TY - JOUR
T1 - Structural basis for selectivity and diversity in angiotensin II receptors
AU - Zhang, Haitao
AU - Han, Gye Won
AU - Batyuk, Alexander
AU - Ishchenko, Andrii
AU - White, Kate L.
AU - Patel, Nilkanth
AU - Sadybekov, Anastasiia
AU - Zamlynny, Beata
AU - Rudd, Michael T.
AU - Hollenstein, Kaspar
AU - Tolstikova, Alexandra
AU - White, Thomas A.
AU - Hunter, Mark S.
AU - Weierstall, Uwe
AU - Liu, Wei
AU - Babaoglu, Kerim
AU - Moore, Eric L.
AU - Katz, Ryan D.
AU - Shipman, Jennifer M.
AU - Garcia-Calvo, Margarita
AU - Sharma, Sujata
AU - Sheth, Payal
AU - Soisson, Stephen M.
AU - Stevens, Raymond C.
AU - Katritch, Vsevolod
AU - Cherezov, Vadim
N1 - Publisher Copyright:
© 2017 Macmillan Publishers Limited, part of Springer Nature.
PY - 2017/4/20
Y1 - 2017/4/20
N2 - The angiotensin II receptors AT1 R and AT2 R serve as key components of the renin-angiotensin-aldosterone system. AT1 R has a central role in the regulation of blood pressure, but the function of AT2 R is unclear and it has a variety of reported effects. To identify the mechanisms that underlie the differences in function and ligand selectivity between these receptors, here we report crystal structures of human AT2 R bound to an AT2 R-selective ligand and to an AT 1 R/AT2 R dual ligand, capturing the receptor in an active-like conformation. Unexpectedly, helix VIII was found in a non-canonical position, stabilizing the active-like state, but at the same time preventing the recruitment of G proteins or β-arrestins, in agreement with the lack of signalling responses in standard cellular assays. Structure-activity relationship, docking and mutagenesis studies revealed the crucial interactions for ligand binding and selectivity. Our results thus provide insights into the structural basis of the distinct functions of the angiotensin receptors, and may guide the design of new selective ligands.
AB - The angiotensin II receptors AT1 R and AT2 R serve as key components of the renin-angiotensin-aldosterone system. AT1 R has a central role in the regulation of blood pressure, but the function of AT2 R is unclear and it has a variety of reported effects. To identify the mechanisms that underlie the differences in function and ligand selectivity between these receptors, here we report crystal structures of human AT2 R bound to an AT2 R-selective ligand and to an AT 1 R/AT2 R dual ligand, capturing the receptor in an active-like conformation. Unexpectedly, helix VIII was found in a non-canonical position, stabilizing the active-like state, but at the same time preventing the recruitment of G proteins or β-arrestins, in agreement with the lack of signalling responses in standard cellular assays. Structure-activity relationship, docking and mutagenesis studies revealed the crucial interactions for ligand binding and selectivity. Our results thus provide insights into the structural basis of the distinct functions of the angiotensin receptors, and may guide the design of new selective ligands.
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U2 - 10.1038/nature22035
DO - 10.1038/nature22035
M3 - Article
C2 - 28379944
AN - SCOPUS:85017413904
SN - 0028-0836
VL - 544
SP - 327
EP - 332
JO - Nature
JF - Nature
IS - 7650
ER -