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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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Related Experiment Video

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Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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SSDraw: Software for generating comparative protein secondary structure diagrams.

Ethan A Chen1, Lauren L Porter1,2

  • 1National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland, USA.

Protein Science : a Publication of the Protein Society
|November 13, 2023
PubMed
Summary
This summary is machine-generated.

SSDraw generates protein secondary structure diagrams for publication. This tool aids in comparing homologous protein structures and features through visualization and alignment.

Keywords:
metamorphic proteinsprotein evolutionprotein fold switchingprotein foldingprotein structurestructural bioinformatics

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Area of Science:

  • Structural biology
  • Bioinformatics
  • Computational biology

Background:

  • Protein structure visualization is crucial for understanding function.
  • Comparing homologous proteins requires tools that can align and display structural features.
  • Existing tools may lack comprehensive features for detailed secondary structure analysis.

Purpose of the Study:

  • To introduce SSDraw, a novel program for generating publication-quality protein secondary structure diagrams.
  • To enable visualization of relationships between secondary structure and other protein features.
  • To facilitate comparison of secondary structures among homologous proteins.

Main Methods:

  • SSDraw generates diagrams from 3D protein structures.
  • Diagrams can be colored by conservation score, B-factor, or custom scores.
  • Homologous protein diagrams can be registered using multiple sequence alignment for linear visualization and comparison.

Main Results:

  • SSDraw produces high-quality, customizable protein secondary structure diagrams.
  • The program allows for the registration and linear stacking of diagrams from homologous proteins.
  • It effectively visualizes conserved and divergent folds and associated properties.

Conclusions:

  • SSDraw is a versatile tool for visualizing and comparing protein secondary structures.
  • It supports detailed analysis by integrating various scoring methods and sequence alignments.
  • The availability of source code and a Colab notebook enhances accessibility for researchers.