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Related Concept Videos

Protein Organization01:24

Protein Organization

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Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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A Protocol for Computer-Based Protein Structure and Function Prediction
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Web-based GTalign: bridging speed and accuracy in protein structure analysis.

Justas Dapkūnas1, Mindaugas Margelevičius1

  • 1Institute of Biotechnology, Life Sciences Center, Vilnius University, Saulėtekio av. 7, 10257 Vilnius, Lithuania.

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Summary

GTalign-web offers accurate and fast protein structure alignment, aiding in understanding protein relationships and annotating unknown proteins. This web tool enhances structural biology research and functional genomics.

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Area of Science:

  • Structural biology
  • Bioinformatics
  • Computational biology

Background:

  • Accurate protein structure alignment is critical for deciphering protein structure-function relationships and evolutionary connections.
  • Existing tools may face limitations in speed or accuracy for large-scale structural analyses.
  • The need for accessible, high-performance tools for protein structure comparison is ongoing.

Purpose of the Study:

  • To introduce GTalign-web, a web-based platform for GTalign, a spatial index-driven protein structure alignment tool.
  • To provide a user-friendly and high-performance solution for structural searches and functional annotation of proteins.
  • To evaluate GTalign-web's performance against established structural alignment servers.

Main Methods:

  • Development of GTalign-web as a web implementation of the GTalign algorithm.
  • Utilizing a spatial index for efficient structural searching.
  • Benchmarking GTalign-web against DALI and Foldseek using established datasets and metrics.
  • Application of GTalign-web for annotating uncharacterized proteins against the UniRef30 database.

Main Results:

  • GTalign-web demonstrates superior accuracy compared to DALI and Foldseek servers.
  • The tool achieves rapid search times, indicating high performance.
  • Successful annotation of uncharacterized proteins using GTalign-web, highlighting its practical utility.
  • The web server provides a valuable resource for structural and functional protein analysis.

Conclusions:

  • GTalign-web is an accurate and efficient tool for protein structure alignment and functional annotation.
  • The web-based implementation enhances accessibility for researchers in structural biology and bioinformatics.
  • GTalign-web serves as a valuable resource for exploring protein structural similarities and inferring functions.