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DPH1和DPH2变种在人体细胞和酵母模型中赋予易感性diphthamide缺乏症综合征

Koray Ütkür¹, Klaus Mayer², Maliha Khan¹

¹Institut für Biologie, Fachgebiet Mikrobiologie , Universität Kassel, 34132 Kassel, Germany.

Disease models & mechanisms

|September 7, 2023

概括

与智力障碍相关的二胺缺乏综合征是由有缺陷的DPH1/DPH2蛋白引起的. 这项研究在这些关键基因中确定了新的缺陷易感性等位基因,进步了对罕见疾病的理解.

科学领域:

遗传学和分子生物学
人类疾病病理生理学病理生理学
生物化学生物化学

背景情况:

双胺缺乏综合征是一种自体递归性疾病,其特征是智力障碍和发育异常.
这种综合症是由于对翻译延长因子2的二甲胺合成必不可少的蛋白质活性降低导致的.
虽然已知DPH1,DPH2和DPH5会导致缺陷,但DPH1和DPH2中存在许多不具特征的变异.

研究的目的:

功能性评估人类DPH1和DPH2基因中已知和未表征的误解变异.
为了识别导致二胺缺乏综合征的新型缺陷敏感性等位基因.
了解这些变异对酶功能和潜在疾病机制的影响.

主要方法:

在保存的真核生物系统 (酵母和哺乳动物细胞) 中对DPH1和DPH2变异的功能评估.
对不同物种的蛋白质活性和保护变异影响的分析.
识别和表征功能减少的误解等位基因.

主要成果:

发现六种DPH1和DPH2变种尽管存在物种间的保护,但仍能耐受.
十个DPH1变种 (G113R,A114T,H132P,H132R,S136R,C137F,L138P,Y152C,S221P,H240R) 和两个DPH2变种 (H105P,C341Y) 的功能降低了.
这些已识别的变异被归类为缺陷敏感性等位基因,其中一些可能会影响酶的活性中心或激活.

结论:

这项研究成功地确定了DPH1和DPH2基因的功能性受损的等位基因.
这些发现提供了关于二胺缺乏综合征的遗传基础的见解.
鉴定到的变异可能有助于该综合征的临床表现,有助于诊断和研究.

关键词:

发展发展发展发展发展二甲基二甲胺的合成延长因子 2 2 延长因子智力障碍智力障碍是一种智力障碍.这是一个错误的意义.罕见疾病是一种罕见的疾病.

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