期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 276, 期 43, 页码 39721-39726出版社
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M105253200
关键词
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The vasopressor angiotensin II activates AT(1) and AT(2) receptors. Most of the known in vivo effects of angiotensin II are mediated by AT(1) receptors while the biological functions of AT(2) receptors are less clear. We report here that the AT(2) receptor binds directly to the AT(1) receptor and thereby antagonizes the function of the AT(1) receptor. The AT(1)-specific antagonism of the AT(2) receptor was independent of AT(2) receptor activation and signaling, and it was effective on different cells and on human myometrial biopsies with AT(1)/AT(2) receptor expression. Thus, the AT(2) receptor is the first identified example of a G-protein-coupled receptor which acts as a receptor-specific antagonist.
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