Synthesis and Characterization of Photoactivatable Peptide Agonists of the Human Thrombin Receptor
FEBS letters(1994)
Abstract
Chemical synthesis and biochemical analysis of modified agonist peptides of the human thrombin receptor derived from the sequence SFLLRNP containing photoactivatable azido groups and biotin for sensitive detection is described. Substitution of leucine in position three with p-azidophenylalanine and extension of the C-terminus with a KGGK spacer containing biotin covalently linked to the side chain of the C-terminal lysine residue resulted in an active receptor agonist as determined by intracellular Ca2+ mobilization in human erythroleukemia (HEL) cells. In contrast, substitution of phenylalanine in position two with p-azidophenylalanine reduced agonist activity significantly.
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Key words
THROMBIN RECEPTOR,PHOTOAFFINITY LABELING,P-AZIDOPHENYLALANINE,BIOTINYLATION,CA2+ MOBILIZATION
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