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首页> 外文期刊>Cellular Physiology and Biochemistry >The C-terminus of ICln is Natively Disordered but Displays Local Structural Preformation
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The C-terminus of ICln is Natively Disordered but Displays Local Structural Preformation

机译:ICln的C端是天然无序的,但显示局部结构形式

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ICln is a vital, ubiquitously expressed protein with roles in cell volume regulation, angiogenesis, cell morphology, activation of platelets and RNA processing. In previous work we have determined the 3D structure of the N-terminus of ICln (residues 1-159), which folds into a PH-like domain followed by an unstructured region (residues H134 – Q159) containing protein-protein interaction sites. Here we present sequence-specific resonance assignments of the C-terminus (residues Q159 – H235) of ICln by NMR, and show that this region of the protein is intrinsically unstructured. By applying sup13/supCα- sup13/supCβ secondary chemical shifts to detect possible preferences for secondary structure elements we show that the C-terminus of ICln adopts a preferred α-helical organization between residues E170 and E187, and exists preferentially in extended conformations (β-strands) between residues D161 to Y168 and E217 to T223.
机译:ICln是一种至关重要的,普遍表达的蛋白,在细胞体积调节,血管生成,细胞形态,血小板活化和RNA加工中发挥作用。在先前的工作中,我们确定了ICln N末端(残基1-159)的3D结构,该结构折叠成PH样结构域,然后折叠成一个包含蛋白质-蛋白质相互作用位点的非结构化区域(残基H134 – Q159)。在这里,我们通过NMR显示ICln的C末端(残基Q159 – H235)的序列特异性共振分配,并表明该蛋白的区域本质上是非结构化的。通过应用 13 Cα- 13 Cβ二级化学位移来检测二级结构元素的可能偏好,我们表明ICln的C末端在残基之间采用了优选的α-螺旋结构E170和E187,并且优先存在于残基D161至Y168和E217至T223之间的延伸构象(β链)中。

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