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Open data
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Basic information
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Title | Cryo-EM Structure of D5 ADP form | |||||||||
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![]() | MPVX / VIRAL PROTEIN | |||||||||
Function / homology | DNA 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![]() | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||
![]() | Li YN / Zhu J / Guo YY / Yan RH | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insight into the assembly and working mechanism of helicase-primase D5 from Mpox virus. Authors: Yaning Li / Jing Zhu / Yingying Guo / Renhong Yan / ![]() Abstract: The Mpox pandemic, caused by the Mpox virus (or monkeypox virus, MPXV), has gained global attention. The D5 protein, a putative helicase-primase found in MPXV, plays a vital role in viral replication ...The Mpox pandemic, caused by the Mpox virus (or monkeypox virus, MPXV), has gained global attention. The D5 protein, a putative helicase-primase found in MPXV, plays a vital role in viral replication and genome uncoating. Here we determined multiple cryo-EM structures of full-length hexameric D5 in diverse states. These states were captured during ATP hydrolysis while moving along the single-stranded DNA (ssDNA) track. Through comprehensive structural analysis combined with the helicase activity system, we revealed that when the primase domain is truncated or the interaction between the primase and helicase domains is disrupted, the double-stranded DNA (dsDNA) unwinds into ssDNA, suggesting a critical regulatory role of the primase domain. Two transition states bound with ssDNA substrate during unwinding reveals that two ATP molecules were consumed to drive DNA moving forward two nucleotides. Collectively, our findings shed light on the molecular mechanism that links ATP hydrolysis to the DNA unwinding in poxviruses. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 59.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.2 KB 14.2 KB | Display Display | ![]() |
Images | ![]() | 47.8 KB | ||
Filedesc metadata | ![]() | 5.9 KB | ||
Others | ![]() ![]() | 59.2 MB 59.2 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8hwdMC ![]() 8hwaC ![]() 8hwbC ![]() 8hwcC ![]() 8hweC ![]() 8hwfC ![]() 8hwgC ![]() 8hwhC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.072 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_35054_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_35054_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : D5 ADP form
Entire | Name: D5 ADP form |
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Components |
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-Supramolecule #1: D5 ADP form
Supramolecule | Name: D5 ADP form / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Primase D5
Macromolecule | Name: Primase D5 / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 90.476344 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: 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 |
-Macromolecule #2: ADENOSINE-5'-DIPHOSPHATE
Macromolecule | Name: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 2 / Number of copies: 6 / Formula: ADP |
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Molecular weight | Theoretical: 427.201 Da |
Chemical component information | ![]() ChemComp-ADP: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0.6) / Number images used: 621428 |
Initial angle assignment | Type: ANGULAR RECONSTITUTION |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |