+Open data
-Basic information
Entry | Database: PDB / ID: 5jul | ||||||
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Title | Near atomic structure of the Dark apoptosome | ||||||
Components | Apaf-1 related killer DARK | ||||||
Keywords | APOPTOSIS / Dark / apoptosome / apotosis / AAA+ ATPase | ||||||
Function / homology | Function and homology information negative regulation of humoral immune response / positive regulation of glial cell apoptotic process / Formation of apoptosome / salivary gland histolysis / positive regulation of compound eye retinal cell programmed cell death / melanization defense response / sarcosine catabolic process / Activation of caspases through apoptosome-mediated cleavage / Regulation of the apoptosome activity / central nervous system formation ...negative regulation of humoral immune response / positive regulation of glial cell apoptotic process / Formation of apoptosome / salivary gland histolysis / positive regulation of compound eye retinal cell programmed cell death / melanization defense response / sarcosine catabolic process / Activation of caspases through apoptosome-mediated cleavage / Regulation of the apoptosome activity / central nervous system formation / chaeta development / sperm individualization / apoptosome / autophagic cell death / Neutrophil degranulation / CARD domain binding / S-adenosylmethionine cycle / programmed cell death / triglyceride homeostasis / dendrite morphogenesis / response to starvation / cysteine-type endopeptidase activator activity involved in apoptotic process / response to gamma radiation / ADP binding / neuron cellular homeostasis / positive regulation of apoptotic process / ATP binding / identical protein binding Similarity search - Function | ||||||
Biological species | Drosophila melanogaster (fruit fly) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.4 Å | ||||||
Authors | Cheng, T.C. / Akey, I.V. / Yuan, S. / Yu, Z. / Ludtke, S.J. / Akey, C.W. | ||||||
Funding support | United States, 1items
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Citation | Journal: Structure / Year: 2017 Title: A Near-Atomic Structure of the Dark Apoptosome Provides Insight into Assembly and Activation. Authors: Tat Cheung Cheng / Ildikó V Akey / Shujun Yuan / Zhiheng Yu / Steven J Ludtke / Christopher W Akey / Abstract: In Drosophila, the Apaf-1-related killer (Dark) forms an apoptosome that activates procaspases. To investigate function, we have determined a near-atomic structure of Dark double rings using cryo- ...In Drosophila, the Apaf-1-related killer (Dark) forms an apoptosome that activates procaspases. To investigate function, we have determined a near-atomic structure of Dark double rings using cryo-electron microscopy. We then built a nearly complete model of the apoptosome that includes 7- and 8-blade β-propellers. We find that the preference for dATP during Dark assembly may be governed by Ser325, which is in close proximity to the 2' carbon of the deoxyribose ring. Interestingly, β-propellers in V-shaped domains of the Dark apoptosome are more widely separated, relative to these features in the Apaf-1 apoptosome. This wider spacing may be responsible for the lack of cytochrome c binding to β-propellers in the Dark apoptosome. Our structure also highlights the roles of two loss-of-function mutations that may block Dark assembly. Finally, the improved model provides a framework to understand apical procaspase activation in the intrinsic cell death pathway. | ||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 5jul.cif.gz | 3.3 MB | Display | PDBx/mmCIF format |
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PDB format | pdb5jul.ent.gz | Display | PDB format | |
PDBx/mmJSON format | 5jul.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 5jul_validation.pdf.gz | 2.1 MB | Display | wwPDB validaton report |
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Full document | 5jul_full_validation.pdf.gz | 3 MB | Display | |
Data in XML | 5jul_validation.xml.gz | 631.6 KB | Display | |
Data in CIF | 5jul_validation.cif.gz | 892.2 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ju/5jul ftp://data.pdbj.org/pub/pdb/validation_reports/ju/5jul | HTTPS FTP |
-Related structure data
Related structure data | 8177MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 166131.000 Da / Num. of mol.: 16 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Drosophila melanogaster (fruit fly) Gene: Dark, Ark, Ark-RB, dapaf-1L, Hac1, CG6829, Dmel_CG6829 Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q7KLI1 #2: Chemical | ChemComp-DTP / |
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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 |
-Sample preparation
Component | Name: Dark apoptosome / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | ||||||||||||||||||||||||||||||
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Molecular weight | Value: 2.3 MDa / Experimental value: NO | ||||||||||||||||||||||||||||||
Source (natural) | Organism: Drosophila melanogaster (fruit fly) | ||||||||||||||||||||||||||||||
Source (recombinant) | Organism: Spodoptera frugiperda (fall armyworm) / Plasmid: pFastBac | ||||||||||||||||||||||||||||||
Buffer solution | pH: 7.5 / Details: Buffer A | ||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 2 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: C-flat-1.2/1.3 | ||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 293 K Details: 2.5ul sample blot additives present at the indicated final concentrations: NP-40 (0.025%), DHPG (diheptanoylphosphatidylglycerol; 0.05%), cytochrome c (0.5 mg/ml), DeoxybigChaps (0.01%), and lysine (0.03 mg/ml) |
-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 FIELD / Nominal magnification: 81000 X / Nominal defocus max: 2400 nm / Nominal defocus min: 1500 nm / Cs: 0.01 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 0.3 sec. / Electron dose: 1.8 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1991 |
EM imaging optics | Energyfilter name: GIF / Spherical aberration corrector: FEI Cs corrector |
Image scans | Width: 7476 / Height: 7420 / Movie frames/image: 23 / Used frames/image: 2-23 |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 88485 | ||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: D8 (2x8 fold dihedral) | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 17769 / Algorithm: FOURIER SPACE / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT Details: local fitting with Chimera followed by flexible fitting with MDFF and refinement with Phenix. |