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@ARTICLE{Song:293456,
author = {Song, Jae-Geun and Kostan, Julius and Drepper, Friedel and
Knapp, Bettina and de Almeida Ribeiro, Euripedes and
Konarev, Petr V. and Grishkovskaya, Irina and Wiche,
Gerhard and Gregor, Martin and Svergun, Dmitri I. and
Warscheid, Bettina and Djinović-Carugo, Kristina},
title = {{S}tructural {I}nsights into
$\mathrm{{C}a^{2+}}$-{C}almodulin {R}egulation of {P}lectin
1a-{I}ntegrin β4 {I}nteraction in {H}emidesmosomes},
journal = {Structure},
volume = {23},
number = {3},
issn = {0969-2126},
address = {London [u.a.]},
publisher = {Elsevier Science},
reportid = {PUBDB-2016-00545},
pages = {558 - 570},
year = {2015},
abstract = {The mechanical stability of epithelial cells, whichprotect
organisms from harmful external factors, ismaintained by
hemidesmosomes via the interactionbetween plectin 1a (P1a)
and integrin a6b4. Bindingof calcium-calmodulin (Ca 2+ -CaM)
to P1a togetherwith phosphorylation of integrin b4 disrupts
thiscomplex, resulting in disassembly of hemidesmo-somes. We
present structures of the P1a actin bind-ing domain either
in complex with the N-ter lobe ofCa 2+ -CaM or with the
first pair of integrin b4 fibro-nectin domains. Ca 2+ -CaM
binds to the N-ter iso-form-specific tail of P1a in a unique
manner, via itsN-ter lobe in an extended conformation.
Structural,cell biology, and biochemical studies suggest
thefollowing model: binding of Ca 2+ -CaM to an
intrinsi-cally disordered N-ter segment of plectin
convertsit to an a helix, which repositions calmodulin
todisplace integrin b4 by steric repulsion. This modelcould
serve as a blueprint for studies aimed at under-standing how
Ca 2+ -CaM or EF-hand motifs regulateF-actin-based
cytoskeleton.},
cin = {EMBL / EMBL-User},
ddc = {570},
cid = {I:(DE-H253)EMBL-20120731 / I:(DE-H253)EMBL-User-20120814},
pnm = {899 - ohne Topic (POF3-899) / BIOSTRUCT-X - Transnational
access and enhancement of integrated Biological Structure
determination at synchrotron X-ray radiation facilities
(283570)},
pid = {G:(DE-HGF)POF3-899 / G:(EU-Grant)283570},
experiment = {EXP:(DE-H253)DORISIII(machine)-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000350886100014},
pubmed = {pmid:25703379},
doi = {10.1016/j.str.2015.01.011},
url = {https://bib-pubdb1.desy.de/record/293456},
}