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@ARTICLE{Krueger:865386,
author = {Krueger, Daniel and Quinkler, Theresa and Mortensen, Simon
Arnold and Sachse, Carsten and De Renzis, Stefano},
title = {{C}ross-linker–mediated regulation of actin network
organization controls tissue morphogenesis},
journal = {The journal of cell biology},
volume = {218},
number = {8},
issn = {1540-8140},
address = {New York, NY},
publisher = {Rockefeller Univ. Press},
reportid = {FZJ-2019-04871},
pages = {2743 - 2761},
year = {2019},
abstract = {Contraction of cortical actomyosin networks driven by
myosin activation controls cell shape changes and tissue
morphogenesis during animal development. In vitro studies
suggest that contractility also depends on the geometrical
organization of actin filaments. Here we analyze the
function of actomyosin network topology in vivo using
optogenetic stimulation of myosin-II in Drosophila embryos.
We show that early during cellularization, hexagonally
arrayed actomyosin fibers are resilient to myosin-II
activation. Actomyosin fibers then acquire a ring-like
conformation and become contractile and sensitive to
myosin-II. This transition is controlled by Bottleneck, a
Drosophila unique protein expressed for only a short time
during early cellularization, which we show regulates actin
bundling. In addition, it requires two opposing actin
cross-linkers, Filamin and Fimbrin. Filamin acts
synergistically with Bottleneck to facilitate hexagonal
patterning, while Fimbrin controls remodeling of the
hexagonal network into contractile rings. Thus, actin
cross-linking regulates the spatio-temporal organization of
actomyosin contraction in vivo, which is critical for tissue
morphogenesis.},
cin = {ER-C-3},
ddc = {570},
cid = {I:(DE-Juel1)ER-C-3-20170113},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31253650},
UT = {WOS:000478788200021},
doi = {10.1083/jcb.201811127},
url = {https://juser.fz-juelich.de/record/865386},
}