Synthesis of One Double Bond-Inserted Retinal Analogs and Their Binding Experiments with Opsins: Preparation of Novel Red-Shifted Channelrhodopsin Variants
作者:Takashi Okitsu、Yumiko Yamano、Yi-Chung Shen、Toshikazu Sasaki、Yuka Kobayashi、Shoko Morisawa、Takahiro Yamashita、Yasushi Imamoto、Yoshinori Shichida、Akimori Wada
DOI:10.1248/cpb.c19-01005
日期:2020.3.1
new chromophores with one double bond inserted into the polyene side chain of retinal (A1) or 3,4-didehydroretinal (A2), and examined their binding efficiency with opsins (ReaChR and ChrimsonR). All analogs bound with opsins to afford new ChRs. Among them, A2-10ex (an extra double bond is inserted at the C10-C11 position of A2) showed the greatest red-shift in the absorption spectrum of ChrimsonR, with
在光遗传学中,人们急切地寻找红移的通道视紫红质(ChRs)。我们制备了六种新的生色团,它们的一个双键插入到视网膜(A1)或3,4-二氢脱氢视网膜(A2)的多烯侧链中,并检查了它们与视蛋白的结合效率(ReaChR和ChrimsonR)。所有类似物都与视蛋白结合,以提供新的ChR。其中,A2-10ex(在A2的C10-C11位置插入了一个额外的双键)在ChrimsonR的吸收光谱中显示出最大的红移,在654 nm处具有最大的吸光度(从该处吸收了67 nm的红移)。 A1-ChrimsonR)。此外,A2-10ex-ChrimsonR的长波光谱边界扩展到756 nm,并到达了远红色区域(710-850 nm)。