Functional analysis of a cardiac myosin rod in Dictyostelium discoideum.
Functional analysis of a cardiac myosin rod in Dictyostelium discoideum.
复制标题
盘基网柄菌心肌肌球蛋白棒的功能分析。
DOI:
10.1002/cm.970270404
复制
发表时间:
1994
影响因子:
--
通讯作者:
Leinwand,LA
中科院分区:
文献类型:
--
作者:
LeBlanc-Straceski,JM;Fukui,Y;Sohn,RL;Spudich,JA;Leinwand,LA
Manipulation of the single conventional myosin heavy chain (mhc) gene in Dictyostelium discoideum (Dd) has delineated an essential role for the filament-forming, or light meromyosin (LMM) domain of the myosin molecule in cyto-kinesis, development, and in the capping of cell surface receptors (see Spudich: Cell Regulation 1: 1–11, 1989; Egelhoff et al.: Journal of Cell Biology, 112: 677–688, 1991a). In order to assess the functional relationship between sarcomeric and cytoplasmic myosins, a chimeric gene encoding the Dd myosin head and subfragment 2 fused to rat β cardiac LMM was transfected into both wild-type and Dd mhc null cells. Chimeric myosin was organized into dense cortical patches in the cytoplasm of both wild-type and Dd mhc null cells. Although null cells expressing chimeric mhc at∼ 10% of Dd mhc levels were unable to grow in shaking suspension or to complete development, chimeric myosin was able to rescue capping of cell surface receptors, to associate with filamentous actin, and to localize to the correct subcellular position during aggregation. Deletion of 29 amino acids in the rod corresponding to a previously defined filament assembly competent region eliminated the cortical patches and the posterior localization during chemotaxis. Taken together, these observations suggest that sarcomeric and cytoplasmic myosin rods are functionally interchangeable in several aspects of nonmuscle motility.© 1994 Wiley-Liss, Inc.
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DOI:
10.1002/j.1460-2075.1984.tb02289.x
发表时间:
1984
期刊:
The EMBO Journal
影响因子:
--
作者:
K. Pagh;H. Maruta;M. Claviez;G. Gerisch
通讯作者:
G. Gerisch
影响因子:
4.8
作者:
J. Vaillancourt;C. Lyons;G. Côté
通讯作者:
G. Côté
影响因子:
--
作者:
Yoshio Fukui;S. Yumura;Toshiko K. Yumura
通讯作者:
Toshiko K. Yumura
影响因子:
7.8
作者:
J. Condeelis
通讯作者:
J. Condeelis
影响因子:
5.3
作者:
D. Knecht;S. Cohen;W. Loomis;H. Lodish
通讯作者:
H. Lodish