7JOA

2:1 cGAS-nucleosome complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis of nucleosome-dependent cGAS inhibition.

Boyer, J.A.Spangler, C.J.Strauss, J.D.Cesmat, A.P.Liu, P.McGinty, R.K.Zhang, Q.

(2020) Science 

  • DOI: 10.1126/science.abd0609
  • Primary Citation of Related Structures:  
    7JO9, 7JOA

  • PubMed Abstract: 
  • Cyclic GMP-AMP synthase (cGAS) recognizes cytosolic foreign or damaged DNA to activate the innate immune response to infection, inflammatory diseases, and cancer. In contrast, cGAS reactivity against self-DNA in the nucleus is suppressed by chromatin ...

    Cyclic GMP-AMP synthase (cGAS) recognizes cytosolic foreign or damaged DNA to activate the innate immune response to infection, inflammatory diseases, and cancer. In 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 employs two conserved arginines to anchor to the nucleosome acidic patch. The nucleosome binding interface exclusively occupies the strong 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.


    Organizational Affiliation

    Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3.2AE136Homo sapiensMutation(s): 0 
Gene Names: H3C15HIST2H3AH3C14H3F2H3FMHIST2H3CH3C13HIST2H3D
Find proteins for Q71DI3 (Homo sapiens)
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PHAROS  Q71DI3
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4BF103Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P62805 (Homo sapiens)
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PHAROS  P62805
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2A type 1CG129Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P0C0S8 (Homo sapiens)
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Go to UniProtKB:  P0C0S8
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PHAROS  P0C0S8
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B type 1-C/E/F/G/IDH125Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P62807 (Homo sapiens)
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PHAROS  P62807
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  • Reference Sequence
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Cyclic GMP-AMP synthaseK366Mus musculusMutation(s): 0 
Gene Names: CgasMb21d1
EC: 2.7.7.86
Find proteins for Q8C6L5 (Mus musculus)
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsLengthOrganismImage
DNA (145-MER)I147synthetic construct
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Entity ID: 6
MoleculeChainsLengthOrganismImage
DNA (145-MER)J147synthetic construct
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
K
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R35GM133498
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesR21CA234979

Revision History 

  • Version 1.0: 2020-09-16
    Type: Initial release
  • Version 1.1: 2020-09-23
    Changes: Database references