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- EMDB-31290: Human Cytomegalovirus, the reconstruction of C1 portal vertex in ... -

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Basic information

Entry
Database: EMDB / ID: EMD-31290
TitleHuman Cytomegalovirus, the reconstruction of C1 portal vertex in the enveloped capsid
Map dataunsharpened map
Sample
  • Virus: Human betaherpesvirus 5
Function / homology
Function and homology information


T=16 icosahedral viral capsid / viral genome packaging / viral tegument / viral capsid assembly / viral release from host cell / chromosome organization / viral process / virion component / viral capsid / symbiont-mediated perturbation of host ubiquitin-like protein modification ...T=16 icosahedral viral capsid / viral genome packaging / viral tegument / viral capsid assembly / viral release from host cell / chromosome organization / viral process / virion component / viral capsid / symbiont-mediated perturbation of host ubiquitin-like protein modification / host cell cytoplasm / cysteine-type deubiquitinase activity / host cell nucleus / structural molecule activity / proteolysis / DNA binding
Similarity search - Function
Herpesvirus UL11/UL32 / Herpesvirus large structural phosphoprotein UL32 / Small capsid protein, Herpesviridae / Small capsid protein of Herpesviridae / Large tegument protein deneddylase / Herpesvirus tegument ubiquitin-specific protease (htUSP) domain profile. / Herpesvirus large tegument protein, USP domain / Herpesvirus tegument protein, N-terminal conserved region / Herpesvirus capsid vertex component 1 / Herpesvirus UL17 protein ...Herpesvirus UL11/UL32 / Herpesvirus large structural phosphoprotein UL32 / Small capsid protein, Herpesviridae / Small capsid protein of Herpesviridae / Large tegument protein deneddylase / Herpesvirus tegument ubiquitin-specific protease (htUSP) domain profile. / Herpesvirus large tegument protein, USP domain / Herpesvirus tegument protein, N-terminal conserved region / Herpesvirus capsid vertex component 1 / Herpesvirus UL17 protein / Herpesvirus UL25 / Herpesvirus UL25 family / Herpesvirus capsid shell protein 1 / Herpesvirus capsid shell protein VP19C / Herpesvirus capsid protein 2 / Herpesvirus VP23 like capsid protein / Herpesvirus major capsid protein / Herpesvirus major capsid protein, upper domain superfamily / Herpes virus major capsid protein / Papain-like cysteine peptidase superfamily
Similarity search - Domain/homology
Major capsid protein / UL77 protein / UL48 protein / Capsid vertex component 1 / ORFL92C_UL32 / Small capsomere-interacting protein / Capsid triplex subunit 2 / Capsid triplex subunit 1
Similarity search - Component
Biological speciesHuman betaherpesvirus 5
Methodsingle particle reconstruction / cryo EM / Resolution: 5.5 Å
AuthorsLi Z / Pang J / Dong L / Yu X
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31900869 China
CitationJournal: Nat Commun / Year: 2021
Title: Structural basis for genome packaging, retention, and ejection in human cytomegalovirus.
Authors: Zhihai Li / Jingjing Pang / Lili Dong / Xuekui Yu /
Abstract: How the human cytomegalovirus (HCMV) genome-the largest among human herpesviruses-is packaged, retained, and ejected remains unclear. We present the in situ structures of the symmetry-mismatched ...How the human cytomegalovirus (HCMV) genome-the largest among human herpesviruses-is packaged, retained, and ejected remains unclear. We present the in situ structures of the symmetry-mismatched portal and the capsid vertex-specific components (CVSCs) of HCMV. The 5-fold symmetric 10-helix anchor-uncommon among known portals-contacts the portal-encircling DNA, which is presumed to squeeze the portal as the genome packaging proceeds. We surmise that the 10-helix anchor dampens this action to delay the portal reaching a "head-full" packaging state, thus facilitating the large genome to be packaged. The 6-fold symmetric turret, latched via a coiled coil to a helix from a major capsid protein, supports the portal to retain the packaged genome. CVSCs at the penton vertices-presumed to increase inner capsid pressure-display a low stoichiometry, which would aid genome retention. We also demonstrate that the portal and capsid undergo conformational changes to facilitate genome ejection after viral cell entry.
History
DepositionMay 11, 2021-
Header (metadata) releaseJul 14, 2021-
Map releaseJul 14, 2021-
UpdateAug 18, 2021-
Current statusAug 18, 2021Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.01
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by height
  • Surface level: 0.01
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31290.png

Downloads & links

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Map

FileDownload / File: emd_31290.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationunsharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.63 Å/pix.
x 256 pix.
= 416. Å		1.63 Å/pix.
x 256 pix.
= 416. Å		1.63 Å/pix.
x 256 pix.
= 416. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.625 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01 / Movie #1: 0.01
Minimum - Maximum-0.020595532 - 0.03814831
Average (Standard dev.)0.0038421066 (±0.0074507245)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 416.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.6251.6251.625
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z416.000416.000416.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ500500500
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.0210.0380.004

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Supplemental data

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Additional map: B-factor sharpened map

Fileemd_31290_additional_1.map
AnnotationB-factor sharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Human betaherpesvirus 5

EntireName: Human betaherpesvirus 5
Components
  • Virus: Human betaherpesvirus 5

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Supramolecule #1: Human betaherpesvirus 5

SupramoleculeName: Human betaherpesvirus 5 / type: virus / ID: 1 / Parent: 0 / NCBI-ID: 10359 / Sci species name: Human betaherpesvirus 5 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: No

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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: 7.5
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: 30.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionResolution.type: BY AUTHOR / Resolution: 5.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 22087
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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