Stabilization of λ repressor against thermal denaturation by site‐directed Gly→Ala changes in α‐helix 3

Stabilization of λ repressor against thermal denaturation by site‐directed Gly→Ala changes in α‐helix 3
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通过 α 螺旋 3 中的定点 Gly→Ala 变化稳定 λ 阻遏物以防止热变饱和

DOI:
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发表时间:
1986
期刊:
影响因子:
--
通讯作者:
R. Sauer
R. Sauer
中科院分区:
--
文献类型:
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作者:
M. Hecht;J. Sturtevant;R. Sauer

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寡核苷酸定向诱变已被用于用丙氨酸替换λ阻遏物N末端结构域中的α螺旋甘氨酸。由于丙氨酸是比甘氨酸显著更好的螺旋形成残基,因此预测这些变化具有稳定作用。我们发现Gly 46 →Ala取代、Gly 48 →Ala取代和双取代使N末端结构域的解链温度增加3-6°。
Oligonucleotide‐directed mutagenesis has been used to replace α‐helical glycines in the N‐terminal domain of λ repressor with alanines. Since alanine is a significantly better helix‐forming residue than glycine, these changes were predicted to have a stabilizing effect. We show that the Gly46→Ala substitution, the Gly48→Ala substitution, and the double substitution increase the melting temperature of the N‐terminal domain by 3–6°.
DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Vershon,AK;Youderian,P;Susskind,MM;Sauer,RT
通讯作者: Sauer,RT
DOI: 10.1073/pnas.82.17.5585
发表时间: 1985-09
影响因子: 11.1
作者:
H. Scheraga
通讯作者: H. Scheraga