Actin structure-dependent stepping of myosin 5a and 10 during processive movement.

Actin structure-dependent stepping of myosin 5a and 10 during processive movement.
复制标题

DOI:
10.1371/journal.pone.0074936
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Sakamoto T
Sakamoto T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bao J;Huck D;Gunther LK;Sellers JR;Sakamoto T

文献摘要

参考文献

被引文献

相似文献

肌球蛋白10这种非常规肌球蛋白如何沿着肌动蛋白进行持续性移动仍然存在争议。在此,我们使用单分子荧光技术(全内反射荧光显微镜技术和荧光成像纳米精度分析技术)来研究二聚化的肌球蛋白10重酶解肌球蛋白样片段在单根肌动蛋白丝以及由束捆蛋白或α-辅肌动蛋白交联的二维F - 肌动蛋白筏上的运动性和步进机制。作为对照,我们还追踪并分析了特征明确的持续性运动肌球蛋白5a的步进行为。我们已经表明,肌球蛋白10沿着单根肌动蛋白丝和F - 肌动蛋白筏以31纳米的步长持续性移动。此外,肌球蛋白10在束捆蛋白 - F - 肌动蛋白筏上比在α - 辅肌动蛋白 - F - 肌动蛋白筏上移动更具持续性,而肌球蛋白5a没有这种选择性。最后,在束捆蛋白 - F - 肌动蛋白筏上,肌球蛋白10向相邻肌动蛋白丝的侧向步移比在F - 肌动蛋白筏上的肌球蛋白5a更频繁。总之,这些结果揭示了肌球蛋白10在各种肌动蛋白结构上的更多单分子特性,这可能有助于理解其细胞功能。
How myosin 10, an unconventional myosin, walks processively along actin is still controversial. Here, we used single molecule fluorescence techniques, TIRF and FIONA, to study the motility and the stepping mechanism of dimerized myosin 10 heavy-meromyosin-like fragment on both single actin filaments and two-dimensional F-actin rafts cross-linked by fascin or α-actinin. As a control, we also tracked and analyzed the stepping behavior of the well characterized processive motor myosin 5a. We have shown that myosin 10 moves processively along both single actin filaments and F-actin rafts with a step size of 31 nm. Moreover, myosin 10 moves more processively on fascin-F-actin rafts than on α-actinin-F-actin rafts, whereas myosin 5a shows no such selectivity. Finally, on fascin-F-actin rafts, myosin 10 has more frequent side steps to adjacent actin filaments than myosin 5a in the F-actin rafts. Together, these results reveal further single molecule features of myosin 10 on various actin structures, which may help to understand its cellular functions.
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
DOI: 10.4161/cam.5.5.17723
发表时间: 2011-09-01
影响因子: 3.2
作者:
Arjonen, Antti;Kaukonen, Riina;Ivaska, Johanna
通讯作者: Ivaska, Johanna
DOI: 10.4161/cam.5.5.17644
发表时间: 2011-09-01
影响因子: 3.2
作者:
Khurana, Seema;George, Sudeep P.
通讯作者: George, Sudeep P.
DOI: 10.1038/ncb762
发表时间: 2002-03-01
影响因子: 21.3
作者:
Berg, JS;Cheney, RE
通讯作者: Cheney, RE
DOI: 10.1021/bi001701b
发表时间: 2000-11-21
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
De la Cruz, EM;Wells, AL;Ostap, EM
通讯作者: Ostap, EM