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- EMDB-34731: The structure of MPXV polymerase holoenzyme in replicating state -

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Basic information

Entry
Database: EMDB / ID: EMD-34731
TitleThe structure of MPXV polymerase holoenzyme in replicating state
Map data
Sample
  • Complex: MPXV DNA polymerase holoenzyme
    • Protein or peptide: DNA polymerase
    • Protein or peptide: E4R
    • Protein or peptide: DNA polymerase processivity factor component A20
    • DNA: DNA (25-MER)
    • DNA: DNA (38-MER)
  • Ligand: MAGNESIUM ION
  • Ligand: THYMIDINE-5'-TRIPHOSPHATE
KeywordsMPXV / Polymerase / Replication / REPLICATION-DNA complex
Function / homology
Function and homology information


viral DNA genome replication / uracil DNA N-glycosylase activity / DNA-templated DNA replication / DNA recombination / DNA replication / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA repair / nucleotide binding / DNA binding
Similarity search - Function
DNA-directed DNA polymerase, family B, viral insert domain / DNA polymerase B exonuclease, N-terminal / DNA polymerase family B viral insert / DNA polymerase family B exonuclease domain, N-terminal / Chordopoxvirus A20R / Chordopoxvirus A20R protein / Uracil-DNA glycosylase, active site / Uracil-DNA glycosylase signature. / Uracil-DNA glycosylase-like domain superfamily / : ...DNA-directed DNA polymerase, family B, viral insert domain / DNA polymerase B exonuclease, N-terminal / DNA polymerase family B viral insert / DNA polymerase family B exonuclease domain, N-terminal / Chordopoxvirus A20R / Chordopoxvirus A20R protein / Uracil-DNA glycosylase, active site / Uracil-DNA glycosylase signature. / Uracil-DNA glycosylase-like domain superfamily / : / DNA-directed DNA polymerase, family B, multifunctional domain / DNA polymerase family B signature. / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily
Similarity search - Domain/homology
DNA polymerase / DNA polymerase processivity factor / Uracil-DNA glycosylase
Similarity search - Component
Biological speciesMonkeypox virus
Methodsingle particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsPeng Q / Xie YF / Kuai L / Wang H / Qi JX / Gao F / Shi Y
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Science / Year: 2023
Title: Structure of monkeypox virus DNA polymerase holoenzyme.
Authors: Qi Peng / Yufeng Xie / Lu Kuai / Han Wang / Jianxun Qi / George F Gao / Yi Shi /
Abstract: The World Health Organization declared mpox (or monkeypox) a public health emergency of international concern in July 2022, and prophylactic and therapeutic measures are in urgent need. The monkeypox ...The World Health Organization declared mpox (or monkeypox) a public health emergency of international concern in July 2022, and prophylactic and therapeutic measures are in urgent need. The monkeypox virus (MPXV) has its own DNA polymerase F8, together with the processive cofactors A22 and E4, constituting the polymerase holoenzyme for genome replication. Here, we determined the holoenzyme structure in complex with DNA using cryo-electron microscopy at the global resolution of ~2.8 angstroms. The holoenzyme possesses an architecture that suggests a "forward sliding clamp" processivity mechanism for viral DNA replication. MPXV polymerase has a DNA binding mode similar to that of other B-family DNA polymerases from different species. These findings reveal the mechanism of the MPXV genome replication and may guide the development of anti-poxvirus drugs.
History
DepositionNov 13, 2022-
Header (metadata) releaseDec 21, 2022-
Map releaseDec 21, 2022-
UpdateMay 29, 2024-
Current statusMay 29, 2024Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_34731.png

Downloads & links

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Map

FileDownload / File: emd_34731.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 320 pix.
= 272. Å		0.85 Å/pix.
x 320 pix.
= 272. Å		0.85 Å/pix.
x 320 pix.
= 272. Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.85 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.04
Minimum - Maximum-0.001720313 - 2.002257
Average (Standard dev.)0.0016582693 (±0.030028842)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 272.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_34731_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_34731_half_map_2.map
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Sample components

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Entire : MPXV DNA polymerase holoenzyme

