Cell Polarity 2
Cell Polarity 2
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电池极性 2
DOI:
10.1007/978-3-319-14466-5
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
K. Ebnet
中科院分区:
文献类型:
--
作者:
K. Ebnet
Cell and tissue polarity guides a large variety of developmental processes, including the choice between symmetric and asymmetric cell division. Asymmetric divisions create cell diversity and are needed for the maintenance of tissue-specific stem cells. Symmetric divisions, on the other hand, promote exponential cell proliferation. Polarized cells often divide symmetrically by cleaving along the axis of polarity. Alternatively, cell cleavage in a plane perpendicular to the polarity axis results in asymmetric division. To control this decision, developmental cues position the mitotic spindle, which instructs the plane of cell cleavage. In animal cells, the positioning of the spindle depends on evolutionarily conserved interactions between a heterotrimeric G-protein alpha subunit, TPR–GoLoco domain protein, and NuMA-related coiled-coil protein. This trimeric complex recruits the dynein microtubule motor and captures astral microtubules at the cortex. The interplay between dynein movement and depolymerizing microtubules generates cortical pulling forces that promote aster movement and spindle positioning. Through mechanisms that are poorly understood, cell polarity and other developmental signals control the microtubule-pulling forces to instruct the orientation and plane of cell division. In this chapter, we review the current understanding of the connection between cell polarity and spindle positioning, with a focus on studies of the earlyC. elegansembryo. The nematodeC. elegansdevelops through a highly reproducible division pattern and has proven to be a powerful model for studying the regulation and execution of asymmetric cell division.
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DOI:
10.1895/wormbook.1.31.1
发表时间:
2005
期刊:
WormBook : the online review of C. elegans biology
影响因子:
--
作者:
Zahler,AlanM
通讯作者:
Zahler,AlanM
影响因子:
64.5
作者:
Shulman, JM;Benton, R;St Johnston, D
通讯作者:
St Johnston, D
影响因子:
7.2
作者:
Slaughter, Brian D.;Smith, Sarah E.;Li, Rong
通讯作者:
Li, Rong
影响因子:
4.6
作者:
Christian Schenk;H. Bringmann;A. Hyman;C. Cowan
通讯作者:
C. Cowan
影响因子:
9.2
作者:
Severson, AF;Baillie, DL;Bowerman, B
通讯作者:
Bowerman, B