期刊
BIOCHEMISTRY
卷 53, 期 18, 页码 2993-3003出版社
AMER CHEMICAL SOC
DOI: 10.1021/bi401575g
关键词
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资金
- Deutsche Forschungsgemeinschaft
- MONALISA project
- NANO4HEALTH project
- INSIDER project
The sigma(1) receptor is an integral membrane protein that shares no homology with other receptor systems, has no unequivocally identified natural ligands, but appears to play critical roles in a wide variety of cell functions. While the number of reports of the possible functions of the sigma(1) receptor is increasing, almost no information about the three-dimensional structure of the receptor and/or possible modes of interaction of the sigma(1) protein with its ligands have been described. Here we performed an in vitro/in silico investigation to analyze the molecular interactions of the sigma(1) receptor with its prototypical agonist (+)-pentazocine. Accordingly, 23 mutant a, isoforms were generated, and their interactions with (+)-pentazocine were determined experimentally. All direct and/or indirect effects exerted by the mutant residues on the receptor-agonist interactions were reproduced and rationalized in silk, thus shining new light on the three-dimensional structure of the sigma(1) receptor and its ligand binding site.
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