Analysis of Telomerase RNA Structure in Physcomitrium patens Indicates Functionally Relevant Transitions Between OPEN and CLOSED Conformations

0582767 - BFÚ 2025 RIV NL eng J - Journal Article
Bozdechova, L. - Havlová, K. - Fajkus, Petr - Fajkus, Jiří
Analysis of Telomerase RNA Structure in Physcomitrium patens Indicates Functionally Relevant Transitions Between OPEN and CLOSED Conformations.
Journal of Molecular Biology. Roč. 436, č. 4 (2024), č. článku 168417. ISSN 0022-2836. E-ISSN 1089-8638
R&D Projects: GA ČR(CZ) GX20-01331X; GA MŠMT(CZ) EH22_008/0004581
Institutional support: RVO:68081707
Keywords : shape * architecture * template * models * yeast * core * map * telomerase RNA
OECD category: Biochemistry and molecular biology
Impact factor: 5.6, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S002228362300534X?via%3Dihub

Telomerase RNA (TR) conformation determines its function as a template for telomere synthesis and as a scaffold for the assembly of the telomerase nucleoprotein complex. Experimental analyses of TR secondary structure using DMS-Map Seq and SHAPE-Map Seq techniques show its CLOSED conformation as the consensus structure where the template region cannot perform its function. Our data show that the apparent discrepancy between experimental results and predicted TR functional conformation, mostly ignored in published studies, can be explained using data analysis based on single-molecule structure prediction from individual sequencing reads by the recently established DaVinci method. This method results in several clusters of secondary structures reflecting the structural dynamics of TR, possibly related to its multiple functional states. Interestingly, the presumed active (OPEN) conformation of TR corresponds to a minor fraction of TR under in vivo conditions. Therefore, structural polymorphism and dynamic TR transitions between CLOSED and OPEN conformations may be involved in telomerase activity regulation as a switch that functions independently of total TR transcript levels. (c) 2023 Elsevier Ltd. All rights reserved.
Permanent Link: https://hdl.handle.net/11104/0352992