EntireName: MPXV DNA polymerase holoenzyme
Components
  • Complex: MPXV DNA polymerase holoenzyme
    • Protein or peptide: DNA polymerase
    • Protein or peptide: E4R
    • Protein or peptide: DNA polymerase processivity factor component A20
    • DNA: DNA (25-MER)
    • DNA: DNA (38-MER)
  • Ligand: MAGNESIUM ION
  • Ligand: THYMIDINE-5'-TRIPHOSPHATE

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Supramolecule #1: MPXV DNA polymerase holoenzyme

SupramoleculeName: MPXV DNA polymerase holoenzyme / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Monkeypox virus

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Macromolecule #1: DNA polymerase

MacromoleculeName: DNA polymerase / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: DNA-directed DNA polymerase
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 119.939062 KDa
Recombinant expressionOrganism: Spodoptera (butterflies/moths)
SequenceString: MWSHPQFEKG SGSWSHPQFE KGSGSMDVRC INWFESHGEN RFLYLKSRCR NGETVFIRFP HYFYYVVTDE IYQSLSPPPF NARPMGKMR TIDIDETISY NLDIKDRKCS VADMWLIEEP KKRSIQNATM DEFFNISWFY ISNGISPDGC YSLDEQYLTK I NNGCYHCD ...String:
MWSHPQFEKG SGSWSHPQFE KGSGSMDVRC INWFESHGEN RFLYLKSRCR NGETVFIRFP HYFYYVVTDE IYQSLSPPPF NARPMGKMR TIDIDETISY NLDIKDRKCS VADMWLIEEP KKRSIQNATM DEFFNISWFY ISNGISPDGC YSLDEQYLTK I NNGCYHCD DPRNCFAKEI PRFDIPRSYL FLDIECHFDK KFPSVFINPI SHTSYCYIDL SGKRLLFTLI NEEMLTEQEI QE AVDRGCL RIQSLMEMDY ERELVLCSEI VLLRIAKQLL ELTFDYVVTF NGHNFDLRYI TNRLELLTGE KIIFRSPDKK EAV HLCIYE RNQSSHKGVC GMANTTFHVN NNNGTIFFDL YSFIQKSEKL DSYKLDSISK NAFSCMGKVL NRGVREMTFI GDDT TDAKG KADTFAKVLT TGNYVTVDED IICKVIRKDI LENGFKVVLS CPTLPNDIYK LSFGKDDIDL AQMYKDYNLN IALDM ARYC IHDACLCQYL WEYYGVETKT DAGAATYVLP QSMVFEYRAS TIIKGPLLKL LLETKTILVR SETKQKFPYE GGKVFA PKQ KMFSNNVLIF DYNSLYPNVC IFGNLSPETL VGVVVSTNRL EEEINNQLLL QKYPPPRYIT VHCEPRLPNL ISEIAIF DR SIEGTIPRLL RTFLAERARY KKMLKQATSS TEKAIYDSMQ YTYKIVANSV YGLMGFRNSA LYSYASAKSC TSIGRRMI L YLESVLNGAE LSNGMLRFAN TLSNPFYMDD RDINPIVKTS LPIDYRFRFR SVYGDTDSVF TEIDSQDVDK SIEIAKELE RLINSRVLFN NFKIEFEAVY KNLIMQSKKK YTTMKYSASS NSKSVPERIN KGTSETRRDV SKFHKNMIKT YKTRLSEMLS EGRMNSNQV CIDILRSLET DLRSEFDSRS SPLELFMLSR MHHSNYKSAD NPNMYLVTEY NKNNPETIEL GERYYFAYIC P ANVPWTKK LVNIKTYETI IDRSFKLGSN QRIFYEVYFK RLTSEIVNLL DNKVLCISFF QRMFGSRPTF YEA

