Axl Products

Description

Axl, also known as Ufo and Ark, is a widely expressed 140 kDa glycoprotein in the TAM receptor tyrosine kinase family. TAM family receptors (Dtk/Tyro3, Axl, and Mer) are involved in regulation of the inflammatory response, cell survival and migration, and tumorigenesis (1). Mature cynomolgus monkey Axl consists of a 426 aa extracellular domain (ECD) that contains two Ig-like domains and two fibronectin type III domains, a 21 aa transmembrane segment, and a 422 aa cytoplasmic domain that includes the tyrosine kinase domain (2). Within the ECD, cynomolgus monkey Axl shares approximately 97% aa sequence identity with human Axl.  Axl binds the vitamin K-dependent protein Gas6 which triggers tyrosine autophosphorylation of the Axl cytoplasmic domain (3). Activation of Axl induces a broad range of activities including platelet aggregation and thrombus formation (4), macrophage and dendritic cell phagocytosis of apoptotic cells (5), NK cell development from hematopoietic progenitor cells (6), and in vivo angiogenesis (7). Axl is highly expressed in solid cancers and promotes in vivo tumorigenesis and tumor cell invasiveness (7, 8). It contributes to vascular remodeling and inflammatory cell infiltration in response to hypertension and restricted blood flow (9). It also functions as a cellular entry receptor for Gas6-opsonized lentiviruses (10). A 70-80 kDa soluble portion of the Axl ECD can be shed by proteolytic cleavage, and this fragment retains the ability to bind Gas6 (11, 12).

Bioinformatics

Uniprot	EHH59605.1
Product By Gene ID	558
Alternate Names	AI323647 ARK AXL oncogene AXL receptor tyrosine kinase AXL transforming sequence/gene Axl EC 2.7.10 EC 2.7.10.1 JTK11 Tyro7 tyrosine-protein kinase receptor UFO UFO UFOoncogene AXL

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Microglia: pruning shears for homeostatic maintenance in the brain By Jennifer Sokolowski, MD, PhD.Microglia play a critical role in pruning neurons and synapses during homeostatic maintenance in the adult brain.1 A recent study by Ayata et al. (2018) identified regional differe...    Read more.

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