+Open data
-Basic information
Entry | Database: PDB / ID: 8q0n | |||||||||
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Title | HACE1 in complex with RAC1 Q61L | |||||||||
Components |
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Keywords | LIGASE / E3 / ubiquitin ligase / small GTPase / crosslink / SIA | |||||||||
Function / homology | Function and homology information regulation of respiratory burst / negative regulation of interleukin-23 production / regulation of neutrophil migration / localization within membrane / Activated NTRK2 signals through CDK5 / NADPH oxidase complex / negative regulation of receptor-mediated endocytosis / regulation of hydrogen peroxide metabolic process / ruffle assembly / NTRK2 activates RAC1 ...regulation of respiratory burst / negative regulation of interleukin-23 production / regulation of neutrophil migration / localization within membrane / Activated NTRK2 signals through CDK5 / NADPH oxidase complex / negative regulation of receptor-mediated endocytosis / regulation of hydrogen peroxide metabolic process / ruffle assembly / NTRK2 activates RAC1 / engulfment of apoptotic cell / Inactivation of CDC42 and RAC1 / WNT5:FZD7-mediated leishmania damping / SEMA3A-Plexin repulsion signaling by inhibiting Integrin adhesion / cortical cytoskeleton organization / respiratory burst / hepatocyte growth factor receptor signaling pathway / HECT-type E3 ubiquitin transferase / ruffle organization / cell projection assembly / thioesterase binding / negative regulation of fibroblast migration / regulation of stress fiber assembly / RHO GTPases activate CIT / Nef and signal transduction / sphingosine-1-phosphate receptor signaling pathway / PCP/CE pathway / motor neuron axon guidance / RHO GTPases activate KTN1 / regulation of nitric oxide biosynthetic process / regulation of lamellipodium assembly / positive regulation of neutrophil chemotaxis / Azathioprine ADME / Activation of RAC1 / DCC mediated attractive signaling / positive regulation of cell-substrate adhesion / MET activates RAP1 and RAC1 / Wnt signaling pathway, planar cell polarity pathway / Sema4D mediated inhibition of cell attachment and migration / CD28 dependent Vav1 pathway / Ephrin signaling / lamellipodium assembly / positive regulation of Rho protein signal transduction / Golgi cisterna membrane / establishment or maintenance of cell polarity / regulation of cell size / DSCAM interactions / Activation of RAC1 downstream of NMDARs / small GTPase-mediated signal transduction / Rho GDP-dissociation inhibitor binding / NRAGE signals death through JNK / Rac protein signal transduction / Golgi organization / RHO GTPases activate PAKs / positive regulation of focal adhesion assembly / semaphorin-plexin signaling pathway / ficolin-1-rich granule membrane / Sema3A PAK dependent Axon repulsion / EPH-ephrin mediated repulsion of cells / RHO GTPases Activate NADPH Oxidases / RHO GTPases Activate WASPs and WAVEs / anatomical structure morphogenesis / protein K48-linked ubiquitination / RHO GTPases activate IQGAPs / localization / PTK6 Regulates RHO GTPases, RAS GTPase and MAP kinases / positive regulation of lamellipodium assembly / positive regulation of substrate adhesion-dependent cell spreading / regulation of cell migration / positive regulation of microtubule polymerization / RHO GTPases activate PKNs / positive regulation of stress fiber assembly / GPVI-mediated activation cascade / RAC1 GTPase cycle / EPHB-mediated forward signaling / actin filament polymerization / cell chemotaxis / substrate adhesion-dependent cell spreading / cell-matrix adhesion / small monomeric GTPase / G protein activity / positive regulation of endothelial cell migration / secretory granule membrane / VEGFR2 mediated vascular permeability / Signal transduction by L1 / actin filament organization / cell motility / RHO GTPases Activate Formins / Translocation of SLC2A4 (GLUT4) to the plasma membrane / regulation of actin cytoskeleton organization / FCGR3A-mediated phagocytosis / FCERI mediated MAPK activation / neuron migration / MAPK6/MAPK4 signaling / trans-Golgi network / Signaling by SCF-KIT / cytoplasmic ribonucleoprotein granule / Regulation of actin dynamics for phagocytic cup formation / ruffle membrane / small GTPase binding Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | |||||||||
Authors | Wolter, M. / Duering, J. / Dienemann, C. / Lorenz, S. | |||||||||
Funding support | European Union, Germany, 2items
