Abstract:
:The motility of actin filaments interacting with heavy meromyosin molecules was directly observed on indium tin oxide-coated glass (ITO-glass), over which a surface current flowed. Because the increase in surface current applied to ITO-glass increases the temperature, we focused on the temperature-dependence of the sliding velocity and the effect of the current flow on the orientation of filament motion. Using high precision fluorescence measurements, the displacement vectors of filaments were collected at intervals of 1/30 s. The direction of filament motion was independent to that of current flow up to 0.17 A (7.7 A/m of surface current density); however, the velocity increased by approximately 2-fold when the surface temperature increased from 25 °C to 37 °C. The moving actin filaments exhibited a broader velocity distribution at high temperature than at low temperature. Collectively, these data suggest that using ITO-glass with a surface current to generate a well-controlled temperature change may serve to evaluate temperature-dependent transient responses in protein activity under a microscope, without interference from electrical effects.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Wada R,Sato D,Nakamura T,Hatori Kdoi
10.1016/j.abb.2015.10.001subject
Has Abstractpub_date
2015-11-15 00:00:00pages
51-6eissn
0003-9861issn
1096-0384pii
S0003-9861(15)30076-Xjournal_volume
586pub_type
杂志文章abstract::The cellular environment is crowded with different kinds of molecules with varying sizes, shapes and compositions. Most of the experiments studying the nature and behaviour of a protein have been done on the isolated protein in dilute buffer solutions which actually do not imitate the in vivo situation. To understand ...
journal_title:Archives of biochemistry and biophysics
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
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