SWORD2: hierarchical analysis of protein 3D structures

Area of Science:

• * Structural biology
• * Bioinformatics
• * Computational biology

Background:

• * Understanding protein function and evolution necessitates analyzing fragments of these macromolecules.
• * While structural domains are common, shorter segments like subdomains offer valuable insights.
• * Identifying these substructures aids in understanding protein behavior and evolutionary history.

Purpose of the Study:

• * To introduce SWORD2, a web server for decomposing protein structures into hierarchical 'Protein Units'.
• * To enable the identification of substructures that can be assembled to delimit structural domains.
• * To provide tools for biologists and bioinformaticians to analyze key protein regions.

Main Methods:

• * Integration of domain delineation algorithms.
• * Application of 'protein peeling' techniques for hierarchical decomposition.
• * Utilization of model quality assessment measures to evaluate substructure relevance.

Main Results:

• * SWORD2 offers a novel method for partitioning protein structures into hierarchical 'Protein Units'.
• * The server estimates the relevance of identified substructures using multiple measures.
• * Provides a multilevel analysis for exploring protein architecture.

Conclusions:

• * SWORD2 facilitates the exploration of protein substructures for functional and evolutionary insights.
• * The web server is a valuable resource for researchers studying protein domains and their components.
• * SWORD2 supports biologists and bioinformaticians in analyzing protein structures and building datasets.