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@ARTICLE{Ruskamo:398517,
author = {Ruskamo, Salla and Nieminen, Tuomo and Kristiansen, Cecilie
K. and Vatne, Guro H. and Baumann, Anne and Hallin, Erik I.
and Raasakka, Arne and Joensuu, Päivi and Bergmann, Ulrich
and Vattulainen, Ilpo and Kursula, Petri},
title = {{M}olecular mechanisms of {C}harcot-{M}arie-{T}ooth
neuropathy linked to mutations in human myelin protein {P}2},
journal = {Scientific reports},
volume = {7},
number = {1},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {PUBDB-2017-14087},
pages = {6510},
year = {2017},
abstract = {Charcot-Marie-Tooth (CMT) disease is one of the most common
inherited neuropathies. Recently, three CMT1-associated
point mutations (I43N, T51P, and I52T) were discovered in
the abundant peripheral myelin protein P2. These mutations
trigger abnormal myelin structure, leading to reduced nerve
conduction velocity, muscle weakness, and distal limb
atrophy. P2 is a myelin-specific protein expressed by
Schwann cells that binds to fatty acids and membranes,
contributing to peripheral myelin lipid homeostasis. We
studied the molecular basis of the P2 patient mutations.
None of the CMT1-associated mutations alter the overall
folding of P2 in the crystal state. P2 disease variants show
increased aggregation tendency and remarkably reduced
stability, T51P being most severe. In addition, P2 disease
mutations affect protein dynamics. Both fatty acid binding
by P2 and the kinetics of its membrane interactions are
affected by the mutations. Experiments and simulations
suggest opening of the β barrel in T51P, possibly
representing a general mechanism in fatty acid-binding
proteins. Our findings demonstrate that altered biophysical
properties and functional dynamics of P2 may cause myelin
defects in CMT1 patients. At the molecular level, a few
malformed hydrogen bonds lead to structural instability and
misregulation of conformational changes related to ligand
exchange and membrane binding.},
cin = {EMBL-User},
ddc = {000},
cid = {I:(DE-H253)EMBL-User-20120814},
pnm = {6G3 - PETRA III (POF3-622)},
pid = {G:(DE-HGF)POF3-6G3},
experiment = {EXP:(DE-H253)P-P12-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28747762},
UT = {WOS:000406364600023},
doi = {10.1038/s41598-017-06781-0},
url = {https://bib-pubdb1.desy.de/record/398517},
}