7C0M

Human cGAS-nucleosome complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 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 for the inhibition of cGAS by nucleosomes.

Kujirai, T.Zierhut, C.Takizawa, Y.Kim, R.Negishi, L.Uruma, N.Hirai, S.Funabiki, H.Kurumizaka, H.

(2020) Science 

  • DOI: 10.1126/science.abd0237
  • Primary Citation of Related Structures:  
    7C0M

  • PubMed Abstract: 
  • The cyclic GMP-AMP synthase (cGAS) senses invasion of pathogenic DNA and stimulates inflammatory signaling, autophagy and apoptosis. Organization of host DNA into nucleosomes was proposed to limit cGAS autoinduction, but the underlying mechanism was ...

    The cyclic GMP-AMP synthase (cGAS) senses invasion of pathogenic DNA and stimulates inflammatory signaling, autophagy and apoptosis. Organization of host DNA into nucleosomes was proposed to limit cGAS autoinduction, but the underlying mechanism was unknown. Here, we report the structural basis for this inhibition. In the cryo-EM structure of the human cGAS-nucleosome core particle (NCP) complex, two cGAS monomers bridge two NCPs by binding the acidic patch of H2A-H2B and nucleosomal DNA. In this configuration, all three known cGAS DNA-binding sites, required for cGAS activation, are repurposed or become inaccessible, and cGAS dimerization, another prerequisite for activation, is inhibited. Mutating key residues linking cGAS and the acidic patch alleviates nucleosomal inhibition. This study establishes a structural framework for why cGAS is silenced on chromatinized self-DNA.


    Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3.1AEae139Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P68431 (Homo sapiens)
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PHAROS  P68431
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4BFbf106Homo 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 1-B/ECGcg133Homo sapiensMutation(s): 0 
Gene Names: H2AC4H2AFMHIST1H2ABH2AC8H2AFAHIST1H2AE
Find proteins for P04908 (Homo sapiens)
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PHAROS  P04908
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B type 1-JDHdh129Homo sapiensMutation(s): 0 
Gene Names: H2BC11H2BFRHIST1H2BJ
Find proteins for P06899 (Homo sapiens)
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PHAROS  P06899
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  • Reference Sequence
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Cyclic GMP-AMP synthaseKk380Homo sapiensMutation(s): 0 
Gene Names: CGASC6orf150MB21D1
EC: 2.7.7.86
Find proteins for Q8N884 (Homo sapiens)
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PHAROS  Q8N884
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsLengthOrganismImage
DNA (145-MER)I, i145synthetic construct
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Entity ID: 6
MoleculeChainsLengthOrganismImage
DNA (145-MER)J, j145synthetic construct
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of Science (JSPS)JapanJP17H01408
Japan Society for the Promotion of Science (JSPS)JapanJP18H05534
Japan Society for the Promotion of Science (JSPS)JapanJP19K06522
Japan Science and TechnologyJapanJPMJCR16G1
Japan Agency for Medical Research and Development (AMED)JapanJP20am0101076
Japan Science and TechnologyJapanJPMJER1901

Revision History 

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