相关实验视频

Updated: May 13, 2025

Chemical Modification of the Tryptophan Residue in a Recombinant Ca2+-ATPase N-domain for Studying Tryptophan-ANS FRET

Chemical Modification of the Tryptophan Residue in a Recombinant Ca2+-ATPase N-domain for Studying Tryptophan-ANS FRET

Published on: October 9, 2021

对 MuF 多态毒素的腺3'-pyrophosphokinase 域进行比较研究

Eloïse M Paulet¹, Julia Bartoli¹, Atakan Kabtan¹

¹Aix Marseille Univ, CNRS, LISM (UMR7255), IMM, Marseille, France.

|April 15, 2025

概括

称为Apk2的多态毒素 (PTs),具有腺3'-pyrophosphokinase活性,在新的细菌菌体中发现. 它们保存的酶域显示出特定的ATP活性和不同的免疫机制.

科学领域:

细菌学细菌学是一门学科.
分子生物学分子生物学
遗传学遗传学是一个

背景情况:

多态毒素 (PTs) 对细菌的竞争和病变产生至关重要.
与温带菌体相关的PTs的MuF家族具有具有有毒活性的可变C终端域.
之前的研究发现了Streptococcus pneumoniae MuF毒素的C端域中的腺3 - 铁酸酶活性,称为Apk2.

研究的目的:

来自曼海米亚血解菌和巴斯图雷拉多种菌的Apk2毒素家族的新成员的特征.
研究Apk2毒素域的毒性,稳定性和酶活性.
探索免疫蛋白对抗Apk2毒素的作用和可互换性.

主要方法:

在大肠杆菌中Apk2毒素域的异质表达.
采用纯化的M.haemolytica Apk2毒素域进行了体外酶分析.
蛋白质与蛋白质相互作用测定和与免疫蛋白进行交叉保护测试.

主要成果:

来自M. haemolytica和P. multocida的两个新的Apk2毒素成员的特征.
Apk2毒素域在大肠杆菌中表现出不同的毒性水平,主要是由于稳定性差异.
纯化的M. haemolytica Apk2毒素域从ATP中特制 (p) pAppApp,类似于S. pneumoniae同类物.
免疫蛋白水解 (p) pppApp是可互换的,而那些通过蛋白质-蛋白质相互作用抑制的免疫蛋白显示出内链特异性.

结论:

该研究突出了Apk2酶域的保存特征,包括毒性和对ATP的特异性活性.
Apk2毒素具有普遍和特定的免疫机制.
了解这些毒素及其相互作用为细菌竞争和菌体生物学提供了洞察力.

关键词:

(p) pppApp 这是一个应用程序.(p) ppGpppp 这是一个很好的方法.在 Apk2 中使用 Apk2.在 MuFF MuF 氨酸3′-pyrophosphohydrolase 的使用情况氨酸3′-pyrophosphokinase的使用情况

更多相关视频

Author Spotlight: Identifying Compensatory Pathways in Malaria Parasites Containing Hypomorphic Allele of Essential Protein Kinases

Author Spotlight: Identifying Compensatory Pathways in Malaria Parasites Containing Hypomorphic Allele of Essential Protein Kinases

Published on: November 22, 2024

Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes

Assessment of Mitochondrial Functions and Cell Viability in Renal Cells Overexpressing Protein Kinase C Isozymes

Published on: January 7, 2013

相关概念视频

Allosteric Proteins-ATCase

Allosteric Proteins-ATCase

Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...