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However, experimental structures still remain unavailable for a majority of the GPCR family. GPCR structures and their interactions with ligands can also be modelled computationally, but such predictions have limited accuracy. In this work, we explored if molecular dynamics (MD) simulations could be used to refine the accuracy of<jats:italic>in silico<\/jats:italic>models of receptor-ligand complexes that were submitted to a community-wide assessment of GPCR structure prediction (GPCR Dock). Two simulation protocols were used to refine 30 models of the D<jats:sub>3<\/jats:sub>dopamine receptor (D<jats:sub>3<\/jats:sub>R) in complex with an antagonist. Close to 60 \u03bcs of simulation time was generated and the resulting MD refined models were compared to a D<jats:sub>3<\/jats:sub>R crystal structure. In the MD simulations, the receptor models generally drifted further away from the crystal structure conformation. However, MD refinement was able to improve the accuracy of the ligand binding mode. The best refinement protocol improved agreement with the experimentally observed ligand binding mode for a majority of the models. Receptor structures with improved virtual screening performance, which was assessed by molecular docking of ligands and decoys, could also be identified among the MD refined models. Application of weak restraints to the transmembrane helixes in the MD simulations further improved predictions of the ligand binding mode and second extracellular loop. These results provide guidelines for application of MD refinement in prediction of GPCR-ligand complexes and directions for further method development.<\/jats:p>","DOI":"10.1371\/journal.pcbi.1008936","type":"journal-article","created":{"date-parts":[[2021,5,13]],"date-time":"2021-05-13T18:10:56Z","timestamp":1620929456000},"page":"e1008936","update-policy":"https:\/\/doi.org\/10.1371\/journal.pcbi.corrections_policy","source":"Crossref","is-referenced-by-count":31,"title":["Can molecular dynamics simulations improve the structural accuracy and virtual screening performance of GPCR models?"],"prefix":"10.1371","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3328-1921","authenticated-orcid":true,"given":"Jon","family":"Kapla","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1602-8679","authenticated-orcid":true,"given":"Ismael","family":"Rodr\u00edguez-Espigares","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4831-3423","authenticated-orcid":true,"given":"Flavio","family":"Ballante","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1844-4449","authenticated-orcid":true,"given":"Jana","family":"Selent","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4623-2977","authenticated-orcid":true,"given":"Jens","family":"Carlsson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2021,5,13]]},"reference":[{"issue":"1","key":"pcbi.1008936.ref001","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1093\/nar\/28.1.235","article-title":"The Protein Data Bank","volume":"28","author":"HM Berman","year":"2000","journal-title":"Nucleic Acids Res"},{"issue":"D1","key":"pcbi.1008936.ref002","doi-asserted-by":"crossref","first-page":"D506","DOI":"10.1093\/nar\/gky1049","article-title":"UniProt: a worldwide hub of protein knowledge","volume":"47","author":"C. 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