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- EMDB-38395: The Cryo-EM structure of MPXV E5 in complex with DNA -

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Basic information

Entry
Database: EMDB / ID: EMD-38395
TitleThe Cryo-EM structure of MPXV E5 in complex with DNA
Map data
Sample
  • Virus: Monkeypox virus
    • Protein or peptide: Monkeypox virus E5
    • DNA: DNA (70-MER)
  • Ligand: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION
Keywordsprimase / helicase / REPLICATION
Function / homologyDNA primase/nucleoside triphosphatase, C-terminal / Poxvirus D5 protein-like / Bacteriophage/plasmid primase, P4, C-terminal / D5 N terminal like / Helicase, superfamily 3, DNA virus / Superfamily 3 helicase of DNA viruses domain profile. / hydrolase activity / P-loop containing nucleoside triphosphate hydrolase / Uncoating factor OPG117
Function and homology information
Biological speciesMonkeypox virus
Methodsingle particle reconstruction / cryo EM / Resolution: 2.74 Å
AuthorsZhang W / Liu Y / Gao H / Gan J
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Cell Discov / Year: 2024
Title: Structural and functional insights into the helicase protein E5 of Mpox virus.
Authors: Weizhen Zhang / Yusong Liu / Mengquan Yang / Jie Yang / Zhiwei Shao / Yanqing Gao / Xinran Jiang / Ruixue Cui / Yixi Zhang / Xin Zhao / Qiyuan Shao / Chulei Cao / Huili Li / Linxi Li / Hehua ...Authors: Weizhen Zhang / Yusong Liu / Mengquan Yang / Jie Yang / Zhiwei Shao / Yanqing Gao / Xinran Jiang / Ruixue Cui / Yixi Zhang / Xin Zhao / Qiyuan Shao / Chulei Cao / Huili Li / Linxi Li / Hehua Liu / Haishan Gao / Jianhua Gan /
Abstract: Mpox virus (MPXV) can cause mpox in humans. Due to its quick and wide spread in the past two years, mpox has turned into a significant public health concern. Helicase E5 is a multi-domain protein; ...Mpox virus (MPXV) can cause mpox in humans. Due to its quick and wide spread in the past two years, mpox has turned into a significant public health concern. Helicase E5 is a multi-domain protein; its primer synthesis and DNA unwinding activity are required for genome uncoating and DNA replication of MPXV. However, the in vitro DNA unwinding activity has never been demonstrated. Here, we report the structural and biochemical studies of MPXV E5, showing that the full-length protein adopts an auto-inhibited conformation. Truncation of the N-terminus can recover the in vitro unwinding activity of E5 towards the forked DNA. Further structural analysis reveals that MPXV E5 shares a conserved mechanism in DNA unwinding and primer synthesis with the homologous proteins. These findings not only advance our understanding on the function of MPXV E5, but also provide a solid basis for the development of anti-poxvirus drugs.
History
DepositionDec 20, 2023-
Header (metadata) releaseMay 1, 2024-
Map releaseMay 1, 2024-
UpdateJul 3, 2024-
Current statusJul 3, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_38395.png

Downloads & links

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Map

FileDownload / File: emd_38395.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 280 pix.
= 301.644 Å		1.08 Å/pix.
x 280 pix.
= 301.644 Å		1.08 Å/pix.
x 280 pix.
= 301.644 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.0773 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.546
Minimum - Maximum-2.8510683 - 5.632436
Average (Standard dev.)0.00026547423 (±0.12843102)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 301.64398 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_38395_half_map_1.map
Projections & Slices
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Density Histograms

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Histogram (log scale)

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Half map: #1

Fileemd_38395_half_map_2.map
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Sample components

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Entire : Monkeypox virus

EntireName: Monkeypox virus
Components
  • Virus: Monkeypox virus
    • Protein or peptide: Monkeypox virus E5
    • DNA: DNA (70-MER)
  • Ligand: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Monkeypox virus