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Citation | Journal: Nat Struct Mol Biol / Year: 2024 Title: Structural mechanisms of autoinhibition and substrate recognition by the ubiquitin ligase HACE1. Authors: Jonas Düring / Madita Wolter / Julia J Toplak / Camilo Torres / Olexandr Dybkov / Thornton J Fokkens / Katherine E Bohnsack / Henning Urlaub / Wieland Steinchen / Christian Dienemann / Sonja Lorenz / Abstract: Ubiquitin ligases (E3s) are pivotal specificity determinants in the ubiquitin system by selecting substrates and decorating them with distinct ubiquitin signals. However, structure determination of ...Ubiquitin ligases (E3s) are pivotal specificity determinants in the ubiquitin system by selecting substrates and decorating them with distinct ubiquitin signals. However, structure determination of the underlying, specific E3-substrate complexes has proven challenging owing to their transient nature. In particular, it is incompletely understood how members of the catalytic cysteine-driven class of HECT-type ligases (HECTs) position substrate proteins for modification. Here, we report a cryogenic electron microscopy (cryo-EM) structure of the full-length human HECT HACE1, along with solution-based conformational analyses by small-angle X-ray scattering and hydrogen-deuterium exchange mass spectrometry. Structure-based functional analyses in vitro and in cells reveal that the activity of HACE1 is stringently regulated by dimerization-induced autoinhibition. The inhibition occurs at the first step of the catalytic cycle and is thus substrate-independent. We use mechanism-based chemical crosslinking to reconstitute a complex of activated, monomeric HACE1 with its major substrate, RAC1, determine its structure by cryo-EM and validate the binding mode by solution-based analyses. Our findings explain how HACE1 achieves selectivity in ubiquitinating the active, GTP-loaded state of RAC1 and establish a framework for interpreting mutational alterations of the HACE1-RAC1 interplay in disease. More broadly, this work illuminates central unexplored aspects in the architecture, conformational dynamics, regulation and specificity of full-length HECTs. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8q0n.cif.gz | 343.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8q0n.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 8q0n.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/q0/8q0n ftp://data.pdbj.org/pub/pdb/validation_reports/q0/8q0n | HTTPS FTP |
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-Related structure data
Related structure data | 18056MC 8pwlC C: citing same article (ref.) M: map data used to model this data |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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-Components
#1: Protein | Mass: 99930.656 Da / Num. of mol.: 1 / Mutation: deletion 1-21 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: HACE1, KIAA1320 / Production host: Escherichia coli BL21 (bacteria) References: UniProt: Q8IYU2, HECT-type E3 ubiquitin transferase |
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#2: Protein | Mass: 23769.672 Da / Num. of mol.: 1 / Mutation: Q61L Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RAC1, TC25, MIG5 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: P63000, small monomeric GTPase |
#3: Chemical | ChemComp-04E / |
#4: Chemical | ChemComp-GTP / |
Has ligand of interest | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: HACE1 in complex with RAC1 Q61L / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT | ||||||||||||||||
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Molecular weight | Experimental value: NO | ||||||||||||||||
Source (natural) | Organism: Homo sapiens (human) | ||||||||||||||||
Source (recombinant) | Organism: Escherichia coli (E. coli) | ||||||||||||||||
Buffer solution | pH: 8 | ||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||
Specimen support | Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
-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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 105000 X / Nominal defocus max: 3500 nm / Nominal defocus min: 800 nm |
Image recording | Electron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 256595 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT | |||||||||||||||||||||||||||||||||
Atomic model building | Source name: AlphaFold / Type: in silico model | |||||||||||||||||||||||||||||||||
Refine LS restraints |
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