National Institutes of Health/National Human Genome Research Institute
EY012287
米国
Spanish Ministry of Science, Innovation, and Universities
BFU2016-75984
スペイン
引用
ジャーナル: Nat Commun / 年: 2019 タイトル: Structural and functional analysis of the role of the chaperonin CCT in mTOR complex assembly. 著者: Jorge Cuéllar / W Grant Ludlam / Nicole C Tensmeyer / Takuma Aoba / Madhura Dhavale / César Santiago / M Teresa Bueno-Carrasco / Michael J Mann / Rebecca L Plimpton / Aman Makaju / Sarah ...著者: Jorge Cuéllar / W Grant Ludlam / Nicole C Tensmeyer / Takuma Aoba / Madhura Dhavale / César Santiago / M Teresa Bueno-Carrasco / Michael J Mann / Rebecca L Plimpton / Aman Makaju / Sarah Franklin / Barry M Willardson / José M Valpuesta / 要旨: The mechanistic target of rapamycin (mTOR) kinase forms two multi-protein signaling complexes, mTORC1 and mTORC2, which are master regulators of cell growth, metabolism, survival and autophagy. Two ...The mechanistic target of rapamycin (mTOR) kinase forms two multi-protein signaling complexes, mTORC1 and mTORC2, which are master regulators of cell growth, metabolism, survival and autophagy. Two of the subunits of these complexes are mLST8 and Raptor, β-propeller proteins that stabilize the mTOR kinase and recruit substrates, respectively. Here we report that the eukaryotic chaperonin CCT plays a key role in mTORC assembly and signaling by folding both mLST8 and Raptor. A high resolution (4.0 Å) cryo-EM structure of the human mLST8-CCT intermediate isolated directly from cells shows mLST8 in a near-native state bound to CCT deep within the folding chamber between the two CCT rings, and interacting mainly with the disordered N- and C-termini of specific CCT subunits of both rings. These findings describe a unique function of CCT in mTORC assembly and a distinct binding site in CCT for mLST8, far from those found for similar β-propeller proteins.
名称: Human substrate-free CCT / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#8 詳細: we have characterized the eukaryotic chaperonin CCT (1 MDa; formed by two copies of eight homologous subunits)