outgrowth, and cell survival. Signaling appears to involve the PI3 kinase pathway. Involved in regulation of the secretory pathway involving endoplasmic reticulum (ER) export sites (ERESs) and ER to Golgi transport. .

1. Li, N., Nakamura, K., Jiang, Y., Tsurui, H., Matsuoka, S., Abe, M., Ohtsuji, M., Nishimura, H., Kato, K., Kawai, T., Atsumi, T., Koike, T., Shirai, T., Ueno, H., Hirose, S. Gain-of-function polymorphism in mouse and human Ltk: implications for the pathogenesis of systemic lupus erythematosus. Hum. Molec. Genet. 13: 171-179, 2004. 2. Liao, X., Zhou, R., Gilbert, D. J., Copeland, N. G., Jenkins, N. A. Receptor tyrosine kinase gene Tyro3 maps to mouse chromosome 2, closely linked to Ltk. Mammalian Genome 7: 395-396, 1996. 3. Toyoshima, H., Kozutsumi, H., Maru, Y., Hagiwara, K., Furuya, A., Mioh, H., Hanai, N., Takaku, F., Yazaki, Y., Hirai, H. Differently spliced cDNAs of human leukocyte tyrosine kinase receptor tyrosine kinase predict receptor proteins with and without a tyrosine kinase domain and a soluble receptor protein. Proc. Nat. Acad. Sci. 90: 5404-5408, 1993.