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Related Concept Videos

RNA Structure01:23

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. 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): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
RNA Structure01:23

RNA Structure

Overview
The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. 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): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
RNA Structure01:19

RNA Structure

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...
RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
RNA Stability01:53

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
Restarting Stalled Replication Forks02:37

Restarting Stalled Replication Forks

DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart, a...

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Related Experiment Video

Updated: Jun 3, 2026

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae
09:12

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae

Published on: February 27, 2026

Memory efficient algorithms for structural alignment of RNAs with pseudoknots.

Thomas K F Wong1, Y S Chiu, T W Lam

  • 1The University of Hong Kong, Hong Kong.

IEEE/ACM Transactions on Computational Biology and Bioinformatics
|April 6, 2011
PubMed
Summary
This summary is machine-generated.

This study presents memory-efficient algorithms for RNA structural alignment, significantly reducing computational space requirements for noncoding RNA (ncRNA) comparisons. These new methods make aligning long ncRNAs feasible.

Related Experiment Videos

Last Updated: Jun 3, 2026

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae
09:12

Comparative RNA Structure Analysis of Nascent and Mature Transcripts in Saccharomyces cerevisiae

Published on: February 27, 2026

Area of Science:

  • Bioinformatics
  • Computational Biology
  • Molecular Biology

Background:

  • RNA structural alignment is crucial for understanding RNA function.
  • Existing algorithms for RNA sequences with pseudoknots are computationally expensive.
  • Current methods are infeasible for comparing long noncoding RNAs (ncRNAs).

Purpose of the Study:

  • To develop memory-efficient algorithms for RNA structural alignment.
  • To address the limitations of existing algorithms for pseudoknotted RNA structures.
  • To enable feasible comparison of long ncRNAs.

Main Methods:

  • Developed novel algorithms for RNA structural alignment with simple and embedded pseudoknots.
  • Reduced space complexity from O(mn3) to O(n3) for simple pseudoknots.
  • Reduced space complexity to O(mn2 + n3) for embedded simple pseudoknots, maintaining time complexity.

Main Results:

  • Achieved significant memory reduction for RNA structural alignment.
  • Algorithms demonstrated feasibility for comparing ncRNAs exceeding 500 in length.
  • Modified algorithm handles recursive simple pseudoknots efficiently.

Conclusions:

  • The proposed memory-efficient algorithms overcome limitations of previous methods.
  • These advancements facilitate large-scale comparative analysis of ncRNAs.
  • The new algorithms are practical for real-world bioinformatics applications.