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- EMDB-31178: Structure of Lassa virus polymerase in complex with 3'-vRNA and Z... -

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Basic information

Entry
Database: EMDB / ID: EMD-31178
TitleStructure of Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A)
Map dataThe EM map of Lassa L in complex with 3'-vRNA and Z mutant (F36A)
Sample
  • Complex: Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).
    • Complex: Lassa virus Z protein
      • Protein or peptide: RING finger protein Z
    • Complex: 3-'vRNA promoter
      • RNA: 3-'vRNA promoter
    • Complex: Lassa virus polymerase
      • Protein or peptide: RNA-directed RNA polymerase L
  • Ligand: ZINC ION
  • Ligand: MANGANESE (II) ION
KeywordsLassa virus / Polymerase / Z protein / replication regulation / VIRAL PROTEIN-RNA complex
Function / homology
Function and homology information


negative stranded viral RNA replication / viral budding via host ESCRT complex / cap snatching / viral budding from plasma membrane / virion component / host cell cytoplasm / Hydrolases; Acting on ester bonds / host cell perinuclear region of cytoplasm / hydrolase activity / RNA-directed RNA polymerase ...negative stranded viral RNA replication / viral budding via host ESCRT complex / cap snatching / viral budding from plasma membrane / virion component / host cell cytoplasm / Hydrolases; Acting on ester bonds / host cell perinuclear region of cytoplasm / hydrolase activity / RNA-directed RNA polymerase / RNA-dependent RNA polymerase activity / nucleotide binding / host cell plasma membrane / RNA binding / zinc ion binding / membrane / metal ion binding
Similarity search - Function
RING finger protein Z, zinc finger / RING finger protein Z, arenaviridae / Protein Z, RING-type zinc finger superfamily / P-11 zinc finger / RNA polymerase, arenaviral / RNA endonuclease, cap-snatching / Arenavirus RNA polymerase / Arenavirus cap snatching domain / : / RNA-directed RNA polymerase, negative-strand RNA virus / RdRp of negative ssRNA viruses with segmented genomes catalytic domain profile.
Similarity search - Domain/homology
RING finger protein Z / RNA-directed RNA polymerase L
Similarity search - Component
Biological speciesLassa mammarenavirus
Methodsingle particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsXu X / Peng R
Funding support China, 1 items
OrganizationGrant numberCountry
Chinese Academy of SciencesXDB29010000 China
CitationJournal: Nat Microbiol / Year: 2021
Title: Cryo-EM structures of Lassa and Machupo virus polymerases complexed with cognate regulatory Z proteins identify targets for antivirals.
Authors: Xin Xu / Ruchao Peng / Qi Peng / Min Wang / Ying Xu / Sheng Liu / Xiaolin Tian / Haiteng Deng / Yimin Tong / Xiaoyou Hu / Jin Zhong / Peiyi Wang / Jianxun Qi / George F Gao / Yi Shi /
Abstract: Zoonotic arenaviruses can lead to life-threating diseases in humans. These viruses encode a large (L) polymerase that transcribes and replicates the viral genome. At the late stage of replication, ...Zoonotic arenaviruses can lead to life-threating diseases in humans. These viruses encode a large (L) polymerase that transcribes and replicates the viral genome. At the late stage of replication, the multifunctional Z protein interacts with the L polymerase to shut down RNA synthesis and initiate virion assembly. However, the mechanism by which the Z protein regulates the activity of L polymerase is unclear. Here, we used cryo-electron microscopy to resolve the structures of both Lassa and Machupo virus L polymerases in complex with their cognate Z proteins, and viral RNA, to 3.1-3.9 Å resolutions. These structures reveal that Z protein binding induces conformational changes in two catalytic motifs of the L polymerase, and restrains their conformational dynamics to inhibit RNA synthesis, which is supported by hydrogen-deuterium exchange mass spectrometry analysis. Importantly, we show, by in vitro polymerase reactions, that Z proteins of Lassa and Machupo viruses can cross-inhibit their L polymerases, albeit with decreased inhibition efficiencies. This cross-reactivity results from a highly conserved determinant motif at the contacting interface, but is affected by other variable auxiliary motifs due to the divergent evolution of Old World and New World arenaviruses. These findings could provide promising targets for developing broad-spectrum antiviral drugs.
History
DepositionApr 9, 2021-
Header (metadata) releaseMay 5, 2021-
Map releaseMay 5, 2021-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing 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
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  • Surface view colored by radius
  • Surface level: 0.01
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7ela
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_31178.png

Downloads & links

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Map

FileDownload / File: emd_31178.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationThe EM map of Lassa L in complex with 3'-vRNA and Z mutant (F36A)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1 Å/pix.
x 256 pix.
= 256. Å		1 Å/pix.
x 256 pix.
= 256. Å		1 Å/pix.
x 256 pix.
= 256. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01 / Movie #1: 0.01
Minimum - Maximum-0.0762236 - 0.13787362
Average (Standard dev.)0.00010793935 (±0.0027006099)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 256.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z111
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z256.000256.000256.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.0760.1380.000

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Supplemental data

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Sample components

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Entire : Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).

