Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 18-mer - A4B4C4D4E2 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Hetero 18-mer - A12B4C2 

Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - A4 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - B4 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - C4 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - D4 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 2-mer - E2 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Hetero 8-mer - A2B2C2D2 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Hetero 8-mer - A2B2C2D2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: native gel electrophoresis

Macromolecule Content

• Total Structure Weight: 492.27 kDa 
• Atom Count: 29,816 
• Modelled Residue Count: 2,814 
• Deposited Residue Count: 3,368 
• Unique protein chains: 5
• Unique nucleic acid chains: 2

 7C0M

Human cGAS-nucleosome complex

• PDB DOI: 10.2210/pdb7C0M/pdb
• EM Map EMD-30267: EMDB EMDataResource

• Classification: DNA BINDING PROTEIN/DNA
• Organism(s): Homo sapiens, synthetic construct
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2020-05-01 Released: 2020-09-16 
• Deposition Author(s): Kujirai, T., Zierhut, C., Takizawa, Y., Kim, R., Negishi, L., Uruma, N., Hirai, S., Funabiki, H., Kurumizaka, H.
• Funding Organization(s): Japan Society for the Promotion of Science (JSPS), Japan Science and Technology, Japan Agency for Medical Research and Development (AMED)

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Experimental Data Snapshot

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

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 370: 455-458

• PubMed: 32912999 
• DOI: 10.1126/science.abd0237
• Primary Citation of Related Structures:  
  7C0M


• PubMed Abstract: 
  

The cyclic guanosine monophosphate-adenosine monophosphate 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-electron microscopy structure of the human cGAS-nucleosome core particle (NCP) complex, two cGAS monomers bridge two NCPs by binding the acidic patch of the histone H2A-H2B dimer 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.

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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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H3.1	A, E, L [auth a], P [auth e]	139	Homo sapiens	Mutation(s): 0  Gene Names:  H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, HIST1H3I, H3C12, H3FJ, HIST1H3J
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens) Explore P68431  Go to UniProtKB:  P68431
PHAROS:  P68431

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H4	B, F, M [auth b], Q [auth f]	106	Homo sapiens	Mutation(s): 0  Gene Names:  H4C1, H4/A, H4FA, HIST1H4A, H4C2, H4/I, H4FI, HIST1H4B, H4C3, H4/G, H4FG, HIST1H4C, H4C4, H4/B, H4FB, HIST1H4D, H4C5, H4/J, H4FJ, HIST1H4E, H4C6, H4/C, H4FC, HIST1H4F, H4C8, H4/H, H4FH, HIST1H4H, H4C9, H4/M, H4FM, HIST1H4I, H4C11, H4/E, H4FE, HIST1H4J, H4C12, H4/D, H4FD, HIST1H4K, H4C13, H4/K, H4FK, HIST1H4L, H4C14, H4/N, H4F2, H4FN, HIST2H4, HIST2H4A, H4C15, H4/O, H4FO, HIST2H4B, H4-16, HIST4H4
UniProt & NIH Common Fund Data Resources
Find proteins for P62805 (Homo sapiens) Explore P62805  Go to UniProtKB:  P62805
PHAROS:  P62805

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H2A type 1-B/E	C, G, N [auth c], R [auth g]	133	Homo sapiens	Mutation(s): 0  Gene Names: H2AC4, H2AFM, HIST1H2AB, H2AC8, H2AFA, HIST1H2AE
UniProt & NIH Common Fund Data Resources
Find proteins for P04908 (Homo sapiens) Explore P04908  Go to UniProtKB:  P04908
PHAROS:  P04908

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H2B type 1-J	D, H, O [auth d], S [auth h]	129	Homo sapiens	Mutation(s): 0  Gene Names: H2BC11, H2BFR, HIST1H2BJ
UniProt & NIH Common Fund Data Resources
Find proteins for P06899 (Homo sapiens) Explore P06899  Go to UniProtKB:  P06899
PHAROS:  P06899

Entity ID: 7
Molecule	Chains	Sequence Length	Organism	Details	Image
Cyclic GMP-AMP synthase	K, V [auth k]	380	Homo sapiens	Mutation(s): 0  Gene Names: CGAS, C6orf150, MB21D1 EC: 2.7.7.86
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N884 (Homo sapiens) Explore Q8N884  Go to UniProtKB:  Q8N884
PHAROS:  Q8N884

Entity ID: 5
Molecule	Chains	Length	Organism	Image
DNA (145-MER)	I, T [auth i]	145	synthetic construct

Entity ID: 6
Molecule	Chains	Length	Organism	Image
DNA (145-MER)	J, U [auth j]	145	synthetic construct

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	W [auth K], X [auth k]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-09-16 
Deposition Author(s): Kujirai, T., Zierhut, C., Takizawa, Y., Kim, R., Negishi, L., Uruma, N., Hirai, S., Funabiki, H., Kurumizaka, H.

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Funding Organization	Location	Grant Number
Japan Society for the Promotion of Science (JSPS)	Japan	JP17H01408
Japan Society for the Promotion of Science (JSPS)	Japan	JP18H05534
Japan Society for the Promotion of Science (JSPS)	Japan	JP19K06522
Japan Science and Technology	Japan	JPMJCR16G1
Japan Agency for Medical Research and Development (AMED)	Japan	JP20am0101076
Japan Science and Technology	Japan	JPMJER1901

Revision History  

• Version 1.0: 2020-09-16
  Type: Initial release
  
• Version 1.1: 2020-09-23
  Changes: Database references
• Version 1.2: 2020-11-11
  Changes: Database references