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- PDB-6bfc: Cryo-EM structure of human insulin degrading enzyme in complex wi... -
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Open data
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Basic information
Entry | Database: PDB / ID: 6bfc | |||||||||||||||
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Title | Cryo-EM structure of human insulin degrading enzyme in complex with insulin | |||||||||||||||
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![]() | HYDROLASE/HORMONE / IDE / amyloid beta / HORMONE / HYDROLASE-HORMONE complex | |||||||||||||||
Function / homology | ![]() insulysin / ubiquitin recycling / insulin catabolic process / insulin metabolic process / amyloid-beta clearance by cellular catabolic process / hormone catabolic process / bradykinin catabolic process / ubiquitin-modified protein reader activity / insulin binding / negative regulation of NAD(P)H oxidase activity ...insulysin / ubiquitin recycling / insulin catabolic process / insulin metabolic process / amyloid-beta clearance by cellular catabolic process / hormone catabolic process / bradykinin catabolic process / ubiquitin-modified protein reader activity / insulin binding / negative regulation of NAD(P)H oxidase activity / negative regulation of glycogen catabolic process / regulation of cellular amino acid metabolic process / regulation of aerobic respiration / positive regulation of nitric oxide mediated signal transduction / negative regulation of fatty acid metabolic process / negative regulation of feeding behavior / Signaling by Insulin receptor / peptide catabolic process / IRS activation / Insulin processing / regulation of protein secretion / amyloid-beta clearance / positive regulation of respiratory burst / positive regulation of peptide hormone secretion / Regulation of gene expression in beta cells / negative regulation of acute inflammatory response / peroxisomal matrix / alpha-beta T cell activation / negative regulation of respiratory burst involved in inflammatory response / positive regulation of dendritic spine maintenance / positive regulation of glycogen biosynthetic process / Synthesis, secretion, and deacylation of Ghrelin / negative regulation of protein secretion / regulation of protein localization to plasma membrane / fatty acid homeostasis / amyloid-beta metabolic process / Signal attenuation / negative regulation of lipid catabolic process / FOXO-mediated transcription of oxidative stress, metabolic and neuronal genes / negative regulation of gluconeogenesis / COPI-mediated anterograde transport / positive regulation of lipid biosynthetic process / negative regulation of oxidative stress-induced intrinsic apoptotic signaling pathway / negative regulation of reactive oxygen species biosynthetic process / positive regulation of insulin receptor signaling pathway / nitric oxide-cGMP-mediated signaling / transport vesicle / positive regulation of protein autophosphorylation / Insulin receptor recycling / neuron projection maintenance / NPAS4 regulates expression of target genes / positive regulation of protein metabolic process / positive regulation of brown fat cell differentiation / positive regulation of glycolytic process / activation of protein kinase B activity / endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of mitotic nuclear division / Insulin receptor signalling cascade / proteolysis involved in protein catabolic process / positive regulation of nitric-oxide synthase activity / positive regulation of cytokine production / positive regulation of long-term synaptic potentiation / acute-phase response / Regulation of insulin secretion / endosome lumen / positive regulation of protein secretion / positive regulation of glucose import / negative regulation of proteolysis / positive regulation of cell differentiation / Peroxisomal protein import / regulation of transmembrane transporter activity / peptide binding / insulin-like growth factor receptor binding / wound healing / protein catabolic process / insulin receptor binding / regulation of synaptic plasticity / negative regulation of protein catabolic process / hormone activity / antigen processing and presentation of endogenous peptide antigen via MHC class I / cognition / metalloendopeptidase activity / positive regulation of neuron projection development / positive regulation of protein localization to nucleus / Golgi lumen / positive regulation of protein catabolic process / vasodilation / peroxisome / glucose metabolic process / regulation of protein localization / positive regulation of protein binding / insulin receptor signaling pathway / cell-cell signaling / glucose homeostasis / virus receptor activity / positive regulation of NF-kappaB transcription factor activity / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / positive regulation of cell growth / basolateral plasma membrane / secretory granule lumen Similarity search - Function | |||||||||||||||
