The linker pivot in Ci-VSP: the key to unlock catalysis.
The linker pivot in Ci-VSP: the key to unlock catalysis.
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DOI:
10.1371/journal.pone.0070272
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Friedrich T
中科院分区:
文献类型:
--
作者:
Hobiger K;Utesch T;Mroginski MA;Seebohm G;Friedrich T
In the voltage-sensitive phosphatase Ci-VSP, conformational changes in the transmembrane voltage sensor domain (VSD) are transduced to the intracellular catalytic domain (CD) leading to its dephosphorylation activity against membrane-embedded phosphoinositides. The linker between both domains is proposed to be crucial for the VSD-CD coupling. With a combined approach of electrophysiological measurements on Xenopus oocytes and molecular dynamics simulations of a Ci-VSP model embedded in a lipid bilayer, we analyzed how conformational changes in the linker mediate the interaction between the CD and the activated VSD. In this way, we identified specific residues in the linker that interact with well-defined amino acids in one of the three loops forming the active site of the protein, named TI loop. With our results, we shed light into the early steps of the coupling process between the VSD and the CD, which are based on fine-tuned electrostatic and hydrophobic interactions between the linker, the membrane and the CD.
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影响因子:
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作者:
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通讯作者:
MacKinnon, Roderick
影响因子:
1.7
作者:
VANGUNSTEREN, WF;BERENDSEN, HJC
通讯作者:
BERENDSEN, HJC
影响因子:
4.4
作者:
FELLER, SE;ZHANG, YH;BROOKS, BR
通讯作者:
BROOKS, BR
影响因子:
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作者:
JORGENSEN, WL;CHANDRASEKHAR, J;KLEIN, ML
通讯作者:
KLEIN, ML
DOI:
10.1085/jgp.200910215
发表时间:
2009-07
期刊:
The Journal of general physiology
影响因子:
--
作者:
Villalba-Galea CA;Miceli F;Taglialatela M;Bezanilla F
通讯作者:
Bezanilla F