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-Structure paper
| タイトル | Neurotransmitter-bound bestrophin channel structures reveal small molecule drug targeting sites for disease treatment. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 10766, Year 2024 |
| 掲載日 | 2024年12月30日 |
著者 | Aaron P Owji / Jingyun Dong / Alec Kittredge / Jiali Wang / Yu Zhang / Tingting Yang / ![]() |
| PubMed 要旨 | Best1 and Best2 are two members of the bestrophin family of anion channels critically involved in the prevention of retinal degeneration and maintenance of intraocular pressure, respectively. Here, ...Best1 and Best2 are two members of the bestrophin family of anion channels critically involved in the prevention of retinal degeneration and maintenance of intraocular pressure, respectively. Here, we solved glutamate- and γ-aminobutyric acid (GABA)-bound Best2 structures, which delineate an intracellular glutamate binding site and an extracellular GABA binding site on Best2, respectively, identified extracellular GABA as a permeable activator of Best2, and elucidated the co-regulation of Best2 by glutamate, GABA and glutamine synthetase in vivo. We further identified multiple small molecules as activators of the bestrophin channels. Extensive analyses were carried out for a potent activator, 4-aminobenzoic acid (PABA): PABA-bound Best1 and Best2 structures are solved and illustrate the same binding site as in GABA-bound Best2; PABA treatment rescues the functional deficiency of patient-derived Best1 mutations. Together, our results demonstrate the mechanism and potential of multiple small molecule candidates as clinically applicable drugs for bestrophin-associated diseases/conditions. |
リンク | Nat Commun / PubMed:39737942 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.27 - 3.15 Å |
| 構造データ | EMDB-47304, PDB-9dyh: EMDB-47305, PDB-9dyi: EMDB-47306, PDB-9dyj: EMDB-47307, PDB-9dyk: EMDB-47308, PDB-9dyl: EMDB-47309, PDB-9dym: EMDB-47310, PDB-9dyn: EMDB-47311, PDB-9dyo: |
| 化合物 | ![]() ChemComp-CA: ![]() ChemComp-GLU: ![]() ChemComp-CL: ![]() ChemComp-ABU: ![]() ChemComp-PAB: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / calcium-activated chloride channel / Glutamate-bound anion channel / channel-activator complex / GABA-bound anion channel / para-aminobenzoic acid (PABA)-bound anion channel |
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