Biological species | ![]() | |||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||||||||
![]() | Liang, W.G. / Zhang, Z. / Bailey, L.J. / Kossiakoff, A.A. / Tan, Y.Z. / Wei, H. / Carragher, B. / Potter, S.C. / Tang, W.J. | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Ensemble cryoEM elucidates the mechanism of insulin capture and degradation by human insulin degrading enzyme. Authors: Zhening Zhang / Wenguang G Liang / Lucas J Bailey / Yong Zi Tan / Hui Wei / Andrew Wang / Mara Farcasanu / Virgil A Woods / Lauren A McCord / David Lee / Weifeng Shang / Rebecca Deprez- ...Authors: Zhening Zhang / Wenguang G Liang / Lucas J Bailey / Yong Zi Tan / Hui Wei / Andrew Wang / Mara Farcasanu / Virgil A Woods / Lauren A McCord / David Lee / Weifeng Shang / Rebecca Deprez-Poulain / Benoit Deprez / David R Liu / Akiko Koide / Shohei Koide / Anthony A Kossiakoff / Sheng Li / Bridget Carragher / Clinton S Potter / Wei-Jen Tang / ![]() ![]() Abstract: Insulin degrading enzyme (IDE) plays key roles in degrading peptides vital in type two diabetes, Alzheimer's, inflammation, and other human diseases. However, the process through which IDE recognizes ...Insulin degrading enzyme (IDE) plays key roles in degrading peptides vital in type two diabetes, Alzheimer's, inflammation, and other human diseases. However, the process through which IDE recognizes peptides that tend to form amyloid fibrils remained unsolved. We used cryoEM to understand both the apo- and insulin-bound dimeric IDE states, revealing that IDE displays a large opening between the homologous ~55 kDa N- and C-terminal halves to allow selective substrate capture based on size and charge complementarity. We also used cryoEM, X-ray crystallography, SAXS, and HDX-MS to elucidate the molecular basis of how amyloidogenic peptides stabilize the disordered IDE catalytic cleft, thereby inducing selective degradation by substrate-assisted catalysis. Furthermore, our insulin-bound IDE structures explain how IDE processively degrades insulin by stochastically cutting either chain without breaking disulfide bonds. Together, our studies provide a mechanism for how IDE selectively degrades amyloidogenic peptides and offers structural insights for developing IDE-based therapies. | |||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 352.3 KB | Display | ![]() |
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PDB format | ![]() | 287.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 948.2 KB | Display | ![]() |
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Full document | ![]() | 957.5 KB | Display | |
Data in XML | ![]() | 64.6 KB | Display | |
Data in CIF | ![]() | 96.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7041MC ![]() 7062C ![]() 7065C ![]() 7066C ![]() 7090C ![]() 7091C ![]() 7092C ![]() 7093C ![]() 5wobC ![]() 6b3qC ![]() 6b70C ![]() 6b7yC ![]() 6b7zC ![]() 6bf6C ![]() 6bf7C ![]() 6bf8C ![]() 6bf9C M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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1 | ![]()
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Components
#1: Protein | Mass: 111866.484 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 11989.862 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Insulin bound insulin degrading enzyme / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | ||||||||||||||||||||
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Molecular weight | Value: 0.1 MDa / Experimental value: YES | ||||||||||||||||||||
Source (natural) | Organism: ![]() | ||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | ||||||||||||||||||||
Buffer solution | pH: 7.8 | ||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Homemade | ||||||||||||||||||||
Vitrification | Instrument: HOMEMADE PLUNGER / Cryogen name: ETHANE / Humidity: 85 % / Chamber temperature: 293 K / Details: Grids made using Spotiton |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 22500 X / Calibrated magnification: 46598 X / Nominal defocus max: 2200 nm / Nominal defocus min: 940 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 70 K / Temperature (min): 70 K / Residual tilt: 10 mradians |
Image recording | Average exposure time: 10 sec. / Electron dose: 71.4 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 3 / Num. of real images: 3085 |
Image scans | Sampling size: 5 µm / Width: 3710 / Height: 3838 / Movie frames/image: 50 / Used frames/image: 1-50 |
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Processing
Software | Name: PHENIX / Version: 1.12_2829: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 762283 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 148392 / Algorithm: FOURIER SPACE / Num. of class averages: 2 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 111.9 / Protocol: FLEXIBLE FIT / Space: REAL | ||||||||||||||||||||||||||||||||||||||||
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