Molecular basis of competition between HSF2 and catalytic subunit for binding to the PR65/A subunit of PP2A.

Molecular basis of competition between HSF2 and catalytic subunit for binding to the PR65/A subunit of PP2A.
复制标题

HSF2 和催化亚基之间竞争结合 PP2A 的 PR65/A 亚基的分子基础。

DOI:
10.1006/bbrc.2000.2733
复制
发表时间:
2000
期刊:
Biochemical and biophysical research communications.
影响因子:
--
通讯作者:
Sarge,KD
Sarge,KD
中科院分区:
--
文献类型:
--
作者:
Hong,Y;Lubert,EJ;Rodgers,DW;Sarge,KD

文献摘要

参考文献

被引文献

相似文献

我们最近发现热休克转录因子 2 (HSF2) 和蛋白磷酸酶 2A (PP2A) 的 PR65/A 亚基之间存在新的相互作用,并表明 HSF2 能够与 PP2A 催化亚基竞争与 PR65 的结合。为了在分子水平上阐明HSF2和催化亚基之间这种竞争的机制基础,我们试图表征PR65内对于与HSF2相互作用重要的序列。结果确定 PR65 的 HEAT 重复 11 内的重复内循环对于与 HSF2 的相互作用至关重要。对 PR65 环区内点突变体的分析将赖氨酸 416 确定为与 HSF2 相互作用的关键残基。有趣的是,PR65 的相同赖氨酸残基对于其与催化亚基的结合很重要。这些结果表明,HSF2干扰催化亚基与PR65结合的能力是由于HSF2和催化亚基之间竞争PR65的至少一个氨基酸残基,赖氨酸416。这些数据支持HSF2代表一种新型PP2A调节蛋白的假设。
We recently identified the existence of a novel interaction between heat shock transcription factor 2 (HSF2) and the PR65/A subunit of protein phosphatase 2A (PP2A) and showed that HSF2 is able to compete with the PP2A catalytic subunit for binding to PR65. To elucidate the mechanistic basis of this competition between HSF2 and catalytic subunit at the molecular level we have sought to characterize sequences within PR65 that are important for interaction with HSF2. The results identify the intra-repeat loop within HEAT repeat 11 of PR65 as critical for interaction with HSF2. Analysis of point mutants within this loop region of PR65 identify lysine 416 as a residue critical for interaction with HSF2. Interestingly, this same lysine residue of PR65 is important for its binding to catalytic subunit. These results suggest that HSF2's ability to interfere with catalytic subunit binding to PR65 is due to competition between HSF2 and catalytic subunit for at least one amino acid residue of PR65, lysine 416. These data support the hypothesis that HSF2 represents a new type of PP2A regulatory protein.
与蛋白磷酸酶 2A0 相关的可变亚基定义了一个新的多成员调节亚基家族。
DOI: 10.1042/bj3170187
发表时间: 1996
期刊: The Biochemical journal
影响因子: --
作者:
S. Zołnierowicz;C. V. Hoof;N. Andjelkovic;P. Cron;I. Stevens;W. Merlevede;J. Goris;B. Hemmings
通讯作者: B. Hemmings
DOI: 10.1128/mcb.12.11.4872-4882.1992
发表时间: 1992-11
影响因子: 5.3
作者:
R. Ruediger;D. Roeckel;J. Fait;Anders Bergqvist;G. Magnusson;G. Walter
通讯作者: R. Ruediger;D. Roeckel;J. Fait;Anders Bergqvist;G. Magnusson;G. Walter
DOI: --
发表时间: 1996-12
期刊: Genetics
影响因子: 3.3
作者:
P. James;J. Halladay;E. Craig
通讯作者: P. James;J. Halladay;E. Craig
DOI: --
发表时间: 1994-08
期刊: The Journal of biological chemistry
影响因子: --
作者:
C. Kamibayashi;R. Estes;R. Lickteig;S. I. Yang;C. Craft;M. Mumby
通讯作者: C. Kamibayashi;R. Estes;R. Lickteig;S. I. Yang;C. Craft;M. Mumby
DOI: 10.1128/jvi.68.1.123-129.1994
发表时间: 1994-01-01
影响因子: 5.4
作者:
RUEDIGER, R;HENTZ, M;WALTER, G
通讯作者: WALTER, G