Myosin-induced changes in F-actin: fluorescence probing of subdomain 2 by dansyl ethylenediamine attached to Gln-41.
Myosin-induced changes in F-actin: fluorescence probing of subdomain 2 by dansyl ethylenediamine attached to Gln-41.
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肌球蛋白诱导的 F-肌动蛋白变化:通过连接 Gln-41 的丹酰乙二胺对子结构域 2 进行荧光探测。
DOI:
10.1016/s0006-3495(96)79703-5
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发表时间:
1996
影响因子:
3.4
通讯作者:
Reisler,E
中科院分区:
文献类型:
--
作者:
Kim,E;Miller,CJ;Motoki,M;Seguro,K;Muhlrad,A;Reisler,E
Actin labeled at Gln-41 with dansyl ethylenediamine (DED) via transglutaminase reaction was used for monitoring the interaction of myosin subfragment 1 (S1) with the His-40-Gly-42 site in the 38–52 loop on F-actin. Proteolytic digestions of F-actin with subtilisin and trypsin, and acto-S1 ATPase measurements on heat-treated F-actin revealed that the labeling of Gln-41 had a stabilizing effect on subdomain 2 and the actin filaments. DED on Gln-41 had no effect on the values of K(m) and Vmax of the acto-S1 ATPase and the sliding velocities of actin filaments in the in vitro motility assays. This suggests either that S1 does not bind to the 40–42 site on actin or that such binding is not functionally important. The binding of monoclonal antidansyl IgG to DED-F-actin did not affect acto-S1 binding in the absence of nucleotides, indicating that the 40–42 site does not contribute much to rigor acto-S1 binding. Myosin-induced changes in subdomain 2 on actin were manifested through an increase in the fluorescence of DED-F-actin, a decrease in the accessibility of the probe to collisional quenchers, and a partial displacement of antidansyl IgG from actin by S1. It is proposed that these changes in the 38–52 loop on actin originate from S1 binding to other myosin recognition sites on actin.
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DOI:
10.1016/s0021-9258(17)43493-4
发表时间:
1984-02
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
B. Mariani;R. Schimke
通讯作者:
B. Mariani;R. Schimke
影响因子:
3.4
作者:
Lin,SL;Takii,M;Ts'o,PO
通讯作者:
Ts'o,PO
DOI:
10.1016/0167-4781(82)90023-9
发表时间:
1982
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
I. Radford;R. F. Martin;L. R. Finch;G. Hodgson
通讯作者:
G. Hodgson
影响因子:
11.2
作者:
Hahn,P;Kapp,LN;Morgan,WF;Painter,RB
通讯作者:
Painter,RB
影响因子:
64.5
作者:
M. Zajac;P. Ts'o
通讯作者:
P. Ts'o