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Proteins often assemble into functional complexes, the structures of which are more difficult to obtain than those of the individual protein molecules. Given the structures of the subunits, it is possible to predict plausible complex models via computational methods such as molecular docking. Assessing the quality of the predicted models is crucial to obtain correct complex structures. Here, an energy-scoring function was developed based on the interfacial residues of structures in the Protein Data Bank. The statistically derived energy function (Nepre) imitates the neighborhood preferences of amino acids, including the types and relative positions of neighboring residues. Based on the preference statistics, a program iNepre was implemented and its performance was evaluated with several benchmarking decoy data sets. The results show that iNepre scores are powerful in model ranking to select the best protein complex structures.

Supporting information

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Portable Document Format (PDF) file https://doi.org/10.1107/S2059798322011858/lp5061sup1.pdf
Supplementary Tables and Figures.

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Link https://github.com/nagarajumulpuri/Nepre-F-I
Source code for the iNepre scoring function and tutorial on use of the program to predict protein complexes.


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