Mutations that improve the binding of yeast FLP recombinase to its substrate.

Mutations that improve the binding of yeast FLP recombinase to its substrate.
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提高酵母 FLP 重组酶与其底物结合的突变。

DOI:
10.1093/genetics/118.3.393
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发表时间:
1988
期刊:
影响因子:
3.3
通讯作者:
Youderian,P
Youderian,P
中科院分区:
生物学2区
文献类型:
--
作者:
Lebreton,B;Prasad,PV;Jayaram,M;Youderian,P

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当酵母FLP重组酶在沙门氏菌宿主中从噬菌体λ PR启动子表达时,它不能有效地抑制由包括合成的靶FLP位点的操纵子/启动子区控制的操纵子。在此表型的基础上,我们已经确定了四个突变的FLP蛋白质,作为更有效的阻遏这样的操纵子。这些突变FLP蛋白中至少有两种在体内和体外更好地结合到FLP位点。一种突变体将FLP蛋白质的假定活性位点酪氨酸残基改变为苯丙氨酸,在重组中被阻断,并且与FLP位点的结合比野生型蛋白质好约5倍。作为更有效的阻遏物发挥功能的第二种突变蛋白保留催化活性。我们的结论是,真核酵母FLP重组酶,当在异源原核宿主中表达时,可以作为一个阻遏物,和突变FLP蛋白结合DNA更紧密,可以选择作为更有效的阻遏物。
When yeast FLP recombinase is expressed from the phage lambda PR promoter in a Salmonella host, it cannot efficiently repress an operon controlled by an operator/promoter region that includes a synthetic, target FLP site. On the basis of this phenotype, we have identified four mutant FLP proteins that function as more efficient repressors of such an operon. At least two of these mutant FLP proteins bind better to the FLP site in vivo and in vitro. One mutant changes the presumed active site tyrosine residue of FLP protein to phenylalanine, is blocked in recombination, and binds the FLP site about five-fold better than the wild-type protein. A second mutant protein that functions as a more efficient repressor retains catalytic activity. We conclude that the eukaryotic yeast FLP recombinase, when expressed in a heterologous prokaryotic host, can function as a repressor, and that mutant FLP proteins that bind DNA more tightly may be selected as more efficient repressors.
DOI: --
发表时间: 1972
期刊: Virology
影响因子: 3.7
作者:
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发表时间: 1987
影响因子: 11.1
作者:
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DOI: --
发表时间: 1985
期刊: Genetics
影响因子: 3.3
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DOI: 10.1101/gad.1.6.565
发表时间: 1987
影响因子: 10.5
作者:
Bass,S;Sugiono,P;Arvidson,DN;Gunsalus,RP;Youderian,P
通讯作者: Youderian,P
通过一种新方法确定 FLP 介导的重组所必需的 DNA 序列。
DOI: --
发表时间: 1985
影响因子: 4.8
作者:
R. Gronostajski;P. Sadowski
通讯作者: P. Sadowski