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Optimization of parallel implementation of UNRES package for coarse‐grained simulations to treat large proteins

Abstract

We report major algorithmic improvements of the UNRES package for physics-based coarse-grained simulations of proteins. These include (i) introduction of interaction lists to optimize computations, (ii) transforming the inertia matrix to a pentadiagonal form to reduce computing and memory requirements, (iii) removing explicit angles and dihedral angles from energy expressions and recoding the most time-consuming energy/force terms to minimize the number of operations and to improve numerical stability, (iv) using OpenMP to parallelize those sections of the code for which distributed-memory parallelization involves unfavorable computing/communication time ratio, and (v) careful memory management to minimize simultaneous access of distant memory sections. The new code enables us to run molecular dynamics simulations of protein systems with size exceeding 100,000 amino-acid residues, reaching over 1 ns/day (1 μs/day in all-atom timescale) with 24 cores for proteins of this size. Parallel performance of the code and comparison of its performance with that of AMBER, GROMACS and MARTINI 3 is presented.

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DOI:
Digital Object Identifier (open in new tab) 10.1002/jcc.27026
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Copyright (2022 Wiley Periodicals LLC.)

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF COMPUTATIONAL CHEMISTRY no. 44, pages 602 - 625,
ISSN: 0192-8651
Language:
English
Publication year:
2023
Bibliographic description:
Sieradzan A., Sans‐duñó J., Lubecka E., Czaplewski C., Lipska A., Leszczyński H., Ocetkiewicz K., Proficz J., Czarnul P., Krawczyk H., Liwo A.: Optimization of parallel implementation of UNRES package for coarse‐grained simulations to treat large proteins// JOURNAL OF COMPUTATIONAL CHEMISTRY -Vol. 44,iss. 4 (2023), s.602-625
DOI:
Digital Object Identifier (open in new tab) 10.1002/jcc.27026
Sources of funding:
  • COST_FREE
Verified by:
Gdańsk University of Technology

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