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Types of RNA

Types of RNA

Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...

Types of RNA

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

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Related Experiment Video

Updated: Jul 6, 2026

Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism

Published on: July 28, 2017

Chemically modified oligonucleotides with efficient RNase H response.

Birte Vester¹, Anne Marie Boel, Sune Lobedanz

¹Nucleic Acid Center, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.

Bioorganic & Medicinal Chemistry Letters

|March 22, 2008

Summary

This summary is machine-generated.

Chemically modified nucleosides in DNA strands enhanced RNAse H cleavage of complementary RNA. Specific modifications improved cleavage efficiency, showing potential for therapeutic applications.

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Published on: September 21, 2017

Area of Science:

Biochemistry
Molecular Biology
Oligonucleotide Chemistry

Background:

RNAse H is an enzyme crucial for RNA processing and degradation.
Chemically modified oligonucleotides are investigated for therapeutic applications, including modulating enzyme activity.
Understanding how nucleoside modifications affect enzyme interactions is vital for designing effective nucleic acid-based therapies.

Purpose of the Study:

To evaluate the impact of ten distinct chemically modified nucleosides on RNAse H-mediated cleavage.
To determine if modifications at central positions of DNA oligonucleotides influence RNA cleavage efficiency.
To explore potential correlations between duplex thermal stability and RNAse H cleavage activity.

Main Methods:

Synthesis of chimeric oligonucleotides (ON3-ON12 and ON15-ON24) incorporating ten different chemically modified nucleosides.
Formation of DNA:RNA duplexes with modified oligonucleotides and a complementary RNA strand.
Assay of RNAse H cleavage activity on the RNA strand within these duplexes.
Measurement of thermal stability (melting temperature) of the DNA:RNA duplexes.

Main Results:

Oligonucleotides ON3, ON5, and ON12 demonstrated enhanced RNAse H cleavage of the complementary RNA strand compared to a DNA:RNA control duplex.
The modifications were strategically placed within the presumed RNAse H cleavage region of the DNA oligonucleotides.
No clear correlation was observed between the thermal stability of the DNA:RNA duplexes and the efficiency of RNAse H cleavage.

Conclusions:

Specific chemically modified nucleosides can enhance RNAse H-mediated RNA cleavage.
The position of modifications within the DNA oligonucleotide is critical for modulating RNAse H activity.
Enhanced cleavage efficiency by modified oligonucleotides may not be directly related to increased duplex thermal stability, suggesting alternative mechanisms of action.