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Updated: Jul 11, 2025

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Highly Efficient Ligation of Small RNA Molecules for MicroRNA Quantitation by High-Throughput Sequencing
Published on: November 18, 2014
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Insights into the structure and function of the RNA ligase RtcB.
Matthieu Moncan1,2, Hassan Rakhsh-Khorshid1,2, Leif A Eriksson3
1Apoptosis Research Centre, University of Galway, Galway, Ireland.
Cellular and Molecular Life Sciences : CMLS
|November 7, 2023
Summary
RtcB is the sole 3'-5' RNA ligase in humans, crucial for RNA splicing and maturation. This review explores RtcB structure, function, and regulation across species, highlighting its role in human cancer.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- RNA splicing and ligation are essential for cellular function.
- RtcB is the only identified 3"-5" RNA ligase in human cells.
- RtcB is vital for XBP1 splicing and tRNA maturation, impacting protein synthesis and homeostasis.
Purpose of the Study:
- To review the structure and mechanism of RtcB-mediated 3 -5 RNA ligation.
- To describe RtcB regulation, partners, and functions across diverse organisms.
- To focus on the role of RtcB in human cancer.
Main Methods:
- Comparative analysis of RtcB orthologues in archaea, bacteria, and eukaryotes.
- Review of existing literature on RtcB structure, mechanism, and function.
- Exploration of RtcB's role in cellular processes and disease.
Main Results:
- RtcB exhibits high homology across species, suggesting conserved functions.
- RtcB's essential role in splicing and tRNA maturation is confirmed.
- RtcB's involvement in human cancer is an area of active investigation.
Conclusions:
- RtcB is a fundamental enzyme in RNA processing with conserved functions.
- Understanding RtcB's regulation and interactions is key to its biological roles.
- RtcB represents a potential target for therapeutic intervention in human diseases, including cancer.
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