Modulation of T4 gene 32 protein DNA binding activity by the recombination mediator protein UvsY.
Modulation of T4 gene 32 protein DNA binding activity by the recombination mediator protein UvsY.
复制标题
重组介体蛋白 UvsY 对 T4 基因 32 蛋白 DNA 结合活性的调节。
DOI:
10.1016/j.jmb.2008.05.039
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发表时间:
2008
影响因子:
5.6
通讯作者:
Williams,MarkC
中科院分区:
文献类型:
--
作者:
Pant,Kiran;Shokri,Leila;Karpel,RichardL;Morrical,ScottW;Williams,MarkC
Bacteriophage T4 UvsY is a recombination mediator protein that promotes assembly of the UvsX-ssDNA presynaptic filament. UvsY helps UvsX to displace T4 gene 32 protein (gp32) from ssDNA, a reaction necessary for proper formation of the presynaptic filament. Here we use DNA stretching to examine UvsY interactions with single DNA molecules in the presence and absence of gp32 and a gp32 C-terminal truncation (*I), and show that in both cases UvsY is able to destabilize gp32-ssDNA interactions. In these experiments UvsY binds more strongly to dsDNA than ssDNA due to its inability to wrap ssDNA at high forces. To support this hypothesis, we show that ssDNA created by exposure of stretched DNA to glyoxal is strongly wrapped by UvsY, but wrapping occurs only at low forces. Our results demonstrate that UvsY interacts strongly with stretched DNA in the absence of other proteins. In the presence of gp32 and *I, UvsY is capable of strongly destabilizing gp32-DNA complexes in order to facilitate ssDNA wrapping, which in turn prepares the ssDNA for presynaptic filament assembly in the presence of UvsX. Thus, UvsY mediates UvsX binding to ssDNA by converting rigid gp32-DNA filaments into a structure that can be strongly bound by UvsX.
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DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Jiang,H;Giedroc,D;Kodadek,T
通讯作者:
Kodadek,T
影响因子:
2.9
作者:
M. Sweezy;S. Morrical
通讯作者:
M. Sweezy;S. Morrical
影响因子:
3.4
作者:
Williams, MC;Wenner, JR;Bloomfield, VA
通讯作者:
Bloomfield, VA
影响因子:
64.8
作者:
B. Alberts;L. Frey
通讯作者:
L. Frey
影响因子:
3.4
作者:
Williams, MC;Wenner, JR;Bloomfield, VA
通讯作者:
Bloomfield, VA