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基本情報
登録情報 | データベース: PDB / ID: 8qz7 | |||||||||
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タイトル | Structure of human ceramide synthase 6 (CerS6) in complex with N-palmitoyl fumonisin B1 | |||||||||
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![]() | MEMBRANE PROTEIN / CERAMIDE / SPHINGOLIPID / MYCOTOXIN / FUMONISIN B1 / INHIBITORY PRODUCT | |||||||||
機能・相同性 | ![]() sphingoid base N-palmitoyltransferase / sphingosine N-acyltransferase activity / sphingolipid biosynthetic process / Sphingolipid de novo biosynthesis / ceramide biosynthetic process / inflammatory response / endoplasmic reticulum membrane / DNA binding / membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3 Å | |||||||||
![]() | Pascoa, T.C. / Pike, A.C.W. / Chi, G. / Stefanic, S. / Quigley, A. / Chalk, R. / Mukhopadhyay, S.M.M. / Venkaya, S. / Dix, C. / Moreira, T. ...Pascoa, T.C. / Pike, A.C.W. / Chi, G. / Stefanic, S. / Quigley, A. / Chalk, R. / Mukhopadhyay, S.M.M. / Venkaya, S. / Dix, C. / Moreira, T. / Tessitore, A. / Cole, V. / Chu, A. / Elkins, J.M. / Pautsch, A. / Schnapp, G. / Carpenter, E.P. / Sauer, D.B. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis of the mechanism and inhibition of a human ceramide synthase. 著者: Tomas C Pascoa / Ashley C W Pike / Christofer S Tautermann / Gamma Chi / Michael Traub / Andrew Quigley / Rod Chalk / Saša Štefanić / Sven Thamm / Alexander Pautsch / Elisabeth P Carpenter ...著者: Tomas C Pascoa / Ashley C W Pike / Christofer S Tautermann / Gamma Chi / Michael Traub / Andrew Quigley / Rod Chalk / Saša Štefanić / Sven Thamm / Alexander Pautsch / Elisabeth P Carpenter / Gisela Schnapp / David B Sauer / ![]() ![]() ![]() 要旨: Ceramides are bioactive sphingolipids crucial for regulating cellular metabolism. Ceramides and dihydroceramides are synthesized by six ceramide synthase (CerS) enzymes, each with specificity for ...Ceramides are bioactive sphingolipids crucial for regulating cellular metabolism. Ceramides and dihydroceramides are synthesized by six ceramide synthase (CerS) enzymes, each with specificity for different acyl-CoA substrates. Ceramide with a 16-carbon acyl chain (C16 ceramide) has been implicated in obesity, insulin resistance and liver disease and the C16 ceramide-synthesizing CerS6 is regarded as an attractive drug target for obesity-associated disease. Despite their importance, the molecular mechanism underlying ceramide synthesis by CerS enzymes remains poorly understood. Here we report cryo-electron microscopy structures of human CerS6, capturing covalent intermediate and product-bound states. These structures, along with biochemical characterization, reveal that CerS catalysis proceeds through a ping-pong reaction mechanism involving a covalent acyl-enzyme intermediate. Notably, the product-bound structure was obtained upon reaction with the mycotoxin fumonisin B1, yielding insights into its inhibition of CerS. These results provide a framework for understanding CerS function, selectivity and inhibition and open routes for future drug discovery. | |||||||||
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関連構造データ | ![]() 18771MC ![]() 8qz6C ![]() 9eotC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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