Titin Circular RNAs Create a Back-Splice Motif Essential for SRSF10 Splicing
Author(s) -
Anke J. Tijsen,
Lucia Ortega,
Yolan J. Reckman,
Xiaolei Zhang,
Ingeborg van der Made,
Simona Aufiero,
Jiuru Li,
Selina C. Kamps,
Anouk van den Bout,
Harsha D. Devalla,
Karin Y. van SpaendonckZwarts,
Stefan Engelhardt,
Lior Gepstein,
James S. Ware,
Yigal M. Pinto
Publication year - 2021
Publication title -
circulation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.795
H-Index - 607
eISSN - 1524-4539
pISSN - 0009-7322
DOI - 10.1161/circulationaha.120.050455
Subject(s) - titin , rna splicing , induced pluripotent stem cell , alternative splicing , genetics , microbiology and biotechnology , biology , sarcomere , gene , rna , myocyte , exon , embryonic stem cell
TTN (Titin), the largest protein in humans, forms the molecular spring that spans half of the sarcomere to provide passive elasticity to the cardiomyocyte. Mutations that disrupt the TTN transcript are the most frequent cause of hereditary heart failure. We showed before that TTN produces a class of circular RNAs (circRNAs) that depend on RBM20 to be formed. In this study, we show that the back-splice junction formed by this class of circRNAs creates a unique motif that binds SRSF10 to enable it to regulate splicing. Furthermore, we show that one of these circRNAs (cTTN1) distorts both localization of and splicing by RBM20.
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