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Related Concept Videos

Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

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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 Equilibrium Binding Constant and Binding Strength02:18

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
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Conserved Binding Sites01:49

Conserved Binding Sites

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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.
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DNA Helicases

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DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
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Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
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Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

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DBSI: DNA-binding site identifier.

Xiaolei Zhu1, Spencer S Ericksen, Julie C Mitchell

  • 1BACTER Institute, University of Wisconsin-Madison, Madison, WI, USA, Departments of Mathematics and Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.

Nucleic Acids Research
|July 23, 2013
PubMed
Summary
This summary is machine-generated.

We developed the DNA-Binding Site Identifier (DBSI), a novel computational method to predict where proteins bind to DNA. DBSI accurately identifies DNA-binding sites, even with changing protein structures.

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Area of Science:

  • Structural biology
  • Computational biology
  • Bioinformatics

Background:

  • Predicting protein-DNA interactions is crucial for understanding gene regulation and developing therapeutics.
  • Existing methods often struggle with accuracy and robustness across different protein conformations.

Purpose of the Study:

  • To introduce the DNA-Binding Site Identifier (DBSI), a new structure-based computational method.
  • To enhance the prediction of protein residues involved in DNA binding.

Main Methods:

  • DBSI was trained and validated on extensive datasets of protein-DNA complexes.
  • A comprehensive set of 480 features, including novel electrostatic features, were computed.
  • Iterative feature selection identified key predictive attributes, such as electrostatic features matching DNA groove dimensions.

Main Results:

  • DBSI demonstrated superior predictive performance compared to established methods across various metrics.
  • The method showed robust accuracy on both unbound and bound protein structures, indicating resilience to conformational changes.
  • A unique banded electrostatic feature, relevant to DNA minor groove interactions, was identified.

Conclusions:

  • DBSI offers a significant advancement in predicting protein-DNA interaction sites.
  • The method's robustness across different protein conformations makes it a valuable tool.
  • The feature data table is provided for further research and model development.