Secretory vesicle transport velocity in living cells depends on the myosin-V lever arm length.

Secretory vesicle transport velocity in living cells depends on the myosin-V lever arm length.
复制标题

DOI:
10.1083/jcb.200110086
复制
发表时间:
2002-01-07
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Bretscher A
Bretscher A
中科院分区:
其他
文献类型:
--
作者:
Schott DH;Collins RN;Bretscher A

文献摘要

参考文献

被引文献

相似文献

肌球蛋白是对肌动蛋白细丝施加力的分子马达。肌球蛋白是一类被广泛保守的肌球蛋白,它将细胞器招募到动物和真菌细胞中的两极位置。然而,目前还不清楚肌球蛋白-V是否主动运输细胞器,以及最近为肌肉肌球蛋白开发的杠杆臂模型是否适用于肌球蛋白-V。在这里,我们展示了在活的、完整的酵母中,分泌囊泡迅速地向它们的胞吐部位移动。最大速度在由MYO2基因编码的肌球蛋白-V重链上经过基因工程改造的杠杆臂长度范围内呈线性变化。因此,分泌囊泡的极化是通过肌球蛋白V的主动转运实现的,其运动机制符合杠杆臂模型。
Myosins are molecular motors that exert force against actin filaments. One widely conserved myosin class, the myosin-Vs, recruits organelles to polarized sites in animal and fungal cells. However, it has been unclear whether myosin-Vs actively transport organelles, and whether the recently challenged lever arm model developed for muscle myosin applies to myosin-Vs. Here we demonstrate in living, intact yeast that secretory vesicles move rapidly toward their site of exocytosis. The maximal speed varies linearly over a wide range of lever arm lengths genetically engineered into the myosin-V heavy chain encoded by the MYO2 gene. Thus, secretory vesicle polarization is achieved through active transport by a myosin-V, and the motor mechanism is consistent with the lever arm model.
MLC1P是酿酒酵母中非常规肌球蛋白肌球蛋白肌球蛋白肌球蛋白的轻链。
DOI: 10.1083/jcb.142.3.711
发表时间: 1998-08-10
期刊: The Journal of cell biology
影响因子: --
作者:
Stevens RC;Davis TN
通讯作者: Davis TN
DOI: 10.1016/s0092-8674(05)80080-7
发表时间: 1993-10-08
期刊: CELL
影响因子: 64.5
作者:
CHENEY, RE;OSHEA, MK;MOOSEKER, MS
通讯作者: MOOSEKER, MS
DOI: 10.1091/mbc.8.8.1481
发表时间: 1997-08-01
影响因子: 3.3
作者:
Mulholland, J;Wesp, A;Botstein, D
通讯作者: Botstein, D
DOI: 10.1083/jcb.147.4.791
发表时间: 1999-11-15
期刊: The Journal of cell biology
影响因子: --
作者:
通讯作者: --
DOI: 10.1093/oxfordjournals.jbchem.a022699
发表时间: 2000-06-01
影响因子: 2.7
作者:
Kashiyama, T;Kimura, N;Yamamoto, K
通讯作者: Yamamoto, K