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- EMDB-22408: 1:1 cGAS-nucleosome complex -

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Basic information

Entry
Database: EMDB / ID: EMD-22408
Title1:1 cGAS-nucleosome complex
Map data1:1 cGAS-NCP map
Sample
  • Complex: 1:1 cGAS-nucleosome complex
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A type 1
    • Protein or peptide: Histone H2B type 1-C/E/F/G/I
    • DNA: DNA (145-MER)
    • DNA: DNA (145-MER)
    • Protein or peptide: Cyclic GMP-AMP synthase
  • Ligand: ZINC ION
KeywordscGAS / nucleosome / cyclic GMP-AMP synthase / DNA Binding Protein-DNA-Transferase complex
Function / homology
Function and homology information


2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / regulation of type I interferon production / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / regulation of immunoglobulin production / negative regulation of DNA repair / cGAS/STING signaling pathway / regulation of T cell activation / : ...2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / regulation of type I interferon production / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / regulation of immunoglobulin production / negative regulation of DNA repair / cGAS/STING signaling pathway / regulation of T cell activation / : / negative regulation of cGAS/STING signaling pathway / cellular response to exogenous dsRNA / positive regulation of type I interferon production / regulation of immune response / negative regulation of double-strand break repair via homologous recombination / : / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / nucleosome binding / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / positive regulation of defense response to virus by host / phosphatidylinositol-4,5-bisphosphate binding / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Deposition of new CENPA-containing nucleosomes at the centromere / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / telomere organization / activation of innate immune response / Interleukin-7 signaling / Inhibition of DNA recombination at telomere / RNA Polymerase I Promoter Opening / Meiotic synapsis / Assembly of the ORC complex at the origin of replication / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / SUMOylation of chromatin organization proteins / DNA methylation / Condensation of Prophase Chromosomes / Chromatin modifications during the maternal to zygotic transition (MZT) / SIRT1 negatively regulates rRNA expression / HCMV Late Events / innate immune response in mucosa / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / determination of adult lifespan / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / HDACs deacetylate histones / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / Transcriptional regulation by small RNAs / molecular condensate scaffold activity / Formation of the beta-catenin:TCF transactivating complex / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / HDMs demethylate histones / G2/M DNA damage checkpoint / NoRC negatively regulates rRNA expression / DNA Damage/Telomere Stress Induced Senescence / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / Meiotic recombination / Pre-NOTCH Transcription and Translation / Metalloprotease DUBs / RMTs methylate histone arginines / Activation of anterior HOX genes in hindbrain development during early embryogenesis / Transcriptional regulation of granulopoiesis / HCMV Early Events / antimicrobial humoral immune response mediated by antimicrobial peptide / structural constituent of chromatin / UCH proteinases / antibacterial humoral response / positive regulation of cellular senescence / nucleosome / heterochromatin formation / nucleosome assembly / E3 ubiquitin ligases ubiquitinate target proteins / Recruitment and ATM-mediated phosphorylation of repair and signaling proteins at