{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T20:16:52Z","timestamp":1781122612075,"version":"3.54.1"},"reference-count":60,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2020,7,10]],"date-time":"2020-07-10T00:00:00Z","timestamp":1594339200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004281","name":"Narodowe Centrum Nauki","doi-asserted-by":"publisher","award":["UMO-2015\/17\/B\/ST4\/03568"],"award-info":[{"award-number":["UMO-2015\/17\/B\/ST4\/03568"]}],"id":[{"id":"10.13039\/501100004281","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Histidine is unique among amino acids because of its rich tautomeric properties. It participates in essential enzymatic centers, such as catalytic triads. The main aim of the study is the modeling of the change of molecular properties between the gas phase and solution using microsolvation models. We investigate histidine in its three protonation states, microsolvated with 1:6 water molecules. These clusters are studied computationally, in the gas phase and with water as a solvent (Polarizable Continuum Model, PCM) within the Density Functional Theory (DFT) framework. The structural analysis reveals the presence of intra- and intermolecular hydrogen bonds. The Atoms-in-Molecules (AIM) theory is employed to determine the impact of solvation on the charge flow within the histidine, with emphasis on the similarity of the two imidazole nitrogen atoms\u2014topologically not equivalent, they are revealed as electronically similar due to the heterocyclic ring aromaticity. Finally, the Symmetry-Adapted Perturbation Theory (SAPT) is used to examine the stability of the microsolvation clusters. While electrostatic and exchange terms dominate in magnitude over polarization and dispersion, the sum of electrostatic and exchange term is close to zero. This makes polarization the factor governing the actual interaction energy. The most important finding of this study is that even with microsolvation, the polarization induced by the presence of implicit solvent is still significant. Therefore, we recommend combined approaches, mixing explicit water molecules with implicit models.<\/jats:p>","DOI":"10.3390\/sym12071153","type":"journal-article","created":{"date-parts":[[2020,7,10]],"date-time":"2020-07-10T09:45:31Z","timestamp":1594374331000},"page":"1153","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Microsolvation of Histidine\u2014A Theoretical Study of Intermolecular Interactions Based on AIM and SAPT Approaches"],"prefix":"10.3390","volume":"12","author":[{"given":"Beata","family":"Kizior","sequence":"first","affiliation":[{"name":"Faculty of Chemistry, University of Wroc\u0142aw, ul. F. Joliot-Curie 14, 50-383 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2952-9739","authenticated-orcid":false,"given":"Jaros\u0142aw J.","family":"Panek","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, University of Wroc\u0142aw, ul. F. Joliot-Curie 14, 50-383 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6601-9124","authenticated-orcid":false,"given":"Aneta","family":"Jezierska","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, University of Wroc\u0142aw, ul. F. Joliot-Curie 14, 50-383 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,7,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1375","DOI":"10.1021\/cr960091b","article-title":"Crystal Engineering and Organometallic Architecture","volume":"98","author":"Braga","year":"1998","journal-title":"Chem. Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"5216","DOI":"10.1021\/acs.chemrev.5b00583","article-title":"Experimental Binding Energies in Supramolecular Complexes","volume":"116","author":"Biedermann","year":"2016","journal-title":"Chem. Rev."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Du, X., Li, Y., Xia, Y.-L., Ai, S.-M., Liang, J., Sang, P., Ji, X.-L., and Liu, S.-Q. (2016). Insights into Protein\u2013Ligand Interactions: Mechanisms, Models, and Methods. Int. J. Mol. 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