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- EMDB-61621: Bacteriophage T4 topoisomerse II bound with a T-segment DNA -

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Basic information

Entry
Database: EMDB / ID: EMD-61621
TitleBacteriophage T4 topoisomerse II bound with a T-segment DNA
Map dataSharp map of phage T4 Topo II bound with a T-segment DNA.
Sample
  • Complex: Bacteriophage T4 topoisomerase II central domian bound with a T-segment DNA
    • Protein or peptide: DNA topoisomerase large subunit,DNA topoisomerase small subunit
    • Protein or peptide: DNA topoisomerase medium subunit
    • DNA: DNA (25-MER)
    • DNA: DNA (25-MER)
KeywordsType IIA topoisomerase / T-segment DNA / ISOMERASE/DNA / ISOMERASE-DNA complex
Function / homology
Function and homology information


sister chromatid segregation / DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) complex / DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) activity / DNA topoisomerase (ATP-hydrolysing) / DNA topological change / protein-containing complex / DNA binding / ATP binding
Similarity search - Function
C-terminal associated domain of TOPRIM / C-terminal associated domain of TOPRIM / DNA topoisomerase II, eukaryotic-type / : / Topoisomerase (Topo) IIA-type catalytic domain profile. / DNA topoisomerase, type IIA, alpha-helical domain superfamily / DNA topoisomerase, type IIA, domain A / DNA topoisomerase, type IIA, domain A, alpha-beta / DNA gyrase/topoisomerase IV, subunit A / DNA Topoisomerase IV ...C-terminal associated domain of TOPRIM / C-terminal associated domain of TOPRIM / DNA topoisomerase II, eukaryotic-type / : / Topoisomerase (Topo) IIA-type catalytic domain profile. / DNA topoisomerase, type IIA, alpha-helical domain superfamily / DNA topoisomerase, type IIA, domain A / DNA topoisomerase, type IIA, domain A, alpha-beta / DNA gyrase/topoisomerase IV, subunit A / DNA Topoisomerase IV / DNA topoisomerase, type IIA, subunit B, domain 2 / DNA gyrase B / DNA topoisomerase, type IIA / DNA topoisomerase, type IIA, conserved site / DNA topoisomerase II signature. / TopoisomeraseII / DNA topoisomerase, type IIA, subunit B, C-terminal / DNA topoisomerase, type IIA-like domain superfamily / Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase / Histidine kinase-like ATPases / Histidine kinase/HSP90-like ATPase superfamily / Ribosomal protein S5 domain 2-type fold, subgroup / Ribosomal protein S5 domain 2-type fold
Similarity search - Domain/homology
DNA topoisomerase medium subunit / DNA topoisomerase large subunit / DNA topoisomerase small subunit
Similarity search - Component
Biological speciesEnterobacteria phage T4 (virus) / Escherichia phage T4 (virus) / DNA molecule (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.03 Å
AuthorsXin YH / Chen YT
Funding support China, 1 items
OrganizationGrant numberCountry
Chinese Academy of Sciences China
CitationJournal: To be published
Title: Structural and functional insights into the T-even type bacteriophage topoisomerase II
Authors: Xin YH / Chen YT
History
DepositionSep 23, 2024-
Header (metadata) releaseOct 1, 2025-
Map releaseOct 1, 2025-
UpdateOct 1, 2025-
Current statusOct 1, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_61621.png

Downloads & links

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Map

FileDownload / File: emd_61621.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharp map of phage T4 Topo II bound with a T-segment DNA.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.04 Å/pix.
x 240 pix.
= 249.6 Å		1.04 Å/pix.
x 240 pix.
= 249.6 Å		1.04 Å/pix.
x 240 pix.
= 249.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.04 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.18
Minimum - Maximum-1.8325964 - 2.57546
Average (Standard dev.)-0.00018213165 (±0.059316013)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 249.59999 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half map of phage T4 Topo II bound with a T-segment DNA.

Fileemd_61621_half_map_1.map
AnnotationHalf map of phage T4 Topo II bound with a T-segment DNA.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map of phage T4 Topo II bound with a T-segment DNA.

Fileemd_61621_half_map_2.map
AnnotationHalf map of phage T4 Topo II bound with a T-segment DNA.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Bacteriophage T4 topoisomerase II central domian bound with a T-s...

EntireName: Bacteriophage T4 topoisomerase II central domian bound with a T-segment DNA
Components
  • Complex: Bacteriophage T4 topoisomerase II central domian bound with a T-segment DNA
    • Protein or peptide: DNA topoisomerase large subunit,DNA topoisomerase small subunit
    • Protein or peptide: DNA topoisomerase medium subunit
    • DNA: DNA (25-MER)
    • DNA: DNA (25-MER)

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Supramolecule #1: Bacteriophage T4 topoisomerase II central domian bound with a T-s...