DNA double strand breaks / site of double-strand break / HATs acetylate histones / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Factors involved in megakaryocyte development and platelet production / chromatin organization / MLL4 and MLL3 complexes regulate expression of PPARG target genes in adipogenesis and hepatic steatosis / Processing of DNA double-strand break ends / Senescence-Associated Secretory Phenotype (SASP) / double-stranded DNA binding / Oxidative Stress Induced Senescence / defense response to virus / gene expression / Estrogen-dependent gene expression / chromosome, telomeric region / defense response to Gram-positive bacterium / Ub-specific processing proteases / nuclear body / Amyloid fiber formation
Similarity search - Function
Mab-21-like, nucleotidyltransferase domain / Mab-21 protein nucleotidyltransferase domain / Mab-21-like / Mab-21-like, HhH/H2TH-like domain / Mab-21 protein HhH/H2TH-like domain / Mab-21 / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. ...Mab-21-like, nucleotidyltransferase domain / Mab-21 protein nucleotidyltransferase domain / Mab-21-like / Mab-21-like, HhH/H2TH-like domain / Mab-21 protein HhH/H2TH-like domain / Mab-21 / : / Histone H2B signature. / Histone H2A conserved site / Histone H2A signature. / Histone H2B / Histone H2B / Histone H2A, C-terminal domain / C-terminus of histone H2A / Histone 2A / Histone H2A / TATA box binding protein associated factor / TATA box binding protein associated factor (TAF), histone-like fold domain / Histone H4, conserved site / Histone H4 signature. / Histone H4 / Histone H4 / CENP-T/Histone H4, histone fold / Centromere kinetochore component CENP-T histone fold / Histone H3 signature 1. / Histone H3 signature 2. / Histone H3 / Histone H3/CENP-A / Histone H2A/H2B/H3 / Core histone H2A/H2B/H3/H4 domain / Histone-fold
Similarity search - Domain/homology
Histone H2A type 1 / Histone H4 / Histone H2B type 1-C/E/F/G/I / Histone H3.2 / Cyclic GMP-AMP synthase
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsBoyer JA / Spangler CJ
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1R35GM133498 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)R21CA234979 United States
CitationJournal: Science / Year: 2020
Title: Structural basis of nucleosome-dependent cGAS inhibition.
Authors: Joshua A Boyer / Cathy J Spangler / Joshua D Strauss / Andrew P Cesmat / Pengda Liu / Robert K McGinty / Qi Zhang /
Abstract: Cyclic guanosine monophosphate (GMP)-adenosine monophosphate (AMP) synthase (cGAS) recognizes cytosolic foreign or damaged DNA to activate the innate immune response to infection, inflammatory ...Cyclic guanosine monophosphate (GMP)-adenosine monophosphate (AMP) synthase (cGAS) recognizes cytosolic foreign or damaged DNA to activate the innate immune response to infection, inflammatory diseases, and cancer. By contrast, cGAS reactivity against self-DNA in the nucleus is suppressed by chromatin tethering. We report a 3.3-angstrom-resolution cryo-electron microscopy structure of cGAS in complex with the nucleosome core particle. The structure reveals that cGAS uses two conserved arginines to anchor to the nucleosome acidic patch. The nucleosome-binding interface exclusively occupies the strong double-stranded DNA (dsDNA)-binding surface on cGAS and sterically prevents cGAS from oligomerizing into the functionally active 2:2 cGAS-dsDNA state. These findings provide a structural basis for how cGAS maintains an inhibited state in the nucleus and further exemplify the role of the nucleosome in regulating diverse nuclear protein functions.
History
DepositionAug 6, 2020-
Header (metadata) releaseSep 16, 2020-
Map releaseSep 16, 2020-
UpdateMar 6, 2024-
Current statusMar 6, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7jo9
  • Surface level: 0.018
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22408.png

