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Patch-Based Ray Tracing in NanoShaper Boosts Molecular Surface Computation.

Marco Domenico Mazzeo1, Vincenzo Di Florio1,2, Walter Rocchia1

  • 1Concept Lab, Fondazione Istituto Italiano di Tecnologia, via Morego 30, 16163 Genoa, Italy.

Journal of Chemical Information and Modeling
|December 23, 2025
PubMed
Summary
This summary is machine-generated.

NanoShaper (NS) software was redesigned using a patch-based ray tracing algorithm. This optimization significantly improves molecular surface triangulation speed and reduces memory usage for large molecular complexes.

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Area of Science:

  • Computational chemistry
  • Structural biology
  • Bioinformatics

Background:

  • NanoShaper (NS) is a key tool for molecular surface triangulation and analysis.
  • Existing methods face limitations with large molecular complexes due to computational demands.

Purpose of the Study:

  • To enhance the performance and reduce the memory footprint of NanoShaper.
  • To enable efficient triangulation of large molecular complexes on modest hardware.

Main Methods:

  • Implemented a novel patch-based ray tracing algorithm, replacing traditional ray-sweeping.
  • Optimized solvent-excluded surface (SES) construction through parallelization.
  • Introduced bilevel grids and compressed buffers, alongside an analytical ray-torus intersection scheme.

Main Results:

  • Achieved performance gains up to 12.5× and memory reductions up to 8×.
  • Enabled triangulation of complexes with millions of atoms rapidly.
  • Validated speed and accuracy on over 1500 structures, including the H1N1 virus.

Conclusions:

  • The redesigned NanoShaper (v1.5) offers substantial computational improvements.
  • The patch-based approach enhances efficiency for large-scale molecular modeling.
  • A new C++ API facilitates integration with other computational tools.