Effect of PbII on the Secondary Structure and Biological Activity of Trypsin
Effect of PbII on the Secondary Structure and Biological Activity of Trypsin
复制标题
PbII对胰蛋白酶二级结构和生物活性的影响
DOI:
10.1002/cbic.200400267
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发表时间:
2005-07
期刊:
影响因子:
--
通讯作者:
Xiuying Zhang
中科院分区:
文献类型:
--
作者:
Lin Yang;Zhiyong Gao;Ying Cao;Ruimin Xing;Xiuying Zhang
The effects of PbII on the secondary structure and biological activity of trypsin have been examined by monitoring changes in its conductivity and IR and circular dichroism (CD) spectra. The results show that PbII reacts with trypsin, and that the binding sites might be OH and NH groups in pepsin. The CD spectra indicate that interaction with PbII significantly affects the secondary structure of trypsin, the β‐sheet‐structure content being increased by about 42 %, whilst those of α‐helix and β‐turn structures are decreased by 13 % and 21 %, respectively. The results clearly demonstrate that PbII affects the biological activity of trypsin by modifying its secondary structure. Most interesting is that PbII up‐regulates the activity of trypsin at low concentrations while down‐regulating it at high concentrations.
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影响因子:
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作者:
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影响因子:
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作者:
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影响因子:
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作者:
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通讯作者:
RAO, MS
DOI:
10.1074/jbc.274.22.15510
发表时间:
1999-05
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
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通讯作者:
R. I. Saba;J. Ruysschaert;A. Herchuelz;E. Goormaghtigh