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- EMDB-62002: Cryo-EM structure of the TbaIscB-omega RNA-target DNA complex -

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Basic information

Entry
Database: EMDB / ID: EMD-62002
TitleCryo-EM structure of the TbaIscB-omega RNA-target DNA complex
Map data
Sample
  • Complex: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex
    • Protein or peptide: TbaIscB
    • RNA: Omega RNA
    • DNA: Target DNA strand
    • DNA: Non-target DNA strand
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
KeywordsRNA-guided DNA nuclease / RNA BINDING PROTEIN
Biological speciesTissierellia bacterium (bacteria) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.17 Å
AuthorsNagahata N / Yamada S / Yamashita K / Nishimasu H
Funding support Japan, 3 items
OrganizationGrant numberCountry
Japan Science and TechnologyJPMJCR23B6 Japan
Japan Society for the Promotion of Science (JSPS)JP21H05281 Japan
Japan Society for the Promotion of Science (JSPS)JP22H00403 Japan
CitationJournal: To Be Published
Title: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex
Authors: Nagahata N
History
DepositionOct 18, 2024-
Header (metadata) releaseFeb 4, 2026-
Map releaseFeb 4, 2026-
UpdateFeb 4, 2026-
Current statusFeb 4, 2026Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_62002.png

Downloads & links

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Map

FileDownload / File: emd_62002.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.11 Å/pix.
x 240 pix.
= 265.6 Å		1.11 Å/pix.
x 240 pix.
= 265.6 Å		1.11 Å/pix.
x 240 pix.
= 265.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.10667 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.35
Minimum - Maximum-0.9862526 - 1.9605732
Average (Standard dev.)0.0013131575 (±0.05848999)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 265.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_62002_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_62002_half_map_1.map
Projections & Slices
AxesZYX

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Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_62002_half_map_2.map
Projections & Slices
AxesZYX

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Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Cryo-EM structure of the TbIscB-omega RNA-target DNA complex

EntireName: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex
Components
  • Complex: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex
    • Protein or peptide: TbaIscB
    • RNA: Omega RNA
    • DNA: Target DNA strand
    • DNA: Non-target DNA strand
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex

SupramoleculeName: Cryo-EM structure of the TbIscB-omega RNA-target DNA complex
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Tissierellia bacterium (bacteria)

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Macromolecule #1: TbaIscB

MacromoleculeName: TbaIscB / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Tissierellia bacterium (bacteria)
Molecular weightTheoretical: 119.250188 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MSKHHHHSGH HHTGHHHHSG SHHHTGKTEE GKLVIWINGD KGYNGLAEVG KKFEKDTGIK VTVEHPDKLE EKFPQVAATG DGPDIIFWA HDRFGGYAQS GLLAEITPDK AFQDKLYPFT WDAVRYNGKL IAYPIAVEAL SLIYNKDLLP NPPKTWEEIP A LDKELKAK ...String:
MSKHHHHSGH HHTGHHHHSG SHHHTGKTEE GKLVIWINGD KGYNGLAEVG KKFEKDTGIK VTVEHPDKLE EKFPQVAATG DGPDIIFWA HDRFGGYAQS GLLAEITPDK AFQDKLYPFT WDAVRYNGKL IAYPIAVEAL SLIYNKDLLP NPPKTWEEIP A LDKELKAK GKSALMFNLQ EPYFTWPLIA ADGGYAFKYE NGKYDIKDVG VDNAGAKAGL TFLVDLIKNK HMNADTDYSI AE AAFNKGE TAMTINGPWA WSNIDTSKVN YGVTVLPTFK GQPSKPFVGV LSAGINAASP NKELAKEFLE NYLLTDEGLE AVN KDKPLG AVALKSYEEE LAKDPRIAAT MENAQKGEIM PNIPQMSAFW YAVRTAVINA ASGRQTVDEA LKDAQTNSSS AAGG EEDKK PAGGEGGGAH INLKVKGQDG NEVFFRIKRS TQLKKLMNAY CDRQSVDMTA IAFLFDGRRL RAEQTPDELE MEDGD EIDA MLHQTGGSSG SMKVFVVDKN NNPLMPTHPA KARILLKNGK ATVKRVEPFV IKLNYTIDNP KTQNVKVGIA DGARNA GLA VVVEKSKKDD EVVFKGQIDL NNMIKDKMEE RSNYRRCRRT RLRYRKPRFN NRKRNKCVVC GGNTQSGKNT CRLHKVT DK QNKLKNTYWL PPSLKARKDC IVRVLNQLNK WIPINNIIIE TGRFDIQKLV NPDLSGAGYQ QGAKYGRDSV KSALIYEY G KEVRDENNKI KKIARCCYCG KEGVPLEIEA IKPRGQGGTD AWHNLTLACK KCNKEKGNRT PQQANMKLIV KPSKFHLSK TLKYAAQLQQ GKNYLRQAIK DAVNIFPSYT YGQFTSWQRK RFNIPKTHMN DAIVIAITNY DTENKPRLPV VNCDEYYIKP IGTKSRSLF TATCYSPKDY CYNNEGKRKR INSINAAVLT NNNKTIRALK EINKACVLLE KNNKIVPKAI RMIEDIPDNA I MVVEKGDT VECNVGKKKL RGIVSACMSN GNIKINVQGK QQSASLKKTR LIYKKQNIIF QKIHKTTKSS GLVPRGSHMA SW SHPQFEK GGGSGGGSGG SAWSHPQFEK N

