高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (9): 1349.

• 论文 • 上一篇    下一篇

银诱导大鼠肝脏金属硫蛋白的提纯与鉴定

黄仲贤, 郑起, 顾伟强, 王韵华   

  1. 复旦大学化学系, 上海, 200433
  • 收稿日期:1995-09-21 出版日期:1996-09-24 发布日期:1996-09-24
  • 通讯作者: 黄仲贤,男,56岁,教授.
  • 作者简介:黄仲贤,男,56岁,教授.
  • 基金资助:

    国家自然科学基金

Purification and Characterization of Silver-Induced Metallothionein in Rat Liver

HUANG Zhong-Xian, ZHENG Qi, GU Wei-Qiang, WANG Yun-Hua   

  1. Department of Chemistry, Fudan University, Shanghai, 200433
  • Received:1995-09-21 Online:1996-09-24 Published:1996-09-24

摘要: Wistar公鼠经腹腔注射AgNO3后可诱导肝脏合成MT.经匀浆、乙醇沉降、Sephadex-75、DEAE-52两次柱层析,可得到两个亚型。原子吸收测定结果表明:该蛋白分别含7份Ag、2份Zn和2份Cu,具有与Cd5Zn2-MT并不相同的二级、三级结构。进一步研究表明,蛋白中伴随Cu和Zn的含量与所用诱发剂的种类、数量均有关,且Cu和Zn(通过MT)具有某种微妙的联系。

关键词: 银, 金属硫蛋白, 金属调节

Abstract: The rat liver metallothionein was induced by subactaneous injections of silver nitrate and was purified to homogeneity by using homogenization, ethanol precipitation, Sephadex G-75 chromatography and chromatography on DEAE-52.Anion exchange chromatography yielded two isoforms of metallothionein, MT-1 and MT-2, in which the molar ratios of Ag-, Zn2- and Cu+ bound are 7,2 and 2,respectively.It was also found that the ratios were slightly affected by the dose of silver nitrate, which indicate that the two endogenous essential metals, Cu and Zn, accompanying silver showed competition with the exogenous heavy metal ions.MThas different selectivities towards metals.

Key words: Silver, Metallothionein, Metal regulation

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