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- EMDB-29323: Structure of RdrA from Escherichia coli RADAR defense system -

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Basic information

Entry
Database: EMDB / ID: EMD-29323
TitleStructure of RdrA from Escherichia coli RADAR defense system
Map dataE. coli RdrA no split map
Sample
  • Complex: E. coli RdrA complex
    • Protein or peptide: Archaeal ATPase
Keywordsanti-phage defense / ATPase / RADAR / IMMUNE SYSTEM
Function / homologyP-loop containing nucleoside triphosphate hydrolase / Archaeal ATPase
Function and homology information
Biological speciesEscherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.52 Å
AuthorsDuncan-Lowey B / Johnson AG / Rawson S / Mayer ML / Kranzusch PJ
Funding support United States, 4 items
OrganizationGrant numberCountry
The Pew Charitable Trusts United States
Burroughs Wellcome Fund United States
The G. Harold and Leila Y. Mathers Foundation United States
The Pew Charitable Trusts United States
CitationJournal: Cell / Year: 2023
Title: Cryo-EM structure of the RADAR supramolecular anti-phage defense complex.
Authors: Brianna Duncan-Lowey / Nitzan Tal / Alex G Johnson / Shaun Rawson / Megan L Mayer / Shany Doron / Adi Millman / Sarah Melamed / Taya Fedorenko / Assaf Kacen / Alexander Brandis / Tevie ...Authors: Brianna Duncan-Lowey / Nitzan Tal / Alex G Johnson / Shaun Rawson / Megan L Mayer / Shany Doron / Adi Millman / Sarah Melamed / Taya Fedorenko / Assaf Kacen / Alexander Brandis / Tevie Mehlman / Gil Amitai / Rotem Sorek / Philip J Kranzusch /
Abstract: RADAR is a two-protein bacterial defense system that was reported to defend against phage by "editing" messenger RNA. Here, we determine cryo-EM structures of the RADAR defense complex, revealing ...RADAR is a two-protein bacterial defense system that was reported to defend against phage by "editing" messenger RNA. Here, we determine cryo-EM structures of the RADAR defense complex, revealing RdrA as a heptameric, two-layered AAA+ ATPase and RdrB as a dodecameric, hollow complex with twelve surface-exposed deaminase active sites. RdrA and RdrB join to form a giant assembly up to 10 MDa, with RdrA docked as a funnel over the RdrB active site. Surprisingly, our structures reveal an RdrB active site that targets mononucleotides. We show that RdrB catalyzes ATP-to-ITP conversion in vitro and induces the massive accumulation of inosine mononucleotides during phage infection in vivo, limiting phage replication. Our results define ATP mononucleotide deamination as a determinant of RADAR immunity and reveal supramolecular assembly of a nucleotide-modifying machine as a mechanism of anti-phage defense.
History
DepositionDec 28, 2022-
Header (metadata) releaseFeb 1, 2023-
Map releaseFeb 1, 2023-
UpdateJun 19, 2024-
Current statusJun 19, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_29323.png

Downloads & links

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Map

FileDownload / File: emd_29323.map.gz / Format: CCP4 / Size: 274.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationE. coli RdrA no split map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 416 pix.
= 343.2 Å		0.83 Å/pix.
x 416 pix.
= 343.2 Å		0.83 Å/pix.
x 416 pix.
= 343.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.825 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.65
Minimum - Maximum-2.9870303 - 4.641412
Average (Standard dev.)-0.0010620201 (±0.12166739)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions416416416
Spacing416416416
CellA=B=C: 343.19998 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: E. coli RdrA no split half map A

Fileemd_29323_half_map_1.map
AnnotationE. coli RdrA no split half map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: E. coli RdrA no split half map B

Fileemd_29323_half_map_2.map
AnnotationE. coli RdrA no split half map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : E. coli RdrA complex

EntireName: E. coli RdrA complex
Components
  • Complex: E. coli RdrA complex
    • Protein or peptide: Archaeal ATPase

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Supramolecule #1: E. coli RdrA complex

SupramoleculeName: E. coli RdrA complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Escherichia coli (E. coli)

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Macromolecule #1: Archaeal ATPase

MacromoleculeName: Archaeal ATPase / type: protein_or_peptide / ID: 1 / Number of copies: 7 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 107.226594 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MTDSVQTETT KGKIIINLFA PNLSGSTKED DLIQKSLRDQ LVESIRNSIA YPDTDKFAGL TRFIDEPGRN VFFVDGTRGA GKTTFINSV VKSLNSDQDD VKVNIKCLPT IDPTKLPRHE PILVTVTARL NKMVSDKLKG YWASNDYRKQ KEQWQNHLAQ L QRGLHLLT ...String:
MTDSVQTETT KGKIIINLFA PNLSGSTKED DLIQKSLRDQ LVESIRNSIA YPDTDKFAGL TRFIDEPGRN VFFVDGTRGA GKTTFINSV VKSLNSDQDD VKVNIKCLPT IDPTKLPRHE PILVTVTARL NKMVSDKLKG YWASNDYRKQ KEQWQNHLAQ L QRGLHLLT DKEYKPEYFS DALKLDAQLD YSIGGQDLSE IFEELVKRAC EILDCKAILI TFDDIDTQFD AGWDVLESIR KF FNSRKLV VVATGDLRLY SQLIRGKQYE NYSKTLLEQE KESVRLAERG YMVEHLEQQY LLKLFPVQKR IQLKTMLQLV GEK GKAGKE EIKVKTEPSM QDIDAIDVRQ AIGDAVREGL NLREGSDADM YVNELLKQPV RLLMQVLQDF YTKKYHATSV KLDG KQSRN ERPDELSVPN LLRNALYGSM LSNIYRAGLN YEQHRFGMDS LCKDIFTYVK QDRDFNTGFY LRPQSESEAL RNCSI YLAS QVSENCQGSL SKFLQMLLVG CGSVSIFNQF VTELARAEND REKFEQLISE YVAYMSVGRI ESASHWANRC CAVVAN SPN DEKIGVFLGM VQLNRKSRQN MPEGYKKFNI DTENGLAKAA MASSLSTVAS NNLMDFCSVF NLIGAIADIS ACRCERS AI TNAFNKVIAQ TTCIVPPWSE AAVRAEMKGS SKSADNDAAV LDVDLDPKDD GVIDESQQDD ATEFSDAITK VEQWLKNV N EIEIGIRPSA LLIGKVWSRF YFNLNNVADQ HKTRLYRNAE HGRMASQSNA AKIMRFNVLA FLHAVLVEES LYHSVSDRE YIGEGLRLNP VTSVDEFEKK IKIIGEKLKA DNKTWKNTHP LFFLLISCPI LHPFIFPIGG INCSVKALNK ETSFNKLIDE IVGDKLLSD EEWDYLTKNN DQKTNTRQQI FQNTITSLNS STIVGASYDK DTPARKTKSP SLGDSEEK

UniProtKB: Archaeal ATPase

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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
Component:
ConcentrationFormulaName
100.0 mMKClpotassium chloride
50.0 mMHEPES
1.0 mMTCEP
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 48.8 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: OTHER / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.52 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 472729
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER

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