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在ATG7中,在脊椎动物中出现了ATG7中保存域内的新区域
Valgerdur J Hjaltalin1, Vivian Pogenberg2, Kevin Ostacolo1
1Department of Anatomy, Biomedical Center, Faculty of Medicine, University of Iceland, Sturlugata 8, 102, Reykjavik, Iceland.
在ATG7酶中新发现的一种脊椎动物特定区域 (VSR) 对于自至关重要. 这个地区 这个地区 这个地区
科学领域:
- 进化生物学是进化的生物学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 自是一种重要的细胞降解过程,在真核生物中保存着.
- ATG7是一种E1类酶,对于自是必不可少的.
- E1酶具有具有高度保守的原生细胞起源的腺化域 (AD).
研究的目的:
- 为了研究ATG7酶内的脊椎动物特定区域 (VSR) 的进化起源和功能意义.
- 探索VSR对自的影响及其在人类疾病中的潜在作用.
主要方法:
- 跨物种E1酶的比较序列分析.
- 遗传学分析以确定进化模式.
- 在缺乏VSR的细胞中进行功能性测试.
- 对VSR属性的结构预测.
- 对特定残留物作用的自然选择的分析.
主要成果:
- ATG7 包含一个独特的脊椎动物特异区域 (VSR) 在其其他高度保存的腺化域内.
- 在其他E1酶家族中,VSR不存在.
- 在VSR中的特定残留物 (D522,S531) 与人类癌症有关,S531在哺乳动物中显示出积极的选择.
- 结构预测表明VSR本质上是无序的,可能会结合大分子.
- 缺乏VSR的细胞无法进行LC3脂化,这是自的一个关键步骤.
结论:
- VSR是ATG7的进化新组成部分,在脊椎动物进化早期出现.
- VSR在自途径中发挥着关键作用,特别是在LC3脂化中.
- VSR在癌症中的潜在参与需要进一步调查.
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