Downloads & links

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Map

FileDownload / File: emd_22408.map.gz / Format: CCP4 / Size: 137.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotation1:1 cGAS-NCP map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.91 Å/pix.
x 330 pix.
= 300.3 Å		0.91 Å/pix.
x 330 pix.
= 300.3 Å		0.91 Å/pix.
x 330 pix.
= 300.3 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.91 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.02 / Movie #1: 0.02
Minimum - Maximum-0.06437187 - 0.12129947
Average (Standard dev.)0.00016497131 (±0.0026456509)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions330330330
Spacing330330330
CellA=B=C: 300.30002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.910.910.91
M x/y/z330330330
origin x/y/z0.0000.0000.000
length x/y/z300.300300.300300.300
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS330330330
D min/max/mean-0.0640.1210.000

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Supplemental data

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Sample components

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Entire : 1:1 cGAS-nucleosome complex

EntireName: 1:1 cGAS-nucleosome complex
Components
  • Complex: 1:1 cGAS-nucleosome complex
    • Protein or peptide: Histone H3.2
    • Protein or peptide: Histone H4
    • Protein or peptide: Histone H2A type 1
    • Protein or peptide: Histone H2B type 1-C/E/F/G/I
    • DNA: DNA (145-MER)
    • DNA: DNA (145-MER)
    • Protein or peptide: Cyclic GMP-AMP synthase
  • Ligand: ZINC ION

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Supramolecule #1: 1:1 cGAS-nucleosome complex

SupramoleculeName: 1:1 cGAS-nucleosome complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#7 / Details: mouse cGAS bound to the nucleosome in a 1:1 ratio
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 250 KDa

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Macromolecule #1: Histone H3.2

MacromoleculeName: Histone H3.2 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 15.421101 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MARTKQTARK STGGKAPRKQ LATKAARKSA PATGGVKKPH RYRPGTVALR EIRRYQKSTE LLIRKLPFQR LVREIAQDFK TDLRFQSSA VMALQEASEA YLVGLFEDTN LCAIHAKRVT IMPKDIQLAR RIRGERA

UniProtKB: Histone H3.2

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Macromolecule #2: Histone H4

MacromoleculeName: Histone H4 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 11.394426 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MSGRGKGGKG LGKGGAKRHR KVLRDNIQGI TKPAIRRLAR RGGVKRISGL IYEETRGVLK VFLENVIRDA VTYTEHAKRK TVTAMDVVY ALKRQGRTLY GFGG

UniProtKB: Histone H4

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Macromolecule #3: Histone H2A type 1

MacromoleculeName: Histone H2A type 1 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.990342 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
SGRGKQGGKA RAKAKTRSSR AGLQFPVGRV HRLLRKGNYA ERVGAGAPVY LAAVLEYLTA EILELAGNAA RDNKKTRIIP RHLQLAIRN DEELNKLLGK VTIAQGGVLP NIQAVLLPKK TESHHKAKGK

UniProtKB: Histone H2A type 1

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Macromolecule #4: Histone H2B type 1-C/E/F/G/I

MacromoleculeName: Histone H2B type 1-C/E/F/G/I / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.806018 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
PEPAKSAPAP KKGSKKAVTK AQKKDGKKRK RSRKESYSVY VYKVLKQVHP DTGISSKAMG IMNSFVNDIF ERIAGEASRL AHYNKRSTI TSREIQTAVR LLLPGELAKH AVSEGTKAVT KYTSSK

UniProtKB: Histone H2B type 1-C/E/F/G/I

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Macromolecule #7: Cyclic GMP-AMP synthase

MacromoleculeName: Cyclic GMP-AMP synthase / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO / EC number: cyclic GMP-AMP synthase
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 42.984664 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: GSRKEPDKLK KVLDKLRLKR KDISEAAETV NKVVERLLRR MQKRESEFKG VEQLNTGSYY EHVKISAPNE FDVMFKLEVP RIELQEYYE TGAFYLVKFK RIPRGNPLSH FLEGEVLSAT KMLSKFRKII KEEVKEIKDI DVSVEKEKPG SPAVTLLIRN P EEISVDII ...String:
GSRKEPDKLK KVLDKLRLKR KDISEAAETV NKVVERLLRR MQKRESEFKG VEQLNTGSYY EHVKISAPNE FDVMFKLEVP RIELQEYYE TGAFYLVKFK RIPRGNPLSH FLEGEVLSAT KMLSKFRKII KEEVKEIKDI DVSVEKEKPG SPAVTLLIRN P EEISVDII LALESKGSWP ISTKEGLPIQ GWLGTKVRTN LRREPFYLVP KNAKDGNSFQ GETWRLSFSH TEKYILNNHG IE KTCCESS GAKCCRKECL KLMKYLLEQL KKEFQELDAF CSYHVKTAIF HMWTQDPQDS QWDPRNLSSC FDKLLAFFLE CLR TEKLDH YFIPKFNLFS QELIDRKSKE FLSKKIEYER NNGFPIFDKL