EntireName: Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).
Components
  • Complex: Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).
    • Complex: Lassa virus Z protein
      • Protein or peptide: RING finger protein Z
    • Complex: 3-'vRNA promoter
      • RNA: 3-'vRNA promoter
    • Complex: Lassa virus polymerase
      • Protein or peptide: RNA-directed RNA polymerase L
  • Ligand: ZINC ION
  • Ligand: MANGANESE (II) ION

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Supramolecule #1: Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).

SupramoleculeName: Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A).
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Lassa mammarenavirus
Molecular weightTheoretical: 270 KDa

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Supramolecule #2: Lassa virus Z protein

SupramoleculeName: Lassa virus Z protein / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1

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Supramolecule #3: 3-'vRNA promoter

SupramoleculeName: 3-'vRNA promoter / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Lassa mammarenavirus / Synthetically produced: Yes

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Supramolecule #4: Lassa virus polymerase

SupramoleculeName: Lassa virus polymerase / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3

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Macromolecule #1: RING finger protein Z

MacromoleculeName: RING finger protein Z / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lassa mammarenavirus
Molecular weightTheoretical: 10.665365 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MGNKQVKAPE ARNSPRASLI PDATHLGPQF CKSCWAENKG LVECNNHYLC LNCLTLLLGV SSRCPICKMP LPTRLRPSAA PTAPPAEAG DNTRPPPYSP

UniProtKB: RING finger protein Z

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Macromolecule #3: RNA-directed RNA polymerase L