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Macromolecule #2: Omega RNA

MacromoleculeName: Omega RNA / type: rna / ID: 2 / Number of copies: 1
Source (natural)Organism: Tissierellia bacterium (bacteria)
Molecular weightTheoretical: 142.207906 KDa
SequenceString: GGGGAAAUUA GGUGCGCUUG GCCUUUCAGC UAUAGACUUU CACGAUCUAC AAUUGUAACC GACCCGAAAA UACCCAUUAC AUAAGUCUC CGUAUGAUUU AUAACUAAUA CAAUAUCGAA GAUUAACUUU CUGUUAAAAA ACCGUUGCAA UCUGCGAGAA A UGUGUCUA ...String:
GGGGAAAUUA GGUGCGCUUG GCCUUUCAGC UAUAGACUUU CACGAUCUAC AAUUGUAACC GACCCGAAAA UACCCAUUAC AUAAGUCUC CGUAUGAUUU AUAACUAAUA CAAUAUCGAA GAUUAACUUU CUGUUAAAAA ACCGUUGCAA UCUGCGAGAA A UGUGUCUA UAGCUGUGAG UCAGCCCUAG UGACAAACCC CUAGUAAUAG GAAUAAGGAU GAACUACCUU UGCUGCAAUG UU AAAGUAU CACUUUAAAA UGUUCGAUCC AGUUUUAAAC CCUGAUACCU UAUAAGUAGG ACAACUCGCC CCACGGGGGA AGG UAAAAU AGGUGUGAGC CUAUCCACGU CUUAUAAGGA UGUACACCAG CAAAGUUGGG CAAGGAUCAA AUUAACCUUU AUUC UAGUA UUCUAGUAAU AAAGAGAAAA UCUUAUUAUG AGGUGCAU

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Macromolecule #3: Target DNA strand

MacromoleculeName: Target DNA strand / type: dna / ID: 3 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 13.028337 KDa
SequenceString:
(DA)(DC)(DC)(DC)(DG)(DT)(DT)(DG)(DG)(DC) (DC)(DT)(DC)(DC)(DA)(DA)(DG)(DC)(DG)(DC) (DA)(DC)(DC)(DT)(DA)(DA)(DT)(DT)(DT) (DC)(DC)(DC)(DC)(DG)(DG)(DG)(DA)(DT)(DC) (DC) (DT)(DC)(DT)

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Macromolecule #4: Non-target DNA strand

MacromoleculeName: Non-target DNA strand / type: dna / ID: 4 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 13.433622 KDa
SequenceString:
(DA)(DG)(DA)(DG)(DG)(DA)(DT)(DC)(DC)(DC) (DG)(DG)(DG)(DG)(DA)(DA)(DA)(DT)(DT)(DA) (DG)(DG)(DT)(DG)(DG)(DC)(DG)(DA)(DA) (DC)(DC)(DA)(DG)(DG)(DC)(DC)(DA)(DA)(DC) (DG) (DG)(DG)(DT)

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #6: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 6 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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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: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: cryoSPARC / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.17 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 94390
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
FSC plot (resolution estimation)

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