Computational Prediction of Phosphoinositide Binding to Hyperpolarization-Activated Cyclic-Nucleotide Gated Channels.
Computational Prediction of Phosphoinositide Binding to Hyperpolarization-Activated Cyclic-Nucleotide Gated Channels.
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DOI:
10.3389/fphys.2022.859087
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发表时间:
2022
影响因子:
4
通讯作者:
D'Avanzo N
中科院分区:
文献类型:
--
作者:
Claveras Cabezudo A;Feriel Khoualdi A;D'Avanzo N
Protein-lipid interactions are key regulators of ion channel function. Numerous ion channels, including hyperpolarization-activated cyclic-nucleotide gated (HCN) channels have been shown to be regulated by phosphoinositides (PIPs), with important implications in cardiac and neuronal function. Specifically, PIPs have been shown to enhance HCN activation. Using computational approaches, we aim to identify potential binding sites for HCN1-PIP interactions. Computational docking and coarse-grained simulations indicate that PIP binding to HCN1 channels is not well coordinated, but rather occurs over a broad surface of charged residues primarily in the HCN-domain, S2 and S3 helices that can be loosely organized in 2 or 3 overlapping clusters. Thus, PIP-HCN1 interactions are more resembling of electrostatic interactions that occur in myristoylated alanine-rich C kinase substrate (MARCKS) proteins, than the specifically coordinated interactions that occur in pleckstrin homology domains (PH domains) or ion channels such as inward rectifier potassium (Kir) channels. Our results also indicate that phosphatidylinositol (PI) interactions with HCN1 are even lower affinity, explaining why unphosphorylated PI have no effect on HCN1 activation unlike phosphorylated PIPs.
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影响因子:
64.8
作者:
Hansen, Scott B.;Tao, Xiao;MacKinnon, Roderick
通讯作者:
MacKinnon, Roderick
DOI:
10.1074/jbc.m110.214650
发表时间:
2011-04-29
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Flynn GE;Zagotta WN
通讯作者:
Zagotta WN
影响因子:
4.8
作者:
D'Avanzo, Nazzareno;Lee, Sun-Joo;Nichols, Colin G.
通讯作者:
Nichols, Colin G.
影响因子:
5.5
作者:
de Jong, Djurre H.;Singh, Gurpreet;Marrink, Siewert J.
通讯作者:
Marrink, Siewert J.
影响因子:
20.1
作者:
Barbuti, A;Gravante, B;DiFrancesco, D
通讯作者:
DiFrancesco, D