使用TLC-MALDI-TOF在PARP14和糖酶特异性的Peptidyl近位偏好在体外探究
Zeeshan Javed1, Hannah H Nguyen1, Kiana K Harker1
1Department of Chemistry and Biochemistry, Santa Clara University, Santa Clara, CA 95053, USA.
Molecules (Basel, Switzerland)
|August 26, 2023
概括
这项研究表明,短序列指导ADP-ribosylation (ADPr) 酶向. 研究人员开发了一种分析这些相互作用的新方法,发现了对蛋白质修饰至关重要的特定序列.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酶学 是一种酶学.
背景情况:
- ADP-ribosylation (ADPr) 是一个对细胞过程至关重要的翻译后修饰,由ADP-ribosyltransferases (ARTDs) 介导,并由糖酶逆转.
- 虽然已知许多潜在的ADPR位点,但决定ARTD标选择的序列特异性仍然在很大程度上未被描述.
- 了解序列偏好对于阐明ARTD功能和开发向治疗来说至关重要.
研究的目的:
- 开发和验证一种用于分析影响ARTD基质特异性的近位因素的新型体外方法.
- 确定指导ARTD向的最小序列,特别是使用PARP14作为模型.
- 描述ADP-ribose (ADPr) 键的稳定性,并评估糖酶的序列偏好.
主要方法:
- 开发基于飞行时间 (MALDI-TOF) 的矩阵辅助激光脱/离子化试验,用于在体外分析ARTD与基质相互作用.
- 识别PARP14介导的ADP-ribosylation所必需的最小的5mer序列.
- 在不同的pH和温度条件下测量ADP-ribose结合的稳定性,并评估ADPr-peptides上的糖酶活性.
主要成果:
- 一个最小的5分子序列被确定为PARP14针对谷氨酸/酸盐的必要和足够的,邻近的残留物也会影响向.
- 发现ADP-ribose结合的稳定性是无序的,依赖于pH值和温度,并且在几个小时内容易被非酶去除.
- 使用合成的ADPR-突出了甘油酶之间的不同活动和序列偏好.
结论:
- 矩阵辅助激光脱/离子化飞行时间 (MALDI-TOF) 是研究近接ADP-ribosyltransferase (ARTD) -基质相互作用的强大工具.
- 特定的序列在控制ARTDs转移ADP-ribose (ADPr) 以及其随后通过糖酶去除过程中发挥着关键作用.
- 这些发现为基于序列的ADP-ribosylation调节及其逆转提供了关键的见解.
关键词:
这是一种ADP-Ribose.在ADP 里糖糖胺酶.ARTDD 这是一个很棒的项目.第八条 第八条这就是为什么NAD+NAD+NAD.在PARP中,PARP是PARP.在 PARP14 中,我们可以使用 PARP14在TLC-MALDI-TOF中.更多相关视频
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