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- EMDB-14566: Leishmania RNA virus 1 virion -

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Basic information

Entry
Database: EMDB / ID: EMD-14566
TitleLeishmania RNA virus 1 virion
Map dataVirion structure
Sample
  • Virus: Leishmania RNA virus 1 - 4
    • Protein or peptide: Capsid protein,Major capsid protein
Keywordsvirion / full particle / VIRUS
Function / homologyTotivirus coat / Totivirus coat protein / Capsid protein
Function and homology information
Biological speciesLeishmania RNA virus 1 - 4
Methodsingle particle reconstruction / cryo EM / Resolution: 3.88 Å
AuthorsProchazkova M / Plevka P
Funding support Czech Republic, 1 items
OrganizationGrant numberCountry
Grant Agency of the Czech Republic20-22689S Czech Republic
Citation
Journal: Virology / Year: 2022
Title: Virion structure of Leishmania RNA virus 1.
Authors: Michaela Procházková / Tibor Füzik / Danyil Grybchuk / Vyacheslav Yurchenko / Pavel Plevka /
Abstract: The presence of Leishmania RNA virus 1 (LRV1) enables Leishmania protozoan parasites to cause more severe disease than the virus-free strains. The structure of LRV1 virus-like particles has been ...The presence of Leishmania RNA virus 1 (LRV1) enables Leishmania protozoan parasites to cause more severe disease than the virus-free strains. The structure of LRV1 virus-like particles has been determined previously, however, the structure of the LRV1 virion has not been characterized. Here we used cryo-electron microscopy and single-particle reconstruction to determine the structures of the LRV1 virion and empty particle isolated from Leishmania guyanensis to resolutions of 4.0 Å and 3.6 Å, respectively. The capsid of LRV1 is built from sixty dimers of capsid proteins organized with icosahedral symmetry. RNA genomes of totiviruses are replicated inside the virions by RNA polymerases expressed as C-terminal extensions of a sub-population of capsid proteins. Most of the virions probably contain one or two copies of the RNA polymerase, however, the location of the polymerase domains in LRV1 capsid could not be identified, indicating that it varies among particles. Importance. Every year over 200 000 people contract leishmaniasis and more than five hundred people die of the disease. The mucocutaneous form of leishmaniasis produces lesions that can destroy the mucous membranes of the nose, mouth, and throat. Leishmania parasites carrying Leishmania RNA virus 1 (LRV1) are predisposed to cause aggravated symptoms in the mucocutaneous form of leishmaniasis. Here, we present the structure of the LRV1 virion determined using cryo-electron microscopy.
#1: Journal: J Virol / Year: 2021
Title: Capsid Structure of Leishmania RNA virus 1
Authors: Prochazkova M / Fuzik T / Grybchuk D / Falginella FL / Podesvova L / Yurchenko V / Vacha R / Plevka P
History
DepositionMar 19, 2022-
Header (metadata) releaseNov 23, 2022-
Map releaseNov 23, 2022-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_14566.png

Downloads & links

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Map

FileDownload / File: emd_14566.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationVirion structure
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 512 pix.
= 544.256 Å		1.06 Å/pix.
x 512 pix.
= 544.256 Å		1.06 Å/pix.
x 512 pix.
= 544.256 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.063 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.022
Minimum - Maximum-0.04402762 - 0.086731136
Average (Standard dev.)0.0014288063 (±0.006217532)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin-256-256-256
Dimensions512512512
Spacing512512512
CellA=B=C: 544.256 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_14566_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_14566_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : Leishmania RNA virus 1 - 4

EntireName: Leishmania RNA virus 1 - 4
Components
  • Virus: Leishmania RNA virus 1 - 4
    • Protein or peptide: Capsid protein,Major capsid protein

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Supramolecule #1: Leishmania RNA virus 1 - 4

SupramoleculeName: Leishmania RNA virus 1 - 4 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 12530 / Sci species name: Leishmania RNA virus 1 - 4 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No
Host (natural)Organism: Leishmania guyanensis (eukaryote) / Strain: MHOM/BR/75/M4147
Molecular weightTheoretical: 9.72 MDa
Virus shellShell ID: 1 / Name: capsid / Diameter: 420.0 Å / T number (triangulation number): 2

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Macromolecule #1: Capsid protein,Major capsid protein

MacromoleculeName: Capsid protein,Major capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Leishmania RNA virus 1 - 4
Molecular weightTheoretical: 86.431742 KDa
SequenceString: MADIPNSDKI ACGRKPMFCE IIKLANRKRL IFNTTDERVY DARLNYCSTA DSTVQADCHI YWRLKLRRTD AVFEEYTGQG YSLDTAAYP QQYTDIIRGY YSKHVSSSLA ANTQHFVNVL AMLRHAGACI AHYCMTGKID FDILSKKKHK NKEVVTLSNA D SLSFLPHS ...String:
MADIPNSDKI ACGRKPMFCE IIKLANRKRL IFNTTDERVY DARLNYCSTA DSTVQADCHI YWRLKLRRTD AVFEEYTGQG YSLDTAAYP QQYTDIIRGY YSKHVSSSLA ANTQHFVNVL AMLRHAGACI AHYCMTGKID FDILSKKKHK NKEVVTLSNA D SLSFLPHS ALYLPSPLRA SDPEIFNMLY LLGCACDASI AMDNISNTSG AAKYSMPHYN PLQLSHALHV TIFYMLSLMD SC GYGDDAV LALTSGLHSV TTVIAHSDEG GITRDALREL SYTQPYGTMP VPIAGYFQHI NVLFTTQPAW DQFAGIWDYV ILA TAALVH LSDPGMTVND VTYPTTLTTK VATVDGRNSD LAAQMMHSAT RFCDIFVENL STFWGVVANP DGNASQALLH AFNI VACAV EPNRHLEMNV MAPWYWVESS ALFCDYAPFR SPISSAGYGP QCVYGARLVL AATNSLEFTG EAGDYSAYRF EWTTM RHNP LFNILNKRVG DGLANVDFRL RPFNEWLLEG QPSRRSCNSA GHGTPTATCS HKTPNHDTLD EYIWGSTSCD LFHPAE LTS YTAVCVRFRN YLSGADGDVR ILNTPTREVI EGNVVTRCDG IRCLDSNKRI QHVPEVARRY CMMARYLAQA RTFGALT IG DDIIRGFDKV EKIVKMHKSN NRLDQMPLID VTGLCQPMIE TSTVRASTTT RIDPNKLAAA TARVELPLAP RCTSSLIP S SDTVPEPEPQ VGEPGDNGGC APDLGTGGGS GIEGRGSMDI GDPNSVQALA RLQASSVDKL AAALE

UniProtKB: Capsid protein

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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: 7.4
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 4542 / Average electron dose: 1.98 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 7284
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6y83


Details: mainly the matching map EMDB - 10722
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.88 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Software - details: gpu / Number images used: 1156
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING
Final 3D classificationNumber classes: 3
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7sn2


Chain - Chain ID: A / Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: RIGID BODY FIT / Overall B value: 75 / Target criteria: correlation coefficient
Output model

PDB-7z90:
Leishmania RNA virus 1 virion

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