{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,6]],"date-time":"2026-01-06T05:27:15Z","timestamp":1767677235585,"version":"build-2065373602"},"reference-count":85,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Consejo Nacional de Ciencia y Tecnolog\u00eda","award":["335496","A1-S-17090"],"award-info":[{"award-number":["335496","A1-S-17090"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Life"],"abstract":"<jats:p>The CXCR6\u2012CXCL16 axis is involved in several pathological processes, and its overexpression has been detected in different types of cancer, such as prostate, breast, ovary, and lung cancer, along with schwannomas, in which it promotes invasion and metastasis. Moreover, this axis is involved in atherosclerosis, type 1 diabetes, primary immune thrombocytopenia, vitiligo, and other autoimmune diseases, in which it is responsible for the infiltration of different immune system cells. The 3D structure of CXCR6 and CXCL16 has not been experimentally resolved; therefore, homology modeling and molecular dynamics simulations could be useful for the study of this signaling axis. In this work, a homology model of CXCR6 and a soluble form of CXCL16 (CXCR6\u2012CXCL16s) are reported to study the interactions between CXCR6 and CXCL16s through coarse-grained molecular dynamics (CG-MD) simulations. CG-MD simulations showed the two activation steps of CXCR6 through a decrease in the distance between the chemokine and the transmembrane region (TM) of CXCR6 and transmembrane rotational changes and polar interactions between transmembrane segments. The polar interactions between TM3, TM5, and TM6 are fundamental to functional conformation and the meta-active state of CXCR6. The interactions between D77-R280 and T243-TM7 could be related to the functional conformation of CXCR6; alternatively, the interaction between Q195-Q244 and N248 could be related to an inactive state due to the loss of this interaction, and an arginine cage broken in the presence of CXCL16s allows the meta-active state of CXCR6. A general protein\u2012ligand interaction supports the relevance of TM3\u2012TM5\u2012TM6 interactions, presenting three relevant pharmacophoric features: HAc (H-bond acceptor), HDn (H-bond donator), and Hph (hydrophobic), distributed around the space between extracellular loops (ECLs) and TMs. The HDn feature is close to TM3 and TM6; likewise, the HAc and Hph features are close to ECL1 and ECL2 and could block the rotation and interactions between TM3\u2012TM6 and the interactions of CXCL16s with the ECLs. Tridimensional quantitative structure-activity relationships (3D-QSAR) models show that the positive steric (VdW) and electrostatic fields coincide with the steric and positive electrostatic region of the exo-azabicyclo[3.3.1]nonane scaffold in the best pIC50 ligands. This substructure is close to the E274 residue and therefore relevant to the activity of CXCR6. These data could help with the design of new molecules that inhibit chemokine binding or antagonize the receptor based on the activation mechanism of CXCR6 and provoke a decrease in chemotaxis caused by the CXCR6\u2012CXCL16 axis.<\/jats:p>","DOI":"10.3390\/life11040346","type":"journal-article","created":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T12:11:00Z","timestamp":1618488660000},"page":"346","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Behavior of Chemokine Receptor 6 (CXCR6) in Complex with CXCL16 Soluble form Chemokine by Molecular Dynamic Simulations: General Protein\u2012Ligand Interaction Model and 3D-QSAR Studies of Synthetic Antagonists"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3376-2477","authenticated-orcid":false,"given":"Giovanny","family":"Aguilera-Dur\u00e1n","sequence":"first","affiliation":[{"name":"Posgrado en Ciencias Qu\u00edmico Biol\u00f3gicas, Facultad de Qu\u00edmica, Universidad Aut\u00f3noma de Quer\u00e9taro, Cerro de las Campanas S\/N, Quer\u00e9taro 76010, Mexico"},{"name":"Laboratorio de Dise\u00f1o Asistido por Computadora y S\u00edntesis de F\u00e1rmacos, Facultad de Qu\u00edmica, Universidad Aut\u00f3noma de Quer\u00e9taro, Centro Universitario, Quer\u00e9taro 76010, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2869-588X","authenticated-orcid":false,"given":"Antonio","family":"Romo-Mancillas","sequence":"additional","affiliation":[{"name":"Laboratorio de Dise\u00f1o Asistido por Computadora y S\u00edntesis de F\u00e1rmacos, Facultad de Qu\u00edmica, Universidad Aut\u00f3noma de Quer\u00e9taro, Centro Universitario, Quer\u00e9taro 76010, Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"610","DOI":"10.1056\/NEJMra052723","article-title":"The many roles of chemokines and chemokine receptors in inflammation","volume":"354","author":"Charo","year":"2006","journal-title":"N. 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