UniProtKB: Cyclic GMP-AMP synthase

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Macromolecule #5: DNA (145-MER)

MacromoleculeName: DNA (145-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 45.610043 KDa
SequenceString: (DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC) ...String:
(DA)(DT)(DC)(DG)(DG)(DA)(DT)(DG)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DC)(DT)(DG)(DA)(DC) (DA)(DC)(DG)(DT)(DG)(DC)(DC)(DT)(DG) (DG)(DA)(DG)(DA)(DC)(DT)(DA)(DG)(DG)(DG) (DA) (DG)(DT)(DA)(DA)(DT)(DC)(DC)(DC) (DC)(DT)(DT)(DG)(DG)(DC)(DG)(DG)(DT)(DT) (DA)(DA) (DA)(DA)(DC)(DG)(DC)(DG)(DG) (DG)(DG)(DG)(DA)(DC)(DA)(DG)(DC)(DG)(DC) (DG)(DT)(DA) (DC)(DG)(DT)(DG)(DC)(DG) (DT)(DT)(DT)(DA)(DA)(DG)(DC)(DG)(DG)(DT) (DG)(DC)(DT)(DA) (DG)(DA)(DG)(DC)(DT) (DG)(DT)(DC)(DT)(DA)(DC)(DG)(DA)(DC)(DC) (DA)(DA)(DT)(DT)(DG) (DA)(DG)(DC)(DG) (DG)(DC)(DC)(DT)(DC)(DG)(DG)(DC)(DA)(DC) (DC)(DG)(DG)(DG)(DA)(DT) (DT)(DC)(DT) (DC)(DG)(DA)(DT)

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Macromolecule #6: DNA (145-MER)

MacromoleculeName: DNA (145-MER) / type: dna / ID: 6 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 45.13877 KDa
SequenceString: (DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA) (DA)(DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA) (DG) (DA)(DC)(DA)(DG)(DC)(DT) ...String:
(DA)(DT)(DC)(DG)(DA)(DG)(DA)(DA)(DT)(DC) (DC)(DC)(DG)(DG)(DT)(DG)(DC)(DC)(DG)(DA) (DG)(DG)(DC)(DC)(DG)(DC)(DT)(DC)(DA) (DA)(DT)(DT)(DG)(DG)(DT)(DC)(DG)(DT)(DA) (DG) (DA)(DC)(DA)(DG)(DC)(DT)(DC)(DT) (DA)(DG)(DC)(DA)(DC)(DC)(DG)(DC)(DT)(DT) (DA)(DA) (DA)(DC)(DG)(DC)(DA)(DC)(DG) (DT)(DA)(DC)(DG)(DC)(DG)(DC)(DT)(DG)(DT) (DC)(DC)(DC) (DC)(DC)(DG)(DC)(DG)(DT) (DT)(DT)(DT)(DA)(DA)(DC)(DC)(DG)(DC)(DC) (DA)(DA)(DG)(DG) (DG)(DG)(DA)(DT)(DT) (DA)(DC)(DT)(DC)(DC)(DC)(DT)(DA)(DG)(DT) (DC)(DT)(DC)(DC)(DA) (DG)(DG)(DC)(DA) (DC)(DG)(DT)(DG)(DT)(DC)(DA)(DG)(DA)(DT) (DA)(DT)(DA)(DT)(DA)(DC) (DA)(DT)(DC) (DC)(DG)(DA)(DT)

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Macromolecule #8: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 8 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
20.0 mMC8H18N2O4SHEPES
150.0 mMNaClsodium chloride
1.0 mMC9H15O6PTCEP
GridModel: Quantifoil / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Details: Instrument: Pelco easiGlow
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 293 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 2100 / Average electron dose: 53.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 433445
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6esf


Details: low-pass filtered to 50A
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1-beta) / Number images used: 116377
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1-beta)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1-beta)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

6fq5

source_name: PDB, initial_model_type: experimental model

4k8v

source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL
Output model

PDB-7jo9:
1:1 cGAS-nucleosome complex

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