Structure and function of ClpXP, a AAA+ proteolytic machine powered by probabilistic ATP hydrolysis.

IF 6.2 2区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Robert T Sauer, Xue Fei, Tristan A Bell, Tania A Baker
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引用次数: 11

Abstract

ClpXP is an archetypical AAA+ protease, consisting of ClpX and ClpP. ClpX is an ATP-dependent protein unfoldase and polypeptide translocase, whereas ClpP is a self-compartmentalized peptidase. ClpXP is currently the only AAA+ protease for which high-resolution structures exist, the molecular basis of recognition for a protein substrate is understood, extensive biochemical and genetic analysis have been performed, and single-molecule optical trapping has allowed direct visualization of the kinetics of substrate unfolding and translocation. In this review, we discuss our current understanding of ClpXP structure and function, evaluate competing sequential and probabilistic mechanisms of ATP hydrolysis, and highlight open questions for future exploration.

Abstract Image

由概率ATP水解驱动的AAA+蛋白水解机ClpXP的结构和功能。
ClpXP是典型的AAA+蛋白酶,由ClpX和ClpP组成。ClpX是一种atp依赖性蛋白展开酶和多肽转位酶,而ClpP是一种自区隔肽酶。ClpXP是目前唯一具有高分辨率结构的AAA+蛋白酶,对蛋白质底物识别的分子基础已经被理解,广泛的生化和遗传分析已经进行,单分子光学捕获允许直接可视化底物展开和易位的动力学。在这篇综述中,我们讨论了我们目前对ClpXP结构和功能的理解,评估了ATP水解的竞争顺序和概率机制,并强调了未来探索的开放性问题。
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来源期刊
CiteScore
14.90
自引率
0.00%
发文量
6
期刊介绍: As the discipline of biochemistry and molecular biology have greatly advanced in the last quarter century, significant contributions have been made towards the advancement of general medicine, genetics, immunology, developmental biology, and biophysics. Investigators in a wide range of disciplines increasingly require an appreciation of the significance of current biochemical and molecular biology advances while, members of the biochemical and molecular biology community itself seek concise information on advances in areas remote from their own specialties. Critical Reviews in Biochemistry and Molecular Biology believes that well-written review articles prove an effective device for the integration and meaningful comprehension of vast, often contradictory, literature. Review articles also provide an opportunity for creative scholarship by synthesizing known facts, fruitful hypotheses, and new concepts. Accordingly, Critical Reviews in Biochemistry and Molecular Biology publishes high-quality reviews that organize, evaluate, and present the current status of high-impact, current issues in the area of biochemistry and molecular biology. Topics are selected on the advice of an advisory board of outstanding scientists, who also suggest authors of special competence. The topics chosen are sufficiently broad to interest a wide audience of readers, yet focused enough to be within the competence of a single author. Authors are chosen based on their activity in the field and their proven ability to produce a well-written publication.
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