Single molecule studies reveal that p53 tetramers dynamically bind response elements containing one or two half sites.
Single molecule studies reveal that p53 tetramers dynamically bind response elements containing one or two half sites.
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单分子研究表明,p53四聚体动态结合含有一个或两个半位点的反应元件。
DOI:
10.1038/s41598-020-73234-6
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发表时间:
2020-09-30
影响因子:
4.6
通讯作者:
Goodrich JA
中科院分区:
文献类型:
--
作者:
Ly E;Kugel JF;Goodrich JA
The tumor suppressor protein p53 is critical for cell fate decisions, including apoptosis, senescence, and cell cycle arrest. p53 is a tetrameric transcription factor that binds DNA response elements to regulate transcription of target genes. p53 response elements consist of two decameric half-sites, and data suggest one p53 dimer in the tetramer binds to each half-site. Despite a broad literature describing p53 binding DNA, unanswered questions remain, due partly to the need for more quantitative and structural studies with full length protein. Here we describe a single molecule fluorescence system to visualize full length p53 tetramers binding DNA in real time. The data revealed a dynamic interaction in which tetrameric p53/DNA complexes assembled and disassembled without a dimer/DNA intermediate. On a wild type DNA containing two half sites, p53/DNA complexes existed in two kinetically distinct populations. p53 tetramers bound response elements containing only one half site to form a single population of complexes with reduced kinetic stability. Altering the spacing and helical phasing between two half sites affected both the population distribution of p53/DNA complexes and their kinetic stability. Our real time single molecule measurements of full length p53 tetramers binding DNA reveal the parameters that define the stability of p53/DNA complexes, and provide insight into the pathways by which those complexes assemble.
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影响因子:
4.3
作者:
Fischer, Nicholas W.;Prodeus, Aaron;Gariepy, Jean
通讯作者:
Gariepy, Jean
DOI:
10.1073/pnas.1903077116
发表时间:
2019-04-30
影响因子:
11.1
作者:
He, Fan;Borcherds, Wade;Chen, Jiandong
通讯作者:
Chen, Jiandong
影响因子:
14.9
作者:
Aramayo R;Sherman MB;Brownless K;Lurz R;Okorokov AL;Orlova EV
通讯作者:
Orlova EV
DOI:
10.1016/j.str.2009.11.011
发表时间:
2010-02-10
期刊:
Structure (London, England : 1993)
影响因子:
--
作者:
Chen Y;Dey R;Chen L
通讯作者:
Chen L
DOI:
10.1073/pnas.1311126110
发表时间:
2013-09-17
影响因子:
11.1
作者:
Gaglia, Giorgio;Guan, Yinghua;Lahav, Galit
通讯作者:
Lahav, Galit