Side-chain pairing preferences in the parallel coiled-coil dimer motif: insight on ion pairing between core and flanking sites.
Side-chain pairing preferences in the parallel coiled-coil dimer motif: insight on ion pairing between core and flanking sites.
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平行卷曲螺旋二聚体基序中的侧链配对偏好:对核心和侧翼位点之间离子配对的见解。
DOI:
10.1021/ja100080q
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发表时间:
2010
影响因子:
15
通讯作者:
Gellman,SamuelH
中科院分区:
文献类型:
--
作者:
Steinkruger,JayD;Woolfson,DerekN;Gellman,SamuelH
A new strategy for rapid evaluation of sequence−stability relationships in the parallel coiled-coil motif is described. The experimental design relies upon thiol−thioester exchange equilibria, an approach that is particularly well suited to examination of heterodimeric systems. Our model system has been benchmarked by demonstrating that it can quantitatively reproduce previously reported trends in interhelicala−a′side-chain pairing preferences at the coiled-coil interface. This new tool has been used to explore the role of Coulombic interactions between a core position on one helix and a flanking position on the other helix (a−g′). This type of interhelical contact has received relatively little attention to date. Our results indicate that such interactions can influence coiled-coil partner preferences.
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