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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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The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
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Analyzing and Building Nucleic Acid Structures with 3DNA
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Published on: April 26, 2013

SwS: a solvation web service for nucleic acids.

Pascal Auffinger1, Yaser Hashem

  • 1A.R.N., Université Louis Pasteur, IBMC-CNRS, Strasbourg, France. p.auffinger@ibmc.u-strasbg.fr

Bioinformatics (Oxford, England)
|February 28, 2007
PubMed
Summary

The Solvation of Nucleic Acids web service (SwS) analyzes crystallographic data to map 3D solvent density around DNA and RNA. This resource aids molecular dynamics, crystallography, and drug design by detailing nucleic acid solvation patterns.

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Area of Science:

  • Structural biology
  • Biophysics
  • Computational chemistry

Background:

  • The Solvation of Nucleic Acids (SwS) web service analyzes crystallographic structures from the Nucleic Data Bank (NDB).
  • It focuses on the solvation of DNA, RNA, and hybrid base pairs, including interactions with water, cations, and anions.
  • The service provides weekly updated data on nucleic acid solvation.

Purpose of the Study:

  • To offer a comprehensive overview of nucleic acid solvation through 3D solvent density maps.
  • To support molecular dynamics simulations, crystallographic interpretation, drug design, and general nucleic acid structural studies.
  • To provide statistical insights into base pair occurrence and nucleotide conformations in crystallographic data.

Main Methods:

  • Statistical analysis of crystallographic structures.
  • Generation of 3D solvent density maps.
  • Web service implementation for flexible querying and didactic purposes.

Main Results:

  • Detailed 3D solvent density maps for nucleic acid structural elements.
  • Statistical data on base pair frequencies and nucleotide conformations.
  • Identification of interactions between base pairs and water, cations, and/or anions.

Conclusions:

  • SwS offers a valuable, up-to-date resource for researchers studying nucleic acid solvation.
  • The service facilitates validation of simulations, interpretation of structural data, and advances in drug design.
  • Its flexible design and didactic approach make it accessible for various applications in structural biology.