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- EMDB-70428: CryoEM structure of Cad1 bound with cA4 and ATP, hexamer with thr... -

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ID or keywords:

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Basic information

Entry
Database: EMDB / ID: EMD-70428
TitleCryoEM structure of Cad1 bound with cA4 and ATP, hexamer with three intact dimers
Map data
Sample
  • Complex: Cad1
    • Protein or peptide: CRISPR-associated ring nuclease and adenosine deaminase, subunit A
    • RNA: cA4 cleavage product, A2>P
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
  • Ligand: water
KeywordsCRISPR-associated Rossman-fold (CARF) / ATP deaminase / CRISPR immunity / cooperative activation / IMMUNE SYSTEM / HYDROLASE
Function / homology
Function and homology information


inosine biosynthetic process / adenosine deaminase / hypoxanthine salvage / adenosine deaminase activity / adenosine catabolic process / cytosol
Similarity search - Function
CRISPR-assoc protein, NE0113/Csx13 / CRISPR-associated protein NE0113 (Cas_NE0113) / Adenosine deaminase domain / Adenosine deaminase / Adenosine/adenine deaminase / Metal-dependent hydrolase
Similarity search - Domain/homology
Biological speciesThermoanaerobaculum aquaticum (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.17 Å
AuthorsZhao Y / Li H
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM252081 United States
CitationJournal: To Be Published
Title: Sequential Conformational Activation of a CARF-Fused Adenosine Deaminase by Cyclic Oligoadenylates
Authors: Roth M / Shu Y / Trasandidou D / Zhao Y / van der Oost J / Li H
History
DepositionApr 29, 2025-
Header (metadata) releaseAug 20, 2025-
Map releaseAug 20, 2025-
UpdateAug 20, 2025-
Current statusAug 20, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_70428.png

Downloads & links

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Map

FileDownload / File: emd_70428.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 384 pix.
= 318.72 Å		0.83 Å/pix.
x 384 pix.
= 318.72 Å		0.83 Å/pix.
x 384 pix.
= 318.72 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.12
Minimum - Maximum-0.5694554 - 1.0483984
Average (Standard dev.)0.0011146833 (±0.031527817)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 318.72 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_70428_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_70428_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Cad1

EntireName: Cad1
Components
  • Complex: Cad1
    • Protein or peptide: CRISPR-associated ring nuclease and adenosine deaminase, subunit A
    • RNA: cA4 cleavage product, A2>P
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
  • Ligand: water

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Supramolecule #1: Cad1

SupramoleculeName: Cad1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Thermoanaerobaculum aquaticum (bacteria)

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Macromolecule #1: CRISPR-associated ring nuclease and adenosine deaminase, subunit A

MacromoleculeName: CRISPR-associated ring nuclease and adenosine deaminase, subunit A
type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO / EC number: adenosine deaminase
Source (natural)Organism: Thermoanaerobaculum aquaticum (bacteria)
Molecular weightTheoretical: 69.499133 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MRILLCSVGT SWAVVPEAMQ LLGSQGFDEV HVLTTASSKI SPGVEQLLRY FEMHPGPRFS ISRVQDFEDL RSEQDHMLFE EVLWRWLLQ RAPQAAHRYI CLAGGYKTIS AAMQRAAALF GACEVFHVLC EPRFGPQGNR EASTLEEVEQ AIATNALRFV R LGPEPGWP ...String:
MRILLCSVGT SWAVVPEAMQ LLGSQGFDEV HVLTTASSKI SPGVEQLLRY FEMHPGPRFS ISRVQDFEDL RSEQDHMLFE EVLWRWLLQ RAPQAAHRYI CLAGGYKTIS AAMQRAAALF GACEVFHVLC EPRFGPQGNR EASTLEEVEQ AIATNALRFV R LGPEPGWP QLRLLSAPSF PLESTLQGPV HWVRASDMRL RQHVEGVLER SRHILAAWEG ISELPIPALA AWPPSHLRWL HE PLDPVQD KAWVQALPKV ELHCHLGGFA THGELLHKVR QEAANPESLP PVRAIPLPPG WPIPEEPIGL ERYMRLGDNN GSA LLKDPG CLRAQCRLLY EALLADHVAY AEIRCSPANY ASASRSPWVV LQEIRNHFQQ AMEETPEDRR CHVNLLLTAT REEG GDRSR IARHLALAIT AAEHWKNGCR VVGVDLAGFE DRTTRAAMFA TDFEPVHRVG LAVTVHAGEN DDVEGIWQAV FKLSA RRLG HALHLSRSPD LLRVVAERGI AVELCPYANL QIKGFPLDEE QEGSETYPLR GYLAAGVAVT LNTDNLGISQ ASLTDN LLL TARLCPGITR LEVLKTQVFA AQAAFANQAE RKALWARLAQ VPVPTDTEQK NGNDAKASHQ PR

UniProtKB: adenosine deaminase

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Macromolecule #2: cA4 cleavage product, A2>P

MacromoleculeName: cA4 cleavage product, A2>P / type: rna / ID: 2 / Number of copies: 6
Source (natural)Organism: Thermoanaerobaculum aquaticum (bacteria)
Molecular weightTheoretical: 675.419 Da
SequenceString:
A(A23)

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Macromolecule #3: ADENOSINE-5'-TRIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 3 / Number of copies: 6 / Formula: ATP
Molecular weightTheoretical: 507.181 Da
Chemical component information

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

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Macromolecule #4: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 4 / Number of copies: 6 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #5: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 5 / Number of copies: 8 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #6: water

MacromoleculeName: water / type: ligand / ID: 6 / Number of copies: 27 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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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

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.8200000000000001 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.17 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 41951
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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