Biotechnology and Biological Sciences Research Council (BBSRC)
BB/T01508X/1
European Union
European Research Council (ERC)
647278
European Union
引用
ジャーナル: Mol Cell / 年: 2021 タイトル: Structure, mechanism, and inhibition of Hedgehog acyltransferase. 著者: Claire E Coupland / Sebastian A Andrei / T Bertie Ansell / Loic Carrique / Pramod Kumar / Lea Sefer / Rebekka A Schwab / Eamon F X Byrne / Els Pardon / Jan Steyaert / Anthony I Magee / Thomas ...著者: Claire E Coupland / Sebastian A Andrei / T Bertie Ansell / Loic Carrique / Pramod Kumar / Lea Sefer / Rebekka A Schwab / Eamon F X Byrne / Els Pardon / Jan Steyaert / Anthony I Magee / Thomas Lanyon-Hogg / Mark S P Sansom / Edward W Tate / Christian Siebold / 要旨: The Sonic Hedgehog (SHH) morphogen pathway is fundamental for embryonic development and stem cell maintenance and is implicated in various cancers. A key step in signaling is transfer of a palmitate ...The Sonic Hedgehog (SHH) morphogen pathway is fundamental for embryonic development and stem cell maintenance and is implicated in various cancers. A key step in signaling is transfer of a palmitate group to the SHH N terminus, catalyzed by the multi-pass transmembrane enzyme Hedgehog acyltransferase (HHAT). We present the high-resolution cryo-EM structure of HHAT bound to substrate analog palmityl-coenzyme A and a SHH-mimetic megabody, revealing a heme group bound to HHAT that is essential for HHAT function. A structure of HHAT bound to potent small-molecule inhibitor IMP-1575 revealed conformational changes in the active site that occlude substrate binding. Our multidisciplinary analysis provides a detailed view of the mechanism by which HHAT adapts the membrane environment to transfer an acyl chain across the endoplasmic reticulum membrane. This structure of a membrane-bound O-acyltransferase (MBOAT) superfamily member provides a blueprint for other protein-substrate MBOATs and a template for future drug discovery.