Myosin-5 varies its steps along the irregular F-actin track
Myosin-5 varies its steps along the irregular F-actin track
复制标题
Myosin-5 沿着不规则的 F-肌动蛋白轨道改变其步长
DOI:
10.1101/2023.07.16.549178
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Fineberg A
中科院分区:
文献类型:
--
作者:
Fineberg A
Molecular motors employ chemical energy to generate unidirectional mechanical output against a track. By contrast to the majority of macroscopic machines, they need to navigate a chaotic cellular environment, potential disorder in the track and Brownian motion. Nevertheless, decades of nanometer-precise optical studies suggest that myosin-5a, one of the prototypical molecular motors, takes uniform steps spanning 13 subunits (36 nm) along its F-actin track. Here, we use high-resolution interferometric scattering (iSCAT) microscopy to reveal that myosin takes strides spanning 22 to 34 actin subunits, despite walking straight along the helical actin filament. We show that cumulative angular disorder in F-actin accounts for the observed proportion of each stride length, akin to crossing a river on variably-spaced stepping stones. Electron microscopy revealed the structure of the stepping molecule. Our results indicate that both motor and track are soft materials that can adapt to function in complex cellular conditions.
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影响因子:
64.8
作者:
EGELMAN, EH;FRANCIS, N;DEROSIER, DJ
通讯作者:
DEROSIER, DJ
影响因子:
5.9
作者:
GRISCELLI, C;DURANDY, A;PRUNIERAS, M
通讯作者:
PRUNIERAS, M
DOI:
10.1073/pnas.96.24.13726
发表时间:
1999-11-23
影响因子:
11.1
作者:
De La Cruz, EM;Wells, AL;Sweeney, HL
通讯作者:
Sweeney, HL
影响因子:
64.5
作者:
CHENEY, RE;OSHEA, MK;MOOSEKER, MS
通讯作者:
MOOSEKER, MS
影响因子:
64.8
作者:
Fujii, Takashi;Iwane, Atsuko H.;Namba, Keiichi
通讯作者:
Namba, Keiichi