ジャーナル: Science / 年: 2022 タイトル: Molecular structures reveal synergistic rescue of Δ508 CFTR by Trikafta modulators. 著者: Karol Fiedorczuk / Jue Chen / 要旨: The predominant mutation causing cystic fibrosis, a deletion of phenylalanine 508 (Δ508) in the cystic fibrosis transmembrane conductance regulator (CFTR), leads to severe defects in CFTR biogenesis ...The predominant mutation causing cystic fibrosis, a deletion of phenylalanine 508 (Δ508) in the cystic fibrosis transmembrane conductance regulator (CFTR), leads to severe defects in CFTR biogenesis and function. The advanced therapy Trikafta combines the folding corrector tezacaftor (VX-661), the channel potentiator ivacaftor (VX-770), and the dual-function modulator elexacaftor (VX-445). However, it is unclear how elexacaftor exerts its effects, in part because the structure of Δ508 CFTR is unknown. Here, we present cryo-electron microscopy structures of Δ508 CFTR in the absence and presence of CFTR modulators. When used alone, elexacaftor partially rectified interdomain assembly defects in Δ508 CFTR, but when combined with a type I corrector, did so fully. These data illustrate how the different modulators in Trikafta synergistically rescue Δ508 CFTR structure and function.
Cysticfibrosistransmembraneconductanceregulator / CFTR / ATP-binding cassette sub-family C member 7 / Channel conductance-controlling ATPase / cAMP- ...CFTR / ATP-binding cassette sub-family C member 7 / Channel conductance-controlling ATPase / cAMP-dependent chloride channel
分子量: 168187.297 Da / 分子数: 1 / 変異: E1371Q / 由来タイプ: 組換発現 詳細: Construct used for expression is the human CFTR with a deletion of F508 and E1371Q substitution. 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CFTR, ABCC7 / 発現宿主: Homo sapiens (ヒト) 参照: UniProt: P13569, channel-conductance-controlling ATPase