Int J Endocrinol:影响BMND18患者PLS3区域突变的临床、遗传学和生物信息学表征

2018-11-13 MedSci MedSci原创

骨矿物质密度数量性状基因座18(BMND18,OMIM#300910)是由PLS3基因中的功能丧失突变引起的一种早发性成骨不全(OI),其编码plastin-3,其是关键蛋白质。在整个细胞骨架中形成肌动蛋白束。在这里,我们报告患有PLS3突变的患者导致BMND18并通过生物信息学分析评估所有报道的致病突变。 进行靶向基因测序以发现患者的致病突变基因。生物信息学分析主要包括同源建模和分子动力学

骨矿物质密度数量性状基因座18(BMND18,OMIM#300910)是由PLS3基因中的功能丧失突变引起的一种早发性成骨不全(OI),其编码plastin-3,其是关键蛋白质。在整个细胞骨架中形成肌动蛋白束。在这里,我们报告患有PLS3突变的患者导致BMND18并通过生物信息学分析评估所有报道的致病突变。

进行靶向基因测序以发现患者的致病突变基因。生物信息学分析主要包括同源建模和分子动力学刺激,以探讨先前报道的突变对plastin-3的影响。

基因测序结果显示,新的无义突变(c.745G> T,p.E249X),位于PLS3基因中含有残基p.240-266(LOOP-1)的高度保守区域。对先前报道的突变的进一步生物信息学分析揭示LOOP-1预测物理连接ABD1片段的calponin-同源性1(CH1)和CH2结构域,并在空间上位于ABD1和ABD2的界面内。它对plastin-3的构象转换和肌动蛋白结合功能至关重要。

该报告鉴定了截短PLS3基因的新突变。此外,先前报道的PLS3基因突变的生物信息学分析使我们发现了plastin-3突变的关键LOOP-1区域,其中可能对plastin-3的整体构象有害并因此影响其与肌动蛋白丝的结合。

原始出处:

Chen T, Wu H, et al., Clinical, Genetics, and Bioinformatic Characterization of Mutations Affecting an Essential Region of PLS3 in Patients with BMND18. Int J Endocrinol. 2018 Oct 14;2018:8953217. doi: 10.1155/2018/8953217. eCollection 2018.

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