Abstract:Gas6 is a novel member of the vitamin K-dependent family of γ-carboxylated proteins and is a ligand for the receptor tyrosine kinase Axl. Gas6-Axl interactions have been shown to mediate cell survival in vascular endothelium. Although the receptor-binding portion of gas6 lies in the C-terminus, the significance of the N-terminal γ-carboxylated residues (Gla domain) is not clear. To address this question, we recombinantly produced both carboxylated and decarboxylated gas6 and confirmed that the latter is not γ-… Show more
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