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-Structure paper
タイトル | Structure of the human TSC:WIPI3 lysosomal recruitment complex. |
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ジャーナル・号・ページ | Sci Adv, Vol. 10, Issue 47, Page eadr5807, Year 2024 |
掲載日 | 2024年11月22日 |
![]() | Charles Bayly-Jones / Christopher J Lupton / Laura D'Andrea / Yong-Gang Chang / Gareth D Jones / Joel R Steele / Hari Venugopal / Ralf B Schittenhelm / Michelle L Halls / Andrew M Ellisdon / ![]() |
PubMed 要旨 | Tuberous sclerosis complex (TSC) is targeted to the lysosomal membrane, where it hydrolyzes RAS homolog-mTORC1 binding (RHEB) from its GTP-bound to GDP-bound state, inhibiting mechanistic target of ...Tuberous sclerosis complex (TSC) is targeted to the lysosomal membrane, where it hydrolyzes RAS homolog-mTORC1 binding (RHEB) from its GTP-bound to GDP-bound state, inhibiting mechanistic target of rapamycin complex 1 (mTORC1). Loss-of-function mutations in TSC cause TSC disease, marked by excessive tumor growth. Here, we overcome a high degree of continuous conformational heterogeneity to determine the 2.8-Å cryo-electron microscopy (cryo-EM) structure of the complete human TSC in complex with the lysosomal recruitment factor WD repeat domain phosphoinositide-interacting protein 3 (WIPI3). We discover a previously undetected amino-terminal TSC1 HEAT repeat dimer that clamps onto a single TSC wing and forms a phosphatidylinositol phosphate (PIP)-binding pocket, which specifically binds monophosphorylated PIPs. These structural advances provide a model by which WIPI3 and PIP-signaling networks coordinate to recruit TSC to the lysosomal membrane to inhibit mTORC1. The high-resolution TSC structure reveals previously unrecognized mutational hotspots and uncovers crucial insights into the mechanisms of TSC dysregulation in disease. |
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手法 | EM (単粒子) / X線回折 |
解像度 | 2.76 - 3.86 Å |
構造データ | EMDB-45492, PDB-9ce3: ![]() EMDB-45510: The WIPI3:TSC lysosomal docking complex (consensus reconstruction) ![]() EMDB-45511: The WIPI3:TSC lysosomal docking complex (focused reconstruction; core) ![]() EMDB-45512: The WIPI3:TSC lysosomal docking complex (focused reconstruction; TSC1 N-terminus) ![]() EMDB-45513: The WIPI3:TSC lysosomal docking complex (focused reconstruction; TBC1D7) ![]() EMDB-45514: The WIPI3:TSC lysosomal docking complex (focused reconstruction; TBC1D7/TSC2) ![]() EMDB-45515: The WIPI3:TSC lysosomal docking complex (focused reconstruction; WIPI3) ![]() EMDB-45529: The WIPI3:TSC lysosomal docking complex (focused reconstruction; WIPI3 TSC2) ![]() PDB-9c9i: |
由来 |
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![]() | GENE REGULATION / TSC / Tuberous sclerosis complex / TSC1 / TSC2 / TBC1D7 / WIPI3 / end-some / MTOR / cell growth / ONCOPROTEIN / tumour suppressor / GTPase-activating proteins (GAP) / TSC-mTORC pathway |