UniProtKB: DNA polymerase

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Macromolecule #2: E4R

MacromoleculeName: E4R / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: uracil-DNA glycosylase
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 25.107742 KDa
Recombinant expressionOrganism: Spodoptera (butterflies/moths)
SequenceString: MNSVTISHAP YTITYHDDWE PVMSQLVEFY NEVASWLLRD ETSPIPDKFF IQLKQPLRNK RVCVCGIDPY PKDGTGVPFE SPNFTKKSI KEIASSISRL TGVIDYKGYN LNIIDGVIPW NYYLSCKLGE TKSHAIYWDK ISKLLLQHIT KHVSVLYCLG K TDFSNIRA ...String:
MNSVTISHAP YTITYHDDWE PVMSQLVEFY NEVASWLLRD ETSPIPDKFF IQLKQPLRNK RVCVCGIDPY PKDGTGVPFE SPNFTKKSI KEIASSISRL TGVIDYKGYN LNIIDGVIPW NYYLSCKLGE TKSHAIYWDK ISKLLLQHIT KHVSVLYCLG K TDFSNIRA KLESPVTTIV GYHPAARDHQ FEKDRSFEII NVLLELDNKT PINWAQGFIY

UniProtKB: Uracil-DNA glycosylase

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Macromolecule #3: DNA polymerase processivity factor component A20

MacromoleculeName: DNA polymerase processivity factor component A20 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 49.203926 KDa
Recombinant expressionOrganism: Spodoptera (butterflies/moths)
SequenceString: MTSSADLTNL KELLSLYKSL RFSDSVAIEK YNSLVEWGTS TYWKIGVQKV TNVETSISDY YDEVKNKPFN IDPGYYIFLP VYFGSVFIY SKGKNMVELG SGNSFQIPDE IRSACNKVLD SDNGIDFLRF VLLNNRWIME DAISKYQSPV NIFKLASEYG L NIPNYLEI ...String:
MTSSADLTNL KELLSLYKSL RFSDSVAIEK YNSLVEWGTS TYWKIGVQKV TNVETSISDY YDEVKNKPFN IDPGYYIFLP VYFGSVFIY SKGKNMVELG SGNSFQIPDE IRSACNKVLD SDNGIDFLRF VLLNNRWIME DAISKYQSPV NIFKLASEYG L NIPNYLEI EIEEDTLFDD ELYSIMERSF DDTFPKISIS YIKLGELKRQ VVDFFKFSFM YIESIKVDRI GDNIFIPSVI TK SGKKILV KDVDHLIRSK VREHTFVKVK KKNTFSILYD YDGNGTETRG EVIKRIIDTI GRDYYVNGKY FSKVGIAGLK QLT NKLDIN ECATVDELVD EINKSGTVKR KIKNQSVFDL SRECLGYPEA DFITLVNNMR FKIENCKVVN FNIENTNCLN NPSI ETIYG NFNQFVSIFN TVTDVKKRLF E

UniProtKB: DNA polymerase processivity factor

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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: Monkeypox virus
Molecular weightTheoretical: 7.681985 KDa
SequenceString:
(DA)(DG)(DC)(DT)(DA)(DT)(DG)(DA)(DC)(DC) (DA)(DT)(DG)(DA)(DT)(DT)(DA)(DC)(DG)(DA) (DA)(DT)(DT)(DG)(DC)

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Macromolecule #5: DNA (38-MER)

MacromoleculeName: DNA (38-MER) / type: dna / ID: 5 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 11.677539 KDa
SequenceString:
(DC)(DT)(DG)(DC)(DA)(DC)(DG)(DA)(DA)(DT) (DT)(DA)(DA)(DG)(DC)(DA)(DA)(DT)(DT)(DC) (DG)(DT)(DA)(DA)(DT)(DC)(DA)(DT)(DG) (DG)(DT)(DC)(DA)(DT)(DA)(DG)(DC)(DT)

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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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Macromolecule #7: THYMIDINE-5'-TRIPHOSPHATE

MacromoleculeName: THYMIDINE-5'-TRIPHOSPHATE / type: ligand / ID: 7 / Number of copies: 1 / Formula: TTP
Molecular weightTheoretical: 482.168 Da
Chemical component information

ChemComp-TTP:
THYMIDINE-5'-TRIPHOSPHATE

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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
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN 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: 1.0 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: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 43819
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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