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@ARTICLE{Casillo:891765,
author = {Casillo, Angela and Fabozzi, Antonio and Russo Krauss,
Irene and Parrilli, Ermenegilda and Biggs, Caroline I. and
Gibson, Matthew I. and Lanzetta, Rosa and Appavou,
Marie-Sousai and Radulescu, Aurel and Tutino, Maria L. and
Paduano, Luigi and Corsaro, Maria M.},
title = {{P}hysicochemical {A}pproach to {U}nderstanding the
{S}tructure, {C}onformation, and {A}ctivity of {M}annan
{P}olysaccharides},
journal = {Biomacromolecules},
volume = {22},
issn = {1526-4602},
address = {Columbus, Ohio},
publisher = {American Chemical Soc.},
reportid = {FZJ-2021-01723},
pages = {1445-1457},
year = {2021},
abstract = {Extracellular polysaccharides are widely produced by
bacteria, yeasts, and algae. These polymers are involved in
several biological functions, such as bacteria adhesion to
surface and biofilm formation, ion sequestering, protection
from desiccation, and cryoprotection. The chemical
characterization of these polymers is the starting point for
obtaining relationships between their structures and their
various functions. While this fundamental correlation is
well reported and studied for the proteins, for the
polysaccharides, this relationship is less intuitive. In
this paper, we elucidate the chemical structure and
conformational studies of a mannan exopolysaccharide from
the permafrost isolated bacterium Psychrobacter arcticus
strain 273-4. The mannan from the cold-adapted bacterium was
compared with its dephosphorylated derivative and the
commercial product from Saccharomyces cerevisiae. Starting
from the chemical structure, we explored a new approach to
deepen the study of the structure/activity relationship. A
pool of physicochemical techniques, ranging from small-angle
neutron scattering (SANS) and dynamic and static light
scattering (DLS and SLS, respectively) to circular dichroism
(CD) and cryo-transmission electron microscopy (cryo-TEM),
have been used. Finally, the ice recrystallization
inhibition activity of the polysaccharides was explored. The
experimental evidence suggests that the mannan
exopolysaccharide from P. arcticus bacterium has an
efficient interaction with the water molecules, and it is
structurally characterized by rigid-rod regions assuming a
14-helix-type conformation.},
cin = {JCNS-FRM-II / MLZ / JCNS-1 / JCNS-4},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-4-20201012},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4) / 632 - Materials – Quantum, Complex and
Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)TEM-MLZ-20151210},
typ = {PUB:(DE-HGF)16},
pubmed = {33729771},
UT = {WOS:000640310700010},
doi = {10.1021/acs.biomac.0c01659},
url = {https://juser.fz-juelich.de/record/891765},
}