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- PDB-9hr6: cryoEM structure of amyloid fibrils formed by human RIPK1 -

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Basic information

Entry
Database: PDB / ID: 9hr6
TitlecryoEM structure of amyloid fibrils formed by human RIPK1
ComponentsReceptor-interacting serine/threonine-protein kinase 1
KeywordsPROTEIN FIBRIL / Amyloid / kinase
Function / homology
Function and homology information


ripoptosome assembly / positive regulation of miRNA processing / positive regulation of interleukin-6-mediated signaling pathway / ripoptosome assembly involved in necroptotic process / death domain binding / peptidyl-serine autophosphorylation / ripoptosome / Defective RIPK1-mediated regulated necrosis / Microbial modulation of RIPK1-mediated regulated necrosis / TRIF-mediated programmed cell death ...ripoptosome assembly / positive regulation of miRNA processing / positive regulation of interleukin-6-mediated signaling pathway / ripoptosome assembly involved in necroptotic process / death domain binding / peptidyl-serine autophosphorylation / ripoptosome / Defective RIPK1-mediated regulated necrosis / Microbial modulation of RIPK1-mediated regulated necrosis / TRIF-mediated programmed cell death / Regulation by c-FLIP / CASP8 activity is inhibited / Dimerization of procaspase-8 / TLR3-mediated TICAM1-dependent programmed cell death / TNF signaling / programmed necrotic cell death / Caspase activation via Death Receptors in the presence of ligand / SARS-CoV-1-mediated effects on programmed cell death / positive regulation of macrophage differentiation / T cell apoptotic process / JUN kinase kinase kinase activity / necroptotic signaling pathway / NF-kB activation through FADD/RIP-1 pathway mediated by caspase-8 and -10 / death-inducing signaling complex / positive regulation of necroptotic process / RIP-mediated NFkB activation via ZBP1 / negative regulation of necroptotic process / positive regulation of tumor necrosis factor-mediated signaling pathway / death receptor binding / positive regulation of programmed cell death / positive regulation of programmed necrotic cell death / positive regulation of extrinsic apoptotic signaling pathway / TNFR1-induced proapoptotic signaling / RIPK1-mediated regulated necrosis / TRP channels / necroptotic process / response to tumor necrosis factor / positive regulation of execution phase of apoptosis / canonical NF-kappaB signal transduction / negative regulation of extrinsic apoptotic signaling pathway in absence of ligand / extrinsic apoptotic signaling pathway / TICAM1, RIP1-mediated IKK complex recruitment / signaling adaptor activity / IKK complex recruitment mediated by RIP1 / TNFR1-induced NF-kappa-B signaling pathway / negative regulation of canonical NF-kappaB signal transduction / Regulation of TNFR1 signaling / tumor necrosis factor-mediated signaling pathway / negative regulation of extrinsic apoptotic signaling pathway / positive regulation of interleukin-8 production / positive regulation of JNK cascade / Regulation of necroptotic cell death / protein catabolic process / positive regulation of non-canonical NF-kappaB signal transduction / positive regulation of NF-kappaB transcription factor activity / cellular response to growth factor stimulus / cellular response to hydrogen peroxide / Ovarian tumor domain proteases / positive regulation of protein phosphorylation / positive regulation of reactive oxygen species metabolic process / positive regulation of inflammatory response / positive regulation of tumor necrosis factor production / cellular response to tumor necrosis factor / positive regulation of neuron apoptotic process / protein autophosphorylation / response to oxidative stress / amyloid fibril formation / Potential therapeutics for SARS / endosome membrane / receptor complex / positive regulation of canonical NF-kappaB signal transduction / non-specific serine/threonine protein kinase / Ub-specific processing proteases / protein kinase activity / intracellular signal transduction / positive regulation of apoptotic process / inflammatory response / protein serine kinase activity / protein serine/threonine kinase activity / ubiquitin protein ligase binding / apoptotic process / positive regulation of gene expression / negative regulation of apoptotic process / protein-containing complex binding / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / protein-containing complex / mitochondrion / ATP binding / identical protein binding / plasma membrane / cytosol / cytoplasm
Similarity search - Function
RIP1, Death domain / Death domain profile. / DEATH domain, found in proteins involved in cell death (apoptosis). / Death domain / Death domain / : / Death-like domain superfamily / Serine-threonine/tyrosine-protein kinase, catalytic domain / Protein tyrosine and serine/threonine kinase / Serine/threonine-protein kinase, active site ...RIP1, Death domain / Death domain profile. / DEATH domain, found in proteins involved in cell death (apoptosis). / Death domain / Death domain / : / Death-like domain superfamily / Serine-threonine/tyrosine-protein kinase, catalytic domain / Protein tyrosine and serine/threonine kinase / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Serine/Threonine protein kinases, catalytic domain / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Receptor-interacting serine/threonine-protein kinase 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 2.57 Å
AuthorsLopez-Alonso, J.P. / Ubarretxena-Belandia, I. / Jiang, H.
Funding support Spain, 1items
OrganizationGrant numberCountry
Spanish Ministry of Science, Innovation, and Universities Spain
CitationJournal: To Be Published
Title: Molecular Structure of Human Receptor Interacting Protein Kinase 1 (RIPK1) in its Fibrillar Conformation Elucidated by Solid-State NMR and Cryo-Electron Microscopy
Authors: Polonio, P. / Lopez-Alonso, J.P. / Ubarretxena-Belandia, I. / Jiang, H. / Escobedo-Gonzales, F.C. / Titaux-Delgado, G.A. / Mompean, M.
History
DepositionDec 17, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 17, 2025Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Sep 17, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Receptor-interacting serine/threonine-protein kinase 1
B: Receptor-interacting serine/threonine-protein kinase 1
C: Receptor-interacting serine/threonine-protein kinase 1
D: Receptor-interacting serine/threonine-protein kinase 1
E: Receptor-interacting serine/threonine-protein kinase 1