SupramoleculeName: Monkeypox virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 / NCBI-ID: 10244 / Sci species name: Monkeypox virus / Virus type: VIRION / Virus isolate: SPECIES / Virus enveloped: Yes / Virus empty: Yes

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Macromolecule #1: Monkeypox virus E5

MacromoleculeName: Monkeypox virus E5 / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 90.476344 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MDAAIRGNDV IFVLKTIGVP SACRQNEDPR FVEAFKCDEL ERYIDNNPEC TLFESLRDEE AYSIVRIFMD VDLDACLDEI DYLTAIQDF IIEVSNCVAR FAFTECGAIH ENVIKSMRSN FSLTKSTNRD KTSFHIIFLD TYTTMDTLIA MKRTLLELSR S SENPLTRS ...String:
MDAAIRGNDV IFVLKTIGVP SACRQNEDPR FVEAFKCDEL ERYIDNNPEC TLFESLRDEE AYSIVRIFMD VDLDACLDEI DYLTAIQDF IIEVSNCVAR FAFTECGAIH ENVIKSMRSN FSLTKSTNRD KTSFHIIFLD TYTTMDTLIA MKRTLLELSR S SENPLTRS IDTAVYRRKT TLRVVGTRKN PNCDTIHVMQ PPHDNIEDYL FTYVDMNNNS YYFSLQRRLE DLVPDKLWEP GF ISFEDAI KRVSKIFINS IINFNDLDEN NFTTVPLVID YVTPCALCKK RSHKHPHQLS LENGAIRIYK TGNPHSCKVK IVP LDGNKL FNIAQRILDT NSVLLTERGD HIVWINNSWK FNSEEPLITK LILSIRHQLP KEYSSELLCP RKRKTVEANI RDML VDSVE TDTYPDKLPF KNGVLDLVDG MFYSGDDAKK YTCTVSTGFK FDDTKFVEDS PEMEELMNII NDIQPLTDEN KKNRE LYEK TLSSCLCGAT KGCLTFFFGE TATGKSTTKR LLKSAIGDLF VETGQTILTD VLDKGPNPFI ANMHLKRSVF CSELPD FAC SGSKKIRSDN IKKLTEPCVI GRPCFSNKIN NRNHATIIID TNYKPVFDRI DNALMRRIAV VRFRTHFSQP SGREAAE NN DAYDKVKLLD EGLDGKIQNN RYRFAFLYLL VKWYKKYHIP IMKLYPTPEE IPDFAFYLKI GTLLVSSSVK HIPLMTDL S KKGYILYDNV VTLPLTTFQQ KISKYFNSRL FGHDIESFIN RHKKFANVSD EYLQYIFIED ISSP

UniProtKB: Uncoating factor OPG117

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Macromolecule #2: DNA (70-MER)

MacromoleculeName: DNA (70-MER) / type: dna / ID: 2 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: Monkeypox virus
Molecular weightTheoretical: 21.440668 KDa
SequenceString: (DA)(DA)(DC)(DG)(DA)(DG)(DT)(DC)(DA)(DA) (DG)(DC)(DG)(DC)(DA)(DT)(DC)(DC)(DC)(DG) (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT) (DT)(DT)(DT)(DT)(DT)(DT) ...String:
(DA)(DA)(DC)(DG)(DA)(DG)(DT)(DC)(DA)(DA) (DG)(DC)(DG)(DC)(DA)(DT)(DC)(DC)(DC)(DG) (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT) (DT)(DT)(DT)(DT)(DT)(DT)(DT)(DT) (DT)(DT)(DC)(DG)(DG)(DG)(DA)(DT)(DG)(DC) (DG)(DC) (DT)(DT)(DG)(DA)(DC)(DT)(DC) (DG)(DT)(DT)

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Macromolecule #3: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / type: ligand / ID: 3 / Number of copies: 6 / Formula: ANP
Molecular weightTheoretical: 506.196 Da
Chemical component information

ChemComp-ANP:
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER / AMP-PNP, energy-carrying molecule analogue*YM

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 3 / 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

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (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: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.74 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 221856
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
FSC plot (resolution estimation)

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