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@ARTICLE{Guo:434710,
author = {Guo, Emily Z. and Desrosiers, Daniel C. and Zalesak, Jan
and Tolchard, James and Berbon, Mélanie and Habenstein,
Birgit and Marlovits, Thomas and Loquet, Antoine and Galán,
Jorge E.},
title = {{A} polymorphic helix of a {S}almonella needle protein
relays signals defining distinct steps in type {III}
secretion},
journal = {PLoS biology},
volume = {17},
number = {7},
issn = {1545-7885},
address = {Lawrence, KS},
publisher = {PLoS},
reportid = {PUBDB-2020-00264},
pages = {e3000351 -},
year = {2019},
abstract = {Type III protein-secretion machines are essential for the
interactions of many pathogenic or symbiotic bacterial
species with their respective eukaryotic hosts. The core
component of these machines is the injectisome, a
multiprotein complex that mediates the selection of
substrates, their passage through the bacterial envelope,
and ultimately their delivery into eukaryotic target cells.
The injectisome is composed of a large cytoplasmic complex
or sorting platform, a multiring base embedded in the
bacterial envelope, and a needle-like filament that
protrudes several nanometers from the bacterial surface and
is capped at its distal end by the tip complex. A
characteristic feature of these machines is that their
activity is stimulated by contact with target host cells.
The sensing of target cells, thought to be mediated by the
distal tip of the needle filament, generates an activating
signal that must be transduced to the secretion machine by
the needle filament. Here, through a multidisciplinary
approach, including solid-state NMR (SSNMR) and cryo
electron microscopy (cryo-EM) analyses, we have identified
critical residues of the needle filament protein of a
Salmonella Typhimurium type III secretion system that are
involved in the regulation of the activity of the secretion
machine. We found that mutations in the needle filament
protein result in various specific phenotypes associated
with different steps in the type III secretion process. More
specifically, these studies reveal an important role for a
polymorphic helix of the needle filament protein and the
residues that line the lumen of its central channel in the
control of type III secretion.},
cin = {CSSB-UKE / CSSB-UKE-TM},
ddc = {610},
cid = {I:(DE-H253)CSSB-UKE-20141216 /
I:(DE-H253)CSSB-UKE-TM-20210520},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-6215},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:31260457},
UT = {WOS:000478922100013},
doi = {10.1371/journal.pbio.3000351},
url = {https://bib-pubdb1.desy.de/record/434710},
}