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Open data
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Basic information
Entry | Database: PDB / ID: 7da4 | ||||||
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Title | Cryo-EM structure of amyloid fibril formed by human RIPK3 | ||||||
![]() | Receptor-interacting serine/threonine-protein kinase 3 | ||||||
![]() | PROTEIN FIBRIL / Amyloid fibril | ||||||
Function / homology | ![]() regulation of activation-induced cell death of T cells / regulation of CD8-positive, alpha-beta cytotoxic T cell extravasation / execution phase of necroptosis / regulation of T cell mediated cytotoxicity / regulation of adaptive immune response / regulation of activated T cell proliferation / positive regulation of phosphatase activity / regulation of type II interferon production / TRIF-mediated programmed cell death / TLR3-mediated TICAM1-dependent programmed cell death ...regulation of activation-induced cell death of T cells / regulation of CD8-positive, alpha-beta cytotoxic T cell extravasation / execution phase of necroptosis / regulation of T cell mediated cytotoxicity / regulation of adaptive immune response / regulation of activated T cell proliferation / positive regulation of phosphatase activity / regulation of type II interferon production / TRIF-mediated programmed cell death / TLR3-mediated TICAM1-dependent programmed cell death / Microbial modulation of RIPK1-mediated regulated necrosis / programmed necrotic cell death / SARS-CoV-1-mediated effects on programmed cell death / necroptotic signaling pathway / positive regulation of necroptotic process / RIP-mediated NFkB activation via ZBP1 / TRP channels / non-canonical NF-kappaB signal transduction / RIPK1-mediated regulated necrosis / activation of protein kinase activity / T cell homeostasis / necroptotic process / lymph node development / positive regulation of intrinsic apoptotic signaling pathway / spleen development / reactive oxygen species metabolic process / TICAM1, RIP1-mediated IKK complex recruitment / IKK complex recruitment mediated by RIP1 / thymus development / apoptotic signaling pathway / protein modification process / Regulation of necroptotic cell death / cellular response to hydrogen peroxide / SARS-CoV-1 activates/modulates innate immune responses / positive regulation of reactive oxygen species metabolic process / positive regulation of NF-kappaB transcription factor activity / T cell differentiation in thymus / regulation of apoptotic process / defense response to virus / transcription coactivator activity / protein autophosphorylation / amyloid fibril formation / non-specific serine/threonine protein kinase / protein kinase activity / protein serine kinase activity / protein serine/threonine kinase activity / protein-containing complex binding / signal transduction / protein-containing complex / ATP binding / identical protein binding / nucleus / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 4.24 Å | ||||||
![]() | Zhao, K. / Ma, Y.Y. / Sun, Y.P. / Li, D. / Liu, C. | ||||||
![]() | ![]() Title: The structure of a minimum amyloid fibril core formed by necroptosis-mediating RHIM of human RIPK3. Authors: Xialian Wu / Yeyang Ma / Kun Zhao / Jing Zhang / Yunpeng Sun / Yichen Li / Xingqi Dong / Hong Hu / Jing Liu / Jian Wang / Xia Zhang / Bing Li / Huayi Wang / Dan Li / Bo Sun / Junxia Lu / Cong Liu / ![]() Abstract: Receptor-interacting protein kinases 3 (RIPK3), a central node in necroptosis, polymerizes in response to the upstream signals and then activates its downstream mediator to induce cell death. The ...Receptor-interacting protein kinases 3 (RIPK3), a central node in necroptosis, polymerizes in response to the upstream signals and then activates its downstream mediator to induce cell death. The active polymeric form of RIPK3 has been indicated as the form of amyloid fibrils assembled via its RIP homotypic interaction motif (RHIM). In this study, we combine cryogenic electron microscopy and solid-state NMR to determine the amyloid fibril structure of RIPK3 RHIM-containing C-terminal domain (CTD). The structure reveals a single protofilament composed of the RHIM domain. RHIM forms three β-strands (referred to as strands 1 through 3) folding into an S shape, a distinct fold from that in complex with RIPK1. The consensus tetrapeptide VQVG of RHIM forms strand 2, which zips up strands 1 and 3 via heterozipper-like interfaces. Notably, the RIPK3-CTD fibril, as a physiological fibril, exhibits distinctive assembly compared with pathological fibrils. It has an exceptionally small fibril core and twists in both handedness with the smallest pitch known so far. These traits may contribute to a favorable spatial arrangement of RIPK3 kinase domain for efficient phosphorylation. | ||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 27.7 KB | Display | ![]() |
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PDB format | ![]() | 13.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 30622MC ![]() 7dacC 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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Components
#1: Protein | Mass: 15311.755 Da / Num. of mol.: 3 / Fragment: C-terminal domain Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q9Y572, non-specific serine/threonine protein kinase |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: HELICAL ARRAY / 3D reconstruction method: helical reconstruction |
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Sample preparation
Component | Name: human RIPK3-CTD amyloid fibril / Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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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 |
Image recording | Electron dose: 55 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
CTF correction | Type: NONE |
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Helical symmerty | Angular rotation/subunit: -7.53 ° / Axial rise/subunit: 4.8 Å / Axial symmetry: C1 |
3D reconstruction | Resolution: 4.24 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 45526 / Symmetry type: HELICAL |