Journal: Mol Cell / Year: 2020 Title: Interconversion between Anticipatory and Active GID E3 Ubiquitin Ligase Conformations via Metabolically Driven Substrate Receptor Assembly. Authors: Shuai Qiao / Christine R Langlois / Jakub Chrustowicz / Dawafuti Sherpa / Ozge Karayel / Fynn M Hansen / Viola Beier / Susanne von Gronau / Daniel Bollschweiler / Tillman Schäfer / Arno F ...Authors: Shuai Qiao / Christine R Langlois / Jakub Chrustowicz / Dawafuti Sherpa / Ozge Karayel / Fynn M Hansen / Viola Beier / Susanne von Gronau / Daniel Bollschweiler / Tillman Schäfer / Arno F Alpi / Matthias Mann / J Rajan Prabu / Brenda A Schulman / Abstract: Cells respond to environmental changes by toggling metabolic pathways, preparing for homeostasis, and anticipating future stresses. For example, in Saccharomyces cerevisiae, carbon stress-induced ...Cells respond to environmental changes by toggling metabolic pathways, preparing for homeostasis, and anticipating future stresses. For example, in Saccharomyces cerevisiae, carbon stress-induced gluconeogenesis is terminated upon glucose availability, a process that involves the multiprotein E3 ligase GID recruiting N termini and catalyzing ubiquitylation of gluconeogenic enzymes. Here, genetics, biochemistry, and cryoelectron microscopy define molecular underpinnings of glucose-induced degradation. Unexpectedly, carbon stress induces an inactive anticipatory complex (GID), which awaits a glucose-induced substrate receptor to form the active GID. Meanwhile, other environmental perturbations elicit production of an alternative substrate receptor assembling into a related E3 ligase complex. The intricate structure of GID enables anticipating and ultimately binding various N-degron-targeting (i.e., "N-end rule") substrate receptors, while the GID E3 forms a clamp-like structure juxtaposing substrate lysines with the ubiquitylation active site. The data reveal evolutionarily conserved GID complexes as a family of multisubunit E3 ubiquitin ligases responsive to extracellular stimuli.
History
Deposition
Sep 24, 2019
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Header (metadata) release
Nov 13, 2019
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Map release
Nov 20, 2019
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Update
Dec 4, 2019
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Current status
Dec 4, 2019
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV / Details: 10s and 10 f blot after 30s incubation time.
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Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average exposure time: 7.0 sec. / Average electron dose: 55.16 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron optics
Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
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Image processing
CTF correction
Software - Name: Gctf (ver. 1.06)
Startup model
Type of model: OTHER Details: 3D initial model generated de novo from the 2D particles in relion suite
Final reconstruction
Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 87062
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