相关实验视频

Updated: Jun 12, 2025

Amide Hydrogen/Deuterium Exchange & MALDI-TOF Mass Spectrometry Analysis of Pak2 Activation

Amide Hydrogen/Deuterium Exchange & MALDI-TOF Mass Spectrometry Analysis of Pak2 Activation

Published on: November 26, 2011

使用H/D交换质谱测量绘制Pup结合酶PafA的结构异质性的地图

Alicia Plourde¹, Jacquelyn C Ogata-Bean¹, Siavash Vahidi¹

¹Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada.

The Journal of biological chemistry

|March 23, 2025

概括

细菌的Pup-蛋白酶体系统

科学领域:

生物化学生物化学
分子生物学分子生物学
结构生物学结构生物学

背景情况:

幼蛋白酶体系统 (PPS) 对细菌的生存至关重要,特别是在Mycobacterium tuberculosis中.
由PafA结合酶催化的幼化标记了蛋白质的降解.
PafA的寡合状态和目标相互作用机制尚未完全理解.

研究的目的:

调查PafA的寡合状态和构造动态.
为了确定核酸结合和二元化如何影响PafA的功能.

主要方法:

-交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法 (HDX-MS). 交换质谱法.
互补的生物物理技术.

主要成果:

再组合PafA存在于溶液中的单体和域互换二元体.
核酸结合稳定了PafA二元体,但导致了催化不活的构造.
HDX-MS确定了参与PafA二分化的关键区域,并揭示了核酸诱导的单体结构变化.

结论:

PafA具有显著的结构可塑性,存在于多个寡合体状态.
核酸结合和二聚化在调节PafA的酶活性中起着复杂的作用.
研究结果提供了关于这种必不可少的细菌蛋白质分解酶的功能调节的见解.

关键词:

幼-蛋白酶体系统酶结构酶结构交换的质谱学质谱学.蛋白质构成的结构.蛋白质稳定性蛋白质稳定性幼化 (pupylation) 是一种发生在幼的过程.结构-功能的结构-功能.

更多相关视频

Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry

Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry

Published on: November 29, 2013

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions

Published on: June 23, 2022

相关概念视频

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...

¹H NMR of Labile Protons: Deuterium (²H) Substitution

¹H NMR of Labile Protons: Deuterium (²H) Substitution

This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is the use of deuterium. Amongst the three isotopes of hydrogen, deuterium (2H) has a nucleus composed of one proton and one neutron. When the D2O solvent is added to a pure dry ethanol solution, its labile proton is substituted with deuterium.