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@ARTICLE{Weis:865235,
author = {Weis, Felix and Beckers, Maximilian and Hocht, Iris and
Sachse, Carsten},
title = {{E}lucidation of the viral disassembly switch of tobacco
mosaic virus},
journal = {EMBO reports},
volume = {20},
number = {11},
issn = {1469-3178},
address = {Hoboken, NJ [u.a.]},
publisher = {Wiley},
reportid = {FZJ-2019-04766},
pages = {e48451},
year = {2019},
abstract = {Stable capsid structures of viruses protect viral RNA while
they also require controlled disassembly for releasing the
viral genome in the host cell. A detailed understanding of
viral disassembly processes and the involved structural
switches is still lacking. This process has been extensively
studied using tobacco mosaic virus (TMV), and carboxylate
interactions are assumed to play a critical part in this
process. Here, we present two cryo‐EM structures of the
helical TMV assembly at 2.0 and 1.9 Å resolution in
conditions of high Ca2+ concentration at low pH and in
water. Based on our atomic models, we identify the
conformational details of the disassembly switch mechanism:
In high Ca2+/acidic pH environment, the virion is stabilized
between neighboring subunits through carboxyl groups E95 and
E97 in close proximity to a Ca2+ binding site that is shared
between two subunits. Upon increase in pH and lower Ca2+
levels, mutual repulsion of the E95/E97 pair and Ca2+
removal destabilize the network of interactions between
adjacent subunits at lower radius and release the switch for
viral disassembly.},
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:31535454},
UT = {WOS:000487086400001},
doi = {10.15252/embr.201948451},
url = {https://juser.fz-juelich.de/record/865235},
}