Coro1B and Coro1C regulate lamellipodia dynamics and cell motility by tuning branched actin turnover.
Coro1B and Coro1C regulate lamellipodia dynamics and cell motility by tuning branched actin turnover.
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DOI:
10.1083/jcb.202111126
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发表时间:
2022-08-01
影响因子:
7.8
通讯作者:
Bear, James E.
中科院分区:
文献类型:
--
作者:
King, Zayna T.;Butler, Mitchell T.;Hockenberry, Max A.;Subramanian, Bhagawat C.;Siesser, Priscila F.;Graham, David M.;Legant, Wesley R.;Bear, James E.
A new conditional knockout cell line for coronins clarifies important functional details about its role in regulating ADF/cofilin function. Actin filament dynamics must be precisely controlled in cells to execute behaviors such as vesicular trafficking, cytokinesis, and migration. Coronins are conserved actin-binding proteins that regulate several actin-dependent subcellular processes. Here, we describe a new conditional knockout cell line for two ubiquitous coronins, Coro1B and Coro1C. These coronins, which strongly co-localize with Arp2/3-branched actin, require Arp2/3 activity for proper subcellular localization. Coronin null cells have altered lamellipodial protrusion dynamics due to increased branched actin density and reduced actin turnover within lamellipodia, leading to defective haptotaxis. Surprisingly, excessive cofilin accumulates in coronin null lamellipodia, a result that is inconsistent with the current models of coronin–cofilin functional interaction. However, consistent with coronins playing a pro-cofilin role, coronin null cells have increased F-actin levels. Lastly, we demonstrate that the loss of coronins increases accompanied by an increase in cellular contractility. Together, our observations reveal that coronins are critical for proper turnover of branched actin networks and that decreased actin turnover leads to increased cellular contractility.
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DOI:
10.1038/nrm2867
发表时间:
2010-04
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1084/jem.20101757
发表时间:
2011-08-29
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Föger N;Jenckel A;Orinska Z;Lee KH;Chan AC;Bulfone-Paus S
通讯作者:
Bulfone-Paus S
影响因子:
7.8
作者:
Brieher, William M;Kueh, Hao Yuan;Ballif, Bryan A;Mitchison, Timothy J
通讯作者:
Mitchison, Timothy J
DOI:
10.1016/j.bbrc.2013.07.109
发表时间:
2013-09-06
影响因子:
3.1
作者:
Elam WA;Kang H;De La Cruz EM
通讯作者:
De La Cruz EM
DOI:
10.1042/bj20120209
发表时间:
2012-05-15
期刊:
The Biochemical journal
影响因子:
--
作者:
Chan KT;Roadcap DW;Holoweckyj N;Bear JE
通讯作者:
Bear JE