需要CRTAP进行prolyl-3氧化,并且突变会导致衰退性骨质生成不完美
Roy Morello1, Terry K Bertin, Yuqing Chen
1Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.
Cell
|October 24, 2006
概括
软骨相关蛋白 (CRTAP) 缺乏会损害prolyl-3-hydroxylation,导致骨和软骨疾病,如骨质不完善性. 这突显了CRTAP在原结构和结缔组织健康中的关键作用.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 基化是一种重要的翻译后修饰,影响蛋白质的结构和功能.
- 在原蛋白中,prolyl 3-氧化是必不可少的,但它的生物作用仍然在很大程度上是未知的.
- 蛋白质CRTAP (软骨相关蛋白) 与prolyl-3-hydroxylases同源,但缺乏二氧化酶域.
研究的目的:
- 通过CRTAP调解的普罗利尔3-氧化酶的生物学意义.
- 阐明CRTAP在原修饰和纤维化发生中的作用.
- 了解CRTAP功能与结合组织疾病之间的联系.
主要方法:
- 对Crtap缺乏的小鼠模型的分析.
- 生物化学试验,以评估原蛋白中的prolyl-3-基化水平.
- 在突变组织中检查原体结构和纤维细胞形态.
- CRTAP突变与人类结缔组织疾病的相关性.
主要成果:
- 在小鼠中,Crtap的丧失导致了带有严重骨质疏松症的骨质软骨质疏松症.
- 克拉普缺乏导致原蛋白的prolyl-3-hydroxylation减少,并改变了原蛋白纤维的直径.
- CRTAP与P3H1和CYPB形成一个复合体,影响原蛋白的修饰.
- 人类CRTAP的突变与衰退性骨质生成不完美型II和VII有关.
结论:
- 对于正确的原蛋白的prolyl-3-hydroxylation,CRTAP是必不可少的.
- 通过CRTAP介导的prolyl-3-hydroxylation的失调是连接组织疾病的潜在机制.
- 改变的原纤维生成和结构有助于CRTAP缺乏个体观察到的病理.
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