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ATLAS: Graph-based 3D RNA Motif Library Incorporating non-Watson-Crick Interactions.

Jingyi Li1,2, Jian Wang3, Srinivasan Ekambaram3

  • 1Department of Neuroscience & Experimental Therapeutics, Penn State College of Medicine, Hershey, Pennsylvania, USA.

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|February 27, 2026
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Summary
This summary is machine-generated.

The Advanced Template Library for Assembly and Structure (ATLAS) organizes RNA 3D structures and motifs, including non-Watson-Crick interactions. This resource aids RNA structure prediction and design by providing graph representations and a similarity measure.

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Area of Science:

  • Structural Biology
  • Bioinformatics
  • Computational Biology

Background:

  • RNA motifs are recurring structural patterns essential for RNA function.
  • Existing RNA 3D structure libraries lack comprehensive representations of non-Watson-Crick interactions and pseudoknots.

Purpose of the Study:

  • To develop the Advanced Template Library for Assembly and Structure (ATLAS) for RNA motif analysis.
  • To provide a resource for RNA 3D structure prediction and design, incorporating non-Watson-Crick interactions.
  • To establish a measure of RNA structural similarity based on shared motifs.

Main Methods:

  • Developed graph representations for RNA structures, including non-Watson-Crick interactions and pseudoknots.
  • Integrated atomic 3D structures from the Protein Data Bank (PDB) into ATLAS.
  • Implemented an isomorphism graph searching algorithm for motif identification.
  • Created a web service for searching and downloading RNA motifs and user-defined structures.
  • Proposed a physics-inspired model for RNA evolution to analyze structural similarity.

Main Results:

  • ATLAS provides nucleotide-level graph representations of RNA motifs and corresponding PDB IDs.
  • The library includes 3D atomic structures and supports non-Watson-Crick interactions and pseudoknots.
  • A novel measure of RNA similarity based on shared motifs was developed.
  • The proposed evolutionary model's steady-state solution aligns with observed RNA structural similarity distributions.

Conclusions:

  • ATLAS is a comprehensive resource for RNA motif analysis, prediction, and design.
  • The inclusion of non-Watson-Crick interactions and pseudoknots enhances RNA structure representation.
  • The developed similarity measure and evolutionary model offer new insights into RNA structural diversity and evolution.