ClpXP, an ATP-powered unfolding and protein-degradation machine.

ClpXP, an ATP-powered unfolding and protein-degradation machine.
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DOI:
10.1016/j.bbamcr.2011.06.007
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发表时间:
2012-01
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Sauer RT
Sauer RT
中科院分区:
其他
文献类型:
--
作者:
Baker TA;Sauer RT

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ClpXP是一种AAA+蛋白酶,其在细胞内靶向蛋白降解期间使用ATP结合和水解的能量来进行机械功。ClpXP由AAA+ ATP酶(ClpX)和十四聚体肽酶(ClpP)的六聚体组成。不对称ClpX六聚体结合蛋白质底物中的非结构化肽标签,在底物中展开稳定的三级结构,然后将展开的多肽链易位到ClpP中的内部蛋白水解区室中。在这里,我们回顾我们目前的了解ClpXP的结构和功能,揭示了二十年的生物化学和生物物理学研究。
ClpXP is a AAA+ protease that uses the energy of ATP binding and hydrolysis to perform mechanical work during targeted protein degradation within cells. ClpXP consists of hexamers of a AAA+ ATPase (ClpX) and a tetradecameric peptidase (ClpP). Asymmetric ClpX hexamers bind unstructured peptide tags in protein substrates, unfold stable tertiary structure in the substrate, and then translocate the unfolded polypeptide chain into an internal proteolytic compartment in ClpP. Here, we review our present understanding of ClpXP structure and function, as revealed by two decades of biochemical and biophysical studies.
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