PMID- 28691794 OWN - NLM STAT- MEDLINE DCOM- 20180612 LR - 20201209 IS - 1948-7193 (Electronic) IS - 1948-7193 (Linking) VI - 8 IP - 9 DP - 2017 Sep 20 TI - Ligand Dependent Switch from RXR Homo- to RXR-NURR1 Heterodimerization. PG - 2065-2077 LID - 10.1021/acschemneuro.7b00216 [doi] AB - Retinoid X receptors (RXRs) play key roles in many physiological processes in both the periphery and central nervous system. In addition, RXRs form heterodimers with other nuclear receptors to exert their physiological effects. The nuclear receptor related 1 protein (NURR1) is particularly interesting because of its role in promoting differentiation and survival of dopamine neurons. However, only a small number of RXR-heterodimer selective modulators are available, with limited chemical diversity. This work describes the synthesis, biochemical evaluation, and structural elucidation of a novel series of RXR ligands with strongly biased interactions with RXRalpha-NURR1 heterodimers. Targeted modifications to the small molecule biaryl scaffold caused local RXRalpha side-chain disturbances and displacement of secondary structural elements upon ligand binding. This resulted in the repositioning of protein helices in the heterodimer interface of RXRalpha, alterations in homo- versus heterodimer formation, and modulation of activation function 2 (AF2). The data provide a rationale for the design of RXR ligands consisting of a highly conserved hydrophilic region, strongly contributing to the ligand affinity, and a variable hydrophobic region, which efficiently probes the effects of structural changes at the level of the ligand on co-regulator recruitment or the RXRalpha-NURR1 dimerization interface. FAU - Scheepstra, Marcel AU - Scheepstra M AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - Andrei, Sebastian A AU - Andrei SA AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - de Vries, Rens M J M AU - de Vries RMJM AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - Meijer, Femke A AU - Meijer FA AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - Ma, Jian-Nong AU - Ma JN AD - ACADIA Pharmaceuticals Inc., San Diego, California 92130, United States. FAU - Burstein, Ethan S AU - Burstein ES AD - ACADIA Pharmaceuticals Inc., San Diego, California 92130, United States. FAU - Olsson, Roger AU - Olsson R AD - Chemical Biology & Therapeutics, Department of Experimental Medical Science, Lund University , SE-221 00 Lund, Sweden. FAU - Ottmann, Christian AU - Ottmann C AUID- ORCID: 0000-0001-7315-0315 AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - Milroy, Lech-Gustav AU - Milroy LG AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. FAU - Brunsveld, Luc AU - Brunsveld L AUID- ORCID: 0000-0001-5675-511X AD - Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Technische Universiteit Eindhoven , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands. LA - eng PT - Journal Article DEP - 20170724 PL - United States TA - ACS Chem Neurosci JT - ACS chemical neuroscience JID - 101525337 RN - 0 (Esters) RN - 0 (Ethers) RN - 0 (Ligands) RN - 0 (Nuclear Receptor Subfamily 4, Group A, Member 2) RN - 0 (Retinoid X Receptor alpha) SB - IM MH - Drug Design MH - Escherichia coli MH - Esters/chemistry MH - Ethers/chemistry MH - Humans MH - Hydrogen Bonding MH - Ligands MH - Models, Molecular MH - Molecular Structure MH - Nuclear Receptor Subfamily 4, Group A, Member 2/agonists/antagonists & inhibitors/*chemistry/*metabolism MH - Protein Binding MH - Protein Multimerization MH - Retinoid X Receptor alpha/agonists/antagonists & inhibitors/*chemistry/*metabolism MH - Two-Hybrid System Techniques PMC - PMC5609127 OTO - NOTNLM OT - Nuclear receptors OT - heterodimerization OT - ligand binding domain OT - nuclear receptor related 1 OT - retinoid X receptor COIS- The authors declare no competing financial interest. EDAT- 2017/07/12 06:00 MHDA- 2018/06/13 06:00 PMCR- 2017/09/22 CRDT- 2017/07/11 06:00 PHST- 2017/07/12 06:00 [pubmed] PHST- 2018/06/13 06:00 [medline] PHST- 2017/07/11 06:00 [entrez] PHST- 2017/09/22 00:00 [pmc-release] AID - 10.1021/acschemneuro.7b00216 [doi] PST - ppublish SO - ACS Chem Neurosci. 2017 Sep 20;8(9):2065-2077. doi: 10.1021/acschemneuro.7b00216. Epub 2017 Jul 24.