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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-0707 | |||||||||
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Title | Structure of apo Machupo virus polymerase | |||||||||
![]() | apo Machupo virus polymerase | |||||||||
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Function / homology | ![]() negative stranded viral RNA replication / cap snatching / virion component / host cell cytoplasm / Hydrolases; Acting on ester bonds / hydrolase activity / RNA-directed RNA polymerase / RNA-dependent RNA polymerase activity / nucleotide binding / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.58 Å | |||||||||
![]() | Peng R / Xu X / Jing J / Peng Q / Gao GF / Shi Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural insight into arenavirus replication machinery. Authors: Ruchao Peng / Xin Xu / Jiamei Jing / Min Wang / Qi Peng / Sheng Liu / Ying Wu / Xichen Bao / Peiyi Wang / Jianxun Qi / George F Gao / Yi Shi / ![]() Abstract: Arenaviruses can cause severe haemorrhagic fever and neurological diseases in humans and other animals, exemplified by Lassa mammarenavirus, Machupo mammarenavirus and lymphocytic choriomeningitis ...Arenaviruses can cause severe haemorrhagic fever and neurological diseases in humans and other animals, exemplified by Lassa mammarenavirus, Machupo mammarenavirus and lymphocytic choriomeningitis virus, posing great threats to public health. These viruses encode a large multi-domain RNA-dependent RNA polymerase for transcription and replication of the viral genome. Viral polymerases are one of the leading antiviral therapeutic targets. However, the structure of arenavirus polymerase is not yet known. Here we report the near-atomic resolution structures of Lassa and Machupo virus polymerases in both apo and promoter-bound forms. These structures display a similar overall architecture to influenza virus and bunyavirus polymerases but possess unique local features, including an arenavirus-specific insertion domain that regulates the polymerase activity. Notably, the ordered active site of arenavirus polymerase is inherently switched on, without the requirement for allosteric activation by 5'-viral RNA, which is a necessity for both influenza virus and bunyavirus polymerases. Moreover, dimerization could facilitate the polymerase activity. These findings advance our understanding of the mechanism of arenavirus replication and provide an important basis for developing antiviral therapeutics. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 2.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 16.2 KB 16.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 7.1 KB | Display | ![]() |
Images | ![]() | 82.8 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6kldMC ![]() 0706C ![]() 0708C ![]() 0709C ![]() 0710C ![]() 6klcC ![]() 6kleC ![]() 6klhC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | apo Machupo virus polymerase | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.36 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Machupo virus polymerase
Entire | Name: Machupo virus polymerase |
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Components |
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-Supramolecule #1: Machupo virus polymerase
Supramolecule | Name: Machupo virus polymerase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() Recombinant cell: HiFive |
Molecular weight | Experimental: 250 KDa |
-Macromolecule #1: RNA-directed RNA polymerase L
Macromolecule | Name: RNA-directed RNA polymerase L / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: RNA-directed RNA polymerase |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 250.416062 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MDEYVQELKG LIRKHIPERC EFGHQKVTFL SQVHPSPLLT EGFKLLSSLV ELESCEAHAC QANTDQRFVD VILSDNGILC PTLPKVIPD GFKLTGKTLI LLETFVRVNP DEFEKKWKAD MSKLLNLKHD LQKSGVTLVP IVDGRSNYNN RFVADWVIER I RWLLIEIL ...String: MDEYVQELKG LIRKHIPERC EFGHQKVTFL SQVHPSPLLT EGFKLLSSLV ELESCEAHAC QANTDQRFVD VILSDNGILC PTLPKVIPD GFKLTGKTLI LLETFVRVNP DEFEKKWKAD MSKLLNLKHD LQKSGVTLVP IVDGRSNYNN RFVADWVIER I RWLLIEIL KASKSMLEID IEDQEYQRLI HSLSNVKNQS LGLENLEHLK RNSLDYDERL NESLFIGLKG DIRESTVREE LI KLKLWFK DEVFSKGLGK FKLTDRRELL ESLSSLGAHL DSDVSSCPFC NNKLMEIVYN VTFSCVERTD GVATVDQQFS TTH SNIEKH YLSVLSLCNK IKGLKVFNTR RNTLLFLDLI MVNLMVDISD SCQDAIESLR KSGLIVGQMV MLVNDRVLDI LEAV KLIRK KIGTNPNWVK NCSKILERSH PEIWHHLSTL IKQPDFNSLI SIAQHLVSDR PIMRYSVERG SDKICRHKLF QEMSS FEQM RLFKTLSSIS LSLINSMKTS FSSRLLVNER EFSKYFGNVR LRECYAQRFY LAESLVGFLF YQKTGERSRC YSVYLS DNG VMSEQGSFYC DPKRFFLPVF SDEVLAGMCE EMTSWLDFDT GLMNDTGPIL RLLVLAILCS PSKRNQTFLQ GLRYFLM AF ANQIHHIDLT SKLVVECKSS SEVVVQRLAV GLFIRLLSGE SDASLFFSRR FKYLLNVSYL CHLITKETPD RLTDQIKC F EKFIEPKVKF GCAVVNPSLN GKLTVDQEDI MINGLKKFFS KSLRDTEDVQ TPGVCKELLN YCVSLFNRGK LKVSGELKN NPFRPNITST ALDLSSNKSV VIPKLDELGN ILSTYDKEKL VSACVSSMAE RFKTKGRYNL DPDSTDYLIL KNLTGLVSAG PKAKSTQEE LSLMYEALTE EQVESFNEIK HDVQVALAKM ADNSVNTRTK NLGRADNSVK NGNNPLDNLW SPFGVMKEIR A EVSLHEVK DFDPDVLPPE VYKELCDAVY KSSEKCNFFL EGVLDVCPLG LLLKNLTTSS YVDEEYFMCF KYLLIQGHFD QK LGSYEHK SRSRLGFTDE TLRLKDEVRL SIRESNSEAI ADKLDKSYFT NAALRNLCFY SEDSPTEFTS ISSNSGNLKF GLS YKEQVG SNRELYVGDL NTKLMTRLVE DFSEAVGNSM KYTCLNSEKE FERAICDMKM AVNