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@ARTICLE{Krishnamurthy:943337,
author = {Krishnamurthy, Srinath and Sardis, Marios-Frantzeskos and
Eleftheriadis, Nikolaos and Chatzi, Katerina E. and Smit,
Jochem H. and Karathanou, Konstantina and Gouridis, Giorgos
and Portaliou, Athina G. and Bondar, Ana-Nicoleta and
Karamanou, Spyridoula and Economou, Anastassios},
title = {{P}reproteins couple the intrinsic dynamics of {S}ec{A} to
its {ATP}ase cycle to translocate via a catch and release
mechanism},
journal = {Cell reports},
volume = {38},
number = {6},
issn = {2211-1247},
address = {[New York, NY]},
publisher = {Elsevier},
reportid = {FZJ-2023-00943},
pages = {110346 -},
year = {2022},
abstract = {Protein machines undergo conformational motions to interact
with and manipulate polymeric substrates. The Sec
translocase promiscuously recognizes, becomes activated, and
secretes >500 non-folded preprotein clients across bacterial
cytoplasmic membranes. Here, we reveal that the intrinsic
dynamics of the translocase ATPase, SecA, and of preproteins
combine to achieve translocation. SecA possesses an
intrinsically dynamic preprotein clamp attached to an
equally dynamic ATPase motor. Alternating motor
conformations are finely controlled by the γ-phosphate of
ATP, while ADP causes motor stalling, independently of clamp
motions. Functional preproteins physically bridge these
independent dynamics. Their signal peptides promote clamp
closing; their mature domain overcomes the rate-limiting ADP
release. While repeated ATP cycles shift the motor between
unique states, multiple conformationally frustrated prongs
in the clamp repeatedly “catch and release” trapped
preprotein segments until translocation completion. This
universal mechanism allows any preprotein to promiscuously
recognize the translocase, usurp its intrinsic dynamics, and
become secreted.},
cin = {IAS-5 / INM-9},
ddc = {610},
cid = {I:(DE-Juel1)IAS-5-20120330 / I:(DE-Juel1)INM-9-20140121},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {35139375},
UT = {WOS:000754407500004},
doi = {10.1016/j.celrep.2022.110346},
url = {https://juser.fz-juelich.de/record/943337},
}