Site‐directed mutagenesis of colicin E1 provides specific attachment sites for spin labels whose spectra are sensitive to local conformation
Site‐directed mutagenesis of colicin E1 provides specific attachment sites for spin labels whose spectra are sensitive to local conformation
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大肠杆菌素 E1 的定点诱变为自旋标签提供了特定的附着位点,其光谱对局部构象敏感
DOI:
10.1002/prot.340060312
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发表时间:
1989
期刊:
影响因子:
--
通讯作者:
Wayne L. Hubell
中科院分区:
文献类型:
--
作者:
A. Todd;Jianping Cong;F. Levinthal;C. Levinthal;Wayne L. Hubell
Colicin E1 is an E. coli plasmid‐lencoded water‐soluble protein that spontaneously inserts into lipid membranes to form a voltage‐gated ion channel. We have employed a novel approach is which site‐directed mutagenesis is used to provide highly specific attachment points for nitroxide spin labels. A series of colicin mutants, differing only by the position of a single cysteine residue, were prepared and selectively labeled at that cysteine. A hydrophilic sequence (398–406) within the C‐terminal domain of the water‐soluble form of the protein was investigated and exhibited an electron paramagnetic resonancc (EPR) spectral periodicity strongly suggesting an amphiphilic α‐helix. After removal of the Nterminus of the protein with trypsin, the spectra for this sequence indicate increased label mobility and a more flexible structure.
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影响因子:
56.9
作者:
J. Reidhaar-Olson;Robert T. Sauer
通讯作者:
J. Reidhaar-Olson;Robert T. Sauer
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Brunden,KR;Uratani,Y;Cramer,WA
通讯作者:
Cramer,WA
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Farahbakhsh,ZT;Baldwin,RL;Wisnieski,BJ
通讯作者:
Wisnieski,BJ
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Dankert,JR;Uratani,Y;Grabau,C;Cramer,WA;Hermodson,M
通讯作者:
Hermodson,M