SupramoleculeName: Bacteriophage T4 topoisomerase II central domian bound with a T-segment DNA
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Enterobacteria phage T4 (virus)

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Macromolecule #1: DNA topoisomerase large subunit,DNA topoisomerase small subunit

MacromoleculeName: DNA topoisomerase large subunit,DNA topoisomerase small subunit
type: protein_or_peptide / ID: 1 / Details: fusion protein (gp39+gp60) / Number of copies: 2 / Enantiomer: LEVO / EC number: DNA topoisomerase (ATP-hydrolysing)
Source (natural)Organism: Escherichia phage T4 (virus)
Molecular weightTheoretical: 77.524703 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MIKNEIKILS DIEHIKKRSG MYIGSSANET HERFMFGKWE SVQYVPGLVK LIDEIIDNSV DEGIRTKFKF ANKINVTIKN NQVTVEDNG RGIPQAMVKT PTGEEIPGPV AAWTIPKAGG NFGDDKERVT GGMNGVGSSL TNIFSVMFVG ETGDGQNNIV V RCSNGMEN ...String:
MIKNEIKILS DIEHIKKRSG MYIGSSANET HERFMFGKWE SVQYVPGLVK LIDEIIDNSV DEGIRTKFKF ANKINVTIKN NQVTVEDNG RGIPQAMVKT PTGEEIPGPV AAWTIPKAGG NFGDDKERVT GGMNGVGSSL TNIFSVMFVG ETGDGQNNIV V RCSNGMEN KSWEDIPGKW KGTRVTFIPD FMSFETNELS QVYLDITLDR LQTLAVVYPD IQFTFNGKKV QGNFKKYARQ YD EHAIVQE QENCSIAVGR SPDGFRQLTY VNNIHTKNGG HHIDCAMDDI CEDLIPQIKR KFKIDVTKAR VKECLTIVMF VRD MKNMRL IRQTKERLTS PFGEIRSHIQ LDAKKISRDI LNNEAILMPI IEAALARKLA AEKAAETKAA KKASKAKVHK HIKA NLCGK DADTTLFLTE GDSAIGYLID VRDKELHGGY PLRGKVLNSW GMSYADMLKN KELFDICAIT GLVLGEKAFE EKEDG EWFT FELNGDTIIV NENDEVQING KWITVGELRK NLMKFVKIDS SSVDMKKYKL QNNVRRSIKS SSMNYANVAI MTDADH DGL GSIYPSLLGF FSNWPELFEQ GRIRFVKTPV IIAQVGKKQE WFYTVAEYES AKDALPKHSI RYIKGLGSLE KSEYREM IQ NPVYDVVKLP ENWKELFEML MGDNADLRKE WMSQHHHHHH

UniProtKB: DNA topoisomerase large subunit, DNA topoisomerase small subunit

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Macromolecule #2: DNA topoisomerase medium subunit

MacromoleculeName: DNA topoisomerase medium subunit / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO / EC number: DNA topoisomerase (ATP-hydrolysing)
Source (natural)Organism: Escherichia phage T4 (virus)
Molecular weightTheoretical: 51.951973 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MQLNNRDLKS IIDNEALAYA MYTVENRAIP NMIDGFKPVQ RFVIARALDL ARGNKDKFHK LASIAGGVAD LGYHHGENSA QDAGALMAN TWNNNFPLLD GQGNFGSRTV QKAAASRYIF ARVSKNFYNV YKDTEYAPVH QDKEHIPPAF YLPIIPTVLL N GVSGIATG ...String:
MQLNNRDLKS IIDNEALAYA MYTVENRAIP NMIDGFKPVQ RFVIARALDL ARGNKDKFHK LASIAGGVAD LGYHHGENSA QDAGALMAN TWNNNFPLLD GQGNFGSRTV QKAAASRYIF ARVSKNFYNV YKDTEYAPVH QDKEHIPPAF YLPIIPTVLL N GVSGIATG YATYILPHSV SSVKKAVLQA LQGKKVTKPK VEFPEFRGEV VEIDGQYEIR GTYKFTSRTQ MHITEIPYKY DR ETYVSKI LDPLENKGFI TWDDACGEHG FGFKVKFRKE YSLSDNEEER HAKIMKDFGL IERRSQNITV INEKGKLQVY DNV VDLIKD FVEVRKTYVQ KRIDNKIKET ESAFRLAFAK AHFIKKVISG EIVVQGKTRK ELTEELSKID MYSSYVDKLV GMNI FHMTS DEAKKLAEEA KAKKEENEYW KTTDVVTEYT KDLEEIKHHH HHHHHHH

UniProtKB: DNA topoisomerase medium subunit

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Macromolecule #3: DNA (25-MER)

MacromoleculeName: DNA (25-MER) / type: dna / ID: 3 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: DNA molecule (others)
Molecular weightTheoretical: 7.668031 KDa
SequenceString:
(DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA) (DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA) (DT)(DA)(DT)(DA)(DT)

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Macromolecule #4: DNA (25-MER)

MacromoleculeName: DNA (25-MER) / type: dna / ID: 4 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: DNA molecule (others)
Molecular weightTheoretical: 7.677045 KDa
SequenceString:
(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT) (DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT)(DA)(DT) (DA)(DT)(DA)(DT)(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: 6
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: COUNTING / 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: 2.0 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING ONLY
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.03 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 164653
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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