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Related Concept Videos

RNA Structure01:19

RNA Structure

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The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
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Transfer RNA Synthesis02:36

Transfer RNA Synthesis

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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
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Nucleic Acid Structure01:25

Nucleic Acid Structure

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA...
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Translational Regulation01:29

Translational Regulation

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Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
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Ribosome Profiling02:24

Ribosome Profiling

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
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Leaky Scanning02:28

Leaky Scanning

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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Updated: Sep 18, 2025

RNA Secondary Structure Prediction Using High-throughput SHAPE
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TARNAS: A Software Tool for Abstracting and Translating RNA Secondary Structures.

Michela Quadrini1, Piero Hierro Canchari1, Piermichele Rosati1

  • 1School of Sciences and Technology, University of Camerino, Via Madonna delle Carceri 7, 62032 Camerino, Italy.

International Journal of Molecular Sciences
|June 26, 2025
PubMed
Summary
This summary is machine-generated.

TARNAS 1.0 is a new software tool that converts RNA secondary structures between multiple formats. It aids in large dataset construction and database curation by facilitating RNA comparison and pattern identification.

Keywords:
RNA secondary structure formatsRNAMLabstractions of RNA secondary structuresstatistics on RNA secondary structures

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Molecular Biology

Background:

  • Ribonucleic acids (RNAs) fold into complex structures crucial for their biological functions.
  • RNA secondary structures are key for comparison and classification, existing in various formats.
  • Standardized tools are needed for efficient handling and analysis of diverse RNA structures.

Purpose of the Study:

  • Introduce TARNAS 1.0, a versatile software tool for RNA secondary structure format conversion.
  • Provide capabilities for preprocessing and analyzing RNA secondary structures.
  • Facilitate large-scale RNA data management and comparative studies.

Main Methods:

  • Developed TARNAS 1.0 software supporting multiple RNA secondary structure formats (BPSEQ, CT, dot-bracket, AAS, FASTA, RNAML).
  • Implemented options for comment, blank line, and header handling during format conversion.
  • Integrated features for computing three levels of RNA secondary structure abstraction (core, core plus, shape) and statistical descriptors.

Main Results:

  • TARNAS 1.0 enables seamless conversion between various RNA secondary structure formats.
  • The tool supports batch processing for large RNA datasets and single-molecule analysis via web interface.
  • TARNAS 1.0 computes structural abstractions and statistical descriptors for enhanced RNA comparison.

Conclusions:

  • TARNAS 1.0 is a valuable tool for RNA secondary structure data management and analysis.
  • Its format conversion and abstraction capabilities support large dataset construction and database curation.
  • The software aids in identifying structural patterns for associating RNA structure with function.