Theoretical massNumber of molelcules
Total (without water)48,2835
Polymers48,2835
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein
Receptor-interacting serine/threonine-protein kinase 1 / Cell death protein RIP / Receptor-interacting protein 1 / RIP-1


Mass: 9656.604 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RIPK1, RIP, RIP1 / Plasmid: pET11a / Production host: Escherichia coli BL21(DE3) (bacteria)
References: UniProt: Q13546, non-specific serine/threonine protein kinase
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: HELICAL ARRAY / 3D reconstruction method: helical reconstruction

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Sample preparation

ComponentName: hRIPK1 RHIM-mediated amyloid fibril / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: BL21(DE3) / Plasmid: pET11A
Buffer solutionpH: 7.5
Buffer componentConc.: 50 mM / Name: TrisHCl
SpecimenConc.: 0.765 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: 9 mA / Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: time 5.5s, blotting force 2

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: LAB6 / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 165000 X / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 0.88 sec. / Electron dose: 49.3 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Num. of grids imaged: 1
Image scansWidth: 5760 / Height: 4092

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.6.0particle selection
2EPU3.8.0.7600image acquisition
4cryoSPARC4.6.0CTF correction
9cryoSPARC4.6.0initial Euler assignment
10cryoSPARC4.6.0final Euler assignment
12cryoSPARC4.6.23D reconstruction
13Coot0.9.2model refinement
14PHENIX1.21model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: -7.319 ° / Axial rise/subunit: 4.667 Å / Axial symmetry: C1
Particle selectionNum. of particles selected: 2814672
3D reconstructionResolution: 2.57 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 460173 / Num. of class averages: 1 / Symmetry type: HELICAL
Atomic model buildingB value: 66.05 / Protocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingDetails: ModelAngelo using sequence / Source name: Other / Type: in silico model

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