Visualization of myosin II filament dynamics in remodeling acto-myosin networks with interferometric scattering microscopy
Visualization of myosin II filament dynamics in remodeling acto-myosin networks with interferometric scattering microscopy
复制标题
用干涉散射显微镜观察重构肌动球蛋白网络中肌球蛋白 II 丝动力学的可视化
DOI:
10.1101/199778
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Mayor S
中科院分区:
文献类型:
--
作者:
Koester D;Hundt N;Young G;Fineberg A;Kukura P ;Mayor S
The plasma membrane and the underlying cytoskeletal cortex constitute active platforms for a variety of cellular processes. Recent work has shown that the remodeling acto-myosin network modifies local membrane organization, but the molecular details are only partly understood because of difficulties with experimentally accessing the relevant time and length scales. Here, we use interferometric scattering microscopy to investigate a minimal acto-myosin network linked to a supported lipid bilayer membrane. Using the magnitude of the interferometric contrast, which is proportional to molecular mass, and fast acquisition rates, we detect and image individual membrane-attached actin filaments diffusing within the acto-myosin network and follow individual myosin II filament dynamics. We quantify myosin II filament dwell times and processivity as functions of ATP concentration, providing experimental evidence for the predicted ensemble behavior of myosin head domains. Our results show how decreasing ATP concentrations lead to both increasing dwell times of individual myosin II filaments and a global change from a remodeling to a contractile state of the acto-myosin network.
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影响因子:
16.6
作者:
Saka SK;Honigmann A;Eggeling C;Hell SW;Lang T;Rizzoli SO
通讯作者:
Rizzoli SO
影响因子:
2.9
作者:
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通讯作者:
P. Schwille
影响因子:
4.6
作者:
K. Rastogi;Mohammed Shabeel Puliyakodan;V. Pandey;S. Nath;R. Elangovan
通讯作者:
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影响因子:
3.7
作者:
Rohini Shrivastava;D. Köster;Sheetal Kalme;S. Mayor;Muniasamy Neerathilingam
通讯作者:
Muniasamy Neerathilingam
DOI:
10.1016/s0021-9258(18)52391-7
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. Carlier
通讯作者:
M. Carlier