MacromoleculeName: RNA-directed RNA polymerase L / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: RNA-directed RNA polymerase
Source (natural)Organism: Lassa mammarenavirus
Molecular weightTheoretical: 253.505828 KDa
Recombinant expressionOrganism: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
SequenceString: MEEDIACVKD LVSKYLANNE RLSRQKLAFL VQTEPRMLLM EGLKLLSLCI EVDSCNANGC EHNSEDKSVE RILHDHGVLT PSLCFVVPD GYKLTGNVLI LLECFVRSSP ANFEQKYVED FKKLEQLKED LKSVDINLIP LIDGRTSFYN EQIPDWVNDK L RDTLFSLL ...String:
MEEDIACVKD LVSKYLANNE RLSRQKLAFL VQTEPRMLLM EGLKLLSLCI EVDSCNANGC EHNSEDKSVE RILHDHGVLT PSLCFVVPD GYKLTGNVLI LLECFVRSSP ANFEQKYVED FKKLEQLKED LKSVDINLIP LIDGRTSFYN EQIPDWVNDK L RDTLFSLL KYAQESNSLF EESEYSRLCE SLSMTSGRLS GVESLNALLD NRSNHYEEVI ASCHQGINNK LTAHEVKLQI EE EYQVFRN RLRKGEIEGQ FLKVEKNQLL NEFNNLYADK VAEKDSVEHL THQFKRASPI LRFLYANISK GDNGEGNLII GEC QMQCWR SFLNKVKSMR ILNTRRKLLL IFDALILLAS KHDQVRKKPL RGWLGTCFVS VNDRLVSLES TKKDLKKWVE RRQQ VERSR TMQSFQCPSK NQILNSIFQK TISKATTALR DVGISVDHYK IDMEVICPDG YDLIMDFDVS GVTPTISYQR SEEEA FPYI MGDVDLLKTT DLERLSSLSL ALVNSMKTSS TVKLRQNEFG PARYQVVKCK EAYCQEFSLG ETEFQLIYQK TGECSK CYA INDNRVGEVC SFYADPKRYF PAIFSAEVLQ TTVSTMISWI EDCNELEEQL DKIRSLTKMI LILILAHPSK RSQKLLQ NL RYFIMAYVSD YYHKDLIDKV REELITDVEF LLYRLLRTLM GLVLSEDVKS MMTNRFKFIL NISYMCHFIT KETPDRLT D QIKCFEKFLE PKVKFGHVSI NPADTATEEE LDDMVYNAKK FLSKGGCTSA KGPSYKKPGV SKKYLSLLTS SFNNGSLFK EREVKKEIKD PLITSGCATA LDLASNKSVV VNKYTDGSRV LNYDFNKLTA LAVSQLTEVF SRKGKHLLNK QDYEYKVQQA MSNLVLGSK QHKGDADEAD LDEILLDGGA STYFNQLKET VEKIVDQYRE PVKMGSGSND GDQPSINDLD EIVSNKFYIR L IKGELSNH MVEDFDHDVL PDKFYEEFCD AVYENSKLKE KYFYCGHMSQ CPIGELTKAV STRTYLDHEY FQCFKSILLI MN ANALMGK YTHYKSRNLN FKFDMGKLSD DARISERESN SEALSKALSL TNCTTAMLKN LCFYSQESPQ SYNSVGPDTG RLK FSLSYK EQVGGNRELY IGDLRTKMFT RLIEDYFEAL SSQLSGSCLN NEKEFENAIL SMKLNVSMAH VSYSMDHSKW GPMM CPFLF LTVLQNLIFL SKDLQADIKG RDYLSTLLMW HMHKMVEIPF NVVSAMMKSF IKAQLGLRKK TKQSITEDFF YSNFQ IGVV PSHISSILDM GQGILHNTSD FYALITERFI NYAISCVCGG TIDAYTSSDD QISLFDQTLT ELLHRDPEEF RALMEF HYY MSDQLNKFVS PKSVIGRFVA EFKSRFFVWG DEVPLLTKFV AAALHNIKCK EPHQLAETID TIVDQSVANG VPVHLCN LI QIRTLSLLQY ARYPIDPFLL NCETDVRDWV DGNRSYRIMR QIEGLIPDAC SKIRSMLRRL YNRLKTGQLH EEFTTNYL S SEHLSSLKNL CELLGVEPPS ESDLEYSWLN LAAHHPLRMV LRQKIIYSGA VNLDDEKIPT IVKTIQNKLS STFTRGAQK LLSEAINKSA FQSSIASGFV GLCRTLGSKC VRGPNKENLY IKSIQSLITG TQGIELLTNS IGVQYWRVPL GLRNKSESVV SYFRPLLWD YMCISLSTAI ELGAWVLGDP KTTKALDFFK HNPCDYFPLK PTASKLLEDR VGLNHIIHSL RRLYPSVFEK H ILPFMSDL ASTKMKWSPR IKFLDLCVAL DVNCEALSLV SHIVKWKREE HYIVLSSELR FSHTRTHEPM VEERVVSTSD AV DNFMRQI YFESYVRPFV ATTRTLGSFT WFPHRTSIPE GEGLHRLGPF SSFVEKVIHK GVERPMFKHD LMMGYAWIDF DIE PARFNQ NQLIASGLVD SKFDSLEDFF DAVASLPTGS AKLSQTVRFR IKSQDASFRE SFAIHLDYIG SMNQQAKYLV HDVT AMYSG AVSPCVLSDC WRLVLSGPTF KGKPVWYVDT EVINEFLVDT NQLGHVTPVE VVVDMEKLQF AEYDFMLVGP CAEPV PLVV RRGGLWECEK KLASFTPVIQ DQDLEMFVRE VGDTSSDLLI RALSDMITDR LGLRMQWSGV DIVSTLRAAA PGNAEV LSA VLEVVDNWVE FKGYALCYSK SRGRVMVQSS SGKLRLKGRT CEELTEGGEH VEDIE

UniProtKB: RNA-directed RNA polymerase L

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Macromolecule #2: 3-'vRNA promoter

MacromoleculeName: 3-'vRNA promoter / type: rna / ID: 2 / Number of copies: 1
Source (natural)Organism: Lassa mammarenavirus
Molecular weightTheoretical: 6.069649 KDa
SequenceString:
GCCUAGGAUC CACUGUGCG

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Macromolecule #4: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 4 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #5: MANGANESE (II) ION

MacromoleculeName: MANGANESE (II) ION / type: ligand / ID: 5 / Number of copies: 1 / Formula: MN
Molecular weightTheoretical: 54.938 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

Concentration1 mg/mL
BufferpH: 7.5
GridModel: Quantifoil R1.2/1.3 / Material: NICKEL/TITANIUM / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY
Details: The film was designed with regular 1.2/1.3 micron holey partterns, similar to the Quantifoil 1.2/1.3 holey grids.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Frames/image: 3-18 / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 2032000
Startup modelType of model: EMDB MAP
EMDB ID:

0706

Final reconstructionAlgorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 127868
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final 3D classificationSoftware - Name: RELION (ver. 3.0)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

6klc

source_name: PDB, initial_model_type: experimental model

5i72

source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Target criteria: Correlation coefficient
Output model

PDB-7ela:
Structure of Lassa virus polymerase in complex with 3'-vRNA and Z mutant (F36A)

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