7a08

CryoEM Structure of cGAS Nucleosome complex

Method: ELECTRON MICROSCOPY

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Cyclic GMP-AMP synthase

Mus musculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 9 DNA 2	Nucleosomal DNA strand 1 × 1 Nucleosomal DNA strand 2 × 1 Histone H2A type 1-C × 2 （Q93077） Histone H2B type 1-C/E/F/G/I × 2 （P62807） Histone H3.3 × 2 （P84243） Histone H4 × 2 （P62805） ZINC ION × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CGAS_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain a； PDBConstruct 2–370； UniProt 139–507

Histone H2A type 1-C

Homo sapiens

UniProt Q93077

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 9 DNA 2	Cyclic GMP-AMP synthase × 1 （Q8C6L5） Nucleosomal DNA strand 1 × 1 Nucleosomal DNA strand 2 × 1 Histone H2B type 1-C/E/F/G/I × 2 （P62807） Histone H3.3 × 2 （P84243） Histone H4 × 2 （P62805） ZINC ION × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H2A1C_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain b； PDBConstruct 1–129； UniProt 2–130 Author chain f； PDBConstruct 1–129； UniProt 2–130

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

Homo sapiens

UniProt P62807

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 9 DNA 2	Cyclic GMP-AMP synthase × 1 （Q8C6L5） Nucleosomal DNA strand 1 × 1 Nucleosomal DNA strand 2 × 1 Histone H2A type 1-C × 2 （Q93077） Histone H3.3 × 2 （P84243） Histone H4 × 2 （P62805） ZINC ION × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H2B1C_HUMAN
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain c； PDBConstruct 1–125； UniProt 2–126 Author chain g； PDBConstruct 1–125； UniProt 2–126

Histone H3.3

Homo sapiens

UniProt P84243

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 9 DNA 2	Cyclic GMP-AMP synthase × 1 （Q8C6L5） Nucleosomal DNA strand 1 × 1 Nucleosomal DNA strand 2 × 1 Histone H2A type 1-C × 2 （Q93077） Histone H2B type 1-C/E/F/G/I × 2 （P62807） Histone H4 × 2 （P62805） ZINC ION × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H33_HUMAN
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain d； PDBConstruct 1–135； UniProt 2–136 Author chain h； PDBConstruct 1–135； UniProt 2–136

Histone H4

Homo sapiens

UniProt P62805

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 9 DNA 2	Cyclic GMP-AMP synthase × 1 （Q8C6L5） Nucleosomal DNA strand 1 × 1 Nucleosomal DNA strand 2 × 1 Histone H2A type 1-C × 2 （Q93077） Histone H2B type 1-C/E/F/G/I × 2 （P62807） Histone H3.3 × 2 （P84243） ZINC ION × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	H4_HUMAN
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain e； PDBConstruct 1–102； UniProt 2–103 Author chain i； PDBConstruct 1–102； UniProt 2–103

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	7a08
Deposition date deposition_date	2020-08-07
Structure title title	CryoEM Structure of cGAS Nucleosome complex
Keywords keywords	complex, immune protein, nuclear protein, TRANSFERASE; TRANSFERASE
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

7a08__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

7a08__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7a08__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	42.10 Å
Rg (electron density)	40.54 Å
Total Rg	41.07 Å
Atom count	13969
Residues	1333
Excluded volume	232240 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7a08__assembly_1__model_1`	undecameric （11）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (8)

Entity 1 Entity 1 polymer

Description description	Cyclic GMP-AMP synthase
Molecular weight formula_weight	43401.2 kDa
EC 编号 ec_number	2.7.7.86
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	a
Atom count atom_count	13969

GAMRGSRKEPDKLKKVLDKLRLKRKDISEAAETVNKVVERLLRRMQKRESEFKGVEQLNTGSYYEHVKISAPNEFDVMFKLEVPRIELQEYYETGAFYLVKFKRIPRGNPLSHFLEGEVLSATKMLSKFRKIIKEEVKEIKDIDVSVEKEKPGSPAVTLLIRNPEEISVDIILALESKGSWPISTKEGLPIQGWLGTKVRTNLRREPFYLVPKNAKDGNSFQGETWRLSFSHTEKYILNNHGIEKTCCESSGAKCCRKECLKLMKYLLEQLKKEFQELDAFCSYHVKTAIFHMWTQDPQDSQWDPRNLSSCFDKLLAFFLECLRTEKLDHYFIPKFNLFSQELIDRKSKEFLSKKIEYERNNGFPIFDKL

Source Source

Source organism organism	Mus musculus
Common name common_name	Mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Nucleosomal DNA strand 1
Molecular weight formula_weight	45145.8 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	I

CTGGAGAATCCCGGTGCCGAGGCCGCTCAATTGGTCGTAGCAAGCTCTAGCACCGCTTAAACGCACGTACGCGCTGTCCCCCGCGTTTTAACCGCCAAGGGGATTACTCCCTAGTCTCCAGGCACGTGTCAGATATATACATCCTGT

Entity 3 Entity 3 polymer

Description description	Nucleosomal DNA strand 2
Molecular weight formula_weight	45604.0 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	J

ACAGGATGTATATATCTGACACGTGCCTGGAGACTAGGGAGTAATCCCCTTGGCGGTTAAAACGCGGGGGACAGCGCGTACGTGCGTTTAAGCGGTGCTAGAGCTTGCTACGACCAATTGAGCGGCCTCGGCACCGGGATTCTCCAG

Entity 4 Entity 4 polymer

Description description	Histone H2A type 1-C
Molecular weight formula_weight	14004.3 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	b,f

SGRGKQGGKARAKAKSRSSRAGLQFPVGRVHRLLRKGNYAERVGAGAPVYLAAVLEYLTAEILELAGNAARDNKKTRIIPRHLQLAIRNDEELNKLLGRVTIAQGGVLPNIQAVLLPKKTESHHKAKGK

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 5 Entity 5 polymer

Description description	Histone H2B type 1-C/E/F/G/I
Molecular weight formula_weight	13806.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	c,g

PEPAKSAPAPKKGSKKAVTKAQKKDGKKRKRSRKESYSVYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGEASRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 6 Entity 6 polymer

Description description	Histone H3.3
Molecular weight formula_weight	15229.8 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	d,h

ARTKQTARKSTGGKAPRKQLATKAARKSAPSTGGVKKPHRYRPGTVALREIRRYQKSTELLIRKLPFQRLVREIAQDFKTDLRFQSAAIGALQEASEAYLVGLFEDTNLCAIHAKRVTIMPKDIQLARRIRGERA

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 7 Entity 7 polymer

Description description	Histone H4
Molecular weight formula_weight	11263.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	e,i

SGRGKGGKGLGKGGAKRHRKVLRDNIQGITKPAIRRLARRGGVKRISGLIYEETRGVLKVFLENVIRDAVTYTEHAKRKTVTAMDVVYALKRQGRTLYGFGG

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 8 Entity 8 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	3.11 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	172977

CryoEM Structure of cGAS Nucleosome complex

1. Protein Identity and Related Structures Protein Identity & Related Structures

Cyclic GMP-AMP synthase

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H2A type 1-C

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

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

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H3.3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Histone H4

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

7a08__assembly_1__model_1

7a08__assembly_1__model_1 | I(q)

7a08__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (8)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

Entity 6 Entity 6 polymer

Polymer Polymer

Source Source

Entity 7 Entity 7 polymer

Polymer Polymer

Source Source

Entity 8 Entity 8 non-polymer

7. Citations (1)