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@ARTICLE{Caruso:842938,
author = {Caruso, Icaro P. and Panwalkar, Vineet and Coronado, Monika
A. and Dingley, Andrew and Cornelio, Marinonio L. and
Willbold, Dieter and Arni, Raghuvir K. and Eberle, Raphael
J.},
title = {{S}tructure and interaction of {C}orynebacterium
pseudotuberculosis cold shock protein {A} with {Y}-box
single-stranded {DNA} fragment.},
journal = {EJB},
volume = {285},
number = {2},
issn = {0014-2956},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2018-01101},
pages = {372-390},
year = {2018},
abstract = {Cold shock proteins (Csps) function to preserve cell
viability at low tem-peratures by binding to nucleic acids
and consequently control gene expres-sion. The mesophilic
bacterium Corynebacterium pseudotuberculosis is thecausative
agent of caseous lymphadenitis in animals, and infection in
live-stock is a considerable economic burden worldwide. In
this report, thestructure of cold shock protein A from Cp (
Cp-CspA) and biochemicalanalysis of its
temperature-dependent interaction with a Y-box ssDNAmotif is
presented. The Cp-CspA structure contains five b-strands
makingup a b-barrel fold with 11 hydrophobic core residues
and two salt bridgesthat confers it with a melting
temperature of ~ 54 °C that is similar tomesophilic
Bs-CspB. Chemical shift perturbations analysis revealed
thatresidues in the nucleic acid-binding motifs (RNP 1 and
2) and loop 3 areinvolved in binding to the Y-box fragment
either by direct interaction orby conformational
rearrangements remote from the binding region. Fluo-rescence
quenching experiments of Cp-CspA showed that the
dissociationconstants for Y-box ssDNA binding is nanomolar
and the binding affinitydecreased as the temperature
increased, indicating that the interaction isenthalpically
driven and the hydrogen bonds and van der Waals forces
areimportant contributions for complex stabilization. The
Y31 of Cp-CspA isa particular occurrence among Csps from
mesophilic bacteria that providea possible explanation for
the higher binding affinity to ssDNA than thatobserved for
Bs-CspB. Anisotropy measurements indicated that the
reduc-tion in molecular mobility of Cp-CspA upon Y-box
binding is character-ized by a cooperative process.},
cin = {ICS-6},
ddc = {540},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29197185},
UT = {WOS:000423416700012},
doi = {10.1111/febs.14350},
url = {https://juser.fz-juelich.de/record/842938},
}