The effects of methyl mercury binding to microtubules.
The effects of methyl mercury binding to microtubules.
复制标题
甲基汞与微管结合的影响。
DOI:
10.1016/0041-008x(85)90392-8
复制
发表时间:
1985
影响因子:
3.8
通讯作者:
Mottet,NK
中科院分区:
文献类型:
--
作者:
Vogel,DG;Margolis,RL;Mottet,NK
The effects of methyl mercury hydroxide (MeHg) on the in vitro polymerization and depolymerization of microtubules were studied. Polymerization was totally inhibited at 3.0 × 10−5m MeHg and depolymerization occurred at concentrations above 1.0 × 10−5m MeHg, reaching a maximal rate of −0.33%/min at 5.0 × 10−5m MeHg. At or above 1.0 × 10−4m MeHg, a mercury-protein aggregate formed in both the polymerization and depolymerization systems. Fifteen free sulfhydryl groups per tubulin dimer were determined, and MeHg bound to all 15. When MeHg bound to only 2 free sulfhydryl groups per dimer, it inhibited polymerization. MeHg bound to free sulfhydryl groups exposed uniquely on the surface of microtubules, as well as those free sulfhydryl groups exposed on the ends. These results show MeHg in vitro to be a potent microtubule assembly inhibitor at ratios stoichiometric with the tubulin dimer. The effects of MeHg on microtubules are presumably mediated through MeHg binding to free sulfhydryl groups both on the ends and on the surface of microtubules. The presence of binding sites (free sulfhydryl groups) on the microtubule surface suggests multiple classes of binding sites for MeHg.
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影响因子:
5.6
作者:
Ignacio V. Sandoval;Klaus Weber
通讯作者:
Klaus Weber
DOI:
--
发表时间:
1969
期刊:
Nihon Ishikai zasshi. Journal of the Japan Medical Association
影响因子:
--
作者:
C. Ramel
通讯作者:
C. Ramel
影响因子:
2.7
作者:
KURIYAMA, R
通讯作者:
KURIYAMA, R
DOI:
10.1073/pnas.74.8.3466
发表时间:
1977-01-01
影响因子:
11.1
作者:
MARGOLIS, RL;WILSON, L
通讯作者:
WILSON, L
DOI:
--
发表时间:
1977
期刊:
影响因子:
--
作者:
D. Rożynkowa;B. Raczkiewicz
通讯作者:
B. Raczkiewicz