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Related Concept Videos

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 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...
Conserved Binding Sites01:49

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Nucleic Acid Structure01:25

Nucleic Acid Structure

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 has a double-helix structure. The...
Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...

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Related Experiment Videos

Predicting loop-helix tertiary structural contacts in RNA pseudoknots.

Song Cao1, David P Giedroc, Shi-Jie Chen

  • 1Department of Physics, University of Missouri, Columbia, Missouri 65211, USA.

RNA (New York, N.Y.)
|January 27, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a new statistical model to predict RNA pseudoknot structures by analyzing loop-stem interactions. The model accurately forecasts RNA folding thermodynamics and tertiary contact parameters.

Related Experiment Videos

Area of Science:

  • Computational Biology
  • Biophysics
  • Molecular Biology

Background:

  • RNA pseudoknots are crucial for biological functions due to tertiary interactions.
  • Predicting these complex RNA tertiary interactions quantitatively remains a significant challenge.

Purpose of the Study:

  • To develop a statistical mechanical model for predicting noncanonical loop-stem base-pairing interactions in RNA pseudoknots.
  • To enable accurate predictions of RNA structure, stability, and folding pathways based on nucleotide sequence.

Main Methods:

  • Developed the Vfold model, an RNA virtual bond-based conformational model, to compute conformational entropy for pseudoknotted folds with tertiary contacts.
  • Integrated entropy parameters from the Vfold model with inserted energy parameters for tertiary contacts.
  • Performed theory-experimental comparisons to extract thermodynamic parameters for tertiary contacts.

Main Results:

  • The model accurately predicts RNA folding thermodynamics.
  • Thermodynamic parameters were determined for protonated (ΔH = -14 kcal/mol, ΔS = -38 cal/mol/K) and unprotonated (ΔH = -7 kcal/mol, ΔS = -19 cal/mol/K) C+(G-C) base triples.
  • The model demonstrated good agreement between theoretical predictions and experimental data for various pseudoknots.

Conclusions:

  • The Vfold model provides a robust framework for predicting RNA pseudoknot structure, stability, and folding pathways.
  • The model's ability to predict thermodynamic parameters from sequence alone advances the field of RNA structure prediction.