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@ARTICLE{Busley:1037157,
author = {Busley, Alexandra Viktoria and Gutiérrez-Gutiérrez,
Óscar and Hammer, Elke and Koitka, Fabian and
Mirzaiebadizi, Amin and Steinegger, Martin and Pape,
Constantin and Böhmer, Linda and Schroeder, Henning and
Kleinsorge, Mandy and Engler, Melanie and Cirstea, Ion
Cristian and Gremer, Lothar and Willbold, Dieter and
Altmüller, Janine and Marbach, Felix and Hasenfuss, Gerd
and Zimmermann, Wolfram-Hubertus and Ahmadian, Mohammad Reza
and Wollnik, Bernd and Cyganek, Lukas},
title = {{M}utation-induced {LZTR}1 polymerization provokes cardiac
pathology in recessive {N}oonan syndrome},
journal = {Cell reports},
volume = {43},
number = {7},
issn = {2211-1247},
address = {Maryland Heights, MO},
publisher = {Cell Press},
reportid = {FZJ-2025-00502},
pages = {114448 -},
year = {2024},
abstract = {Noonan syndrome patients harboring causative variants in
LZTR1 are particularly at risk to develop severe and
early-onset hypertrophic cardiomyopathy. In this study, we
investigate the mechanistic consequences of a homozygous
variant LZTR1L580P by using patient-specific and
CRISPR-Cas9-corrected induced pluripotent stem cell (iPSC)
cardiomyocytes. Molecular, cellular, and functional
phenotyping in combination with in silico prediction
identify an LZTR1L580P-specific disease mechanism provoking
cardiac hypertrophy. The variant is predicted to alter the
binding affinity of the dimerization domains facilitating
the formation of linear LZTR1 polymers. LZTR1 complex
dysfunction results in the accumulation of RAS GTPases,
thereby provoking global pathological changes of the
proteomic landscape ultimately leading to cellular
hypertrophy. Furthermore, our data show that
cardiomyocyte-specific MRAS degradation is mediated by LZTR1
via non-proteasomal pathways, whereas RIT1 degradation is
mediated by both LZTR1-dependent and LZTR1-independent
pathways. Uni- or biallelic genetic correction of the
LZTR1L580P missense variant rescues the molecular and
cellular disease phenotype, providing proof of concept for
CRISPR-based therapies.},
cin = {IBI-7},
ddc = {610},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {39003740},
UT = {WOS:001270335000001},
doi = {10.1016/j.celrep.2024.114448},
url = {https://juser.fz-juelich.de/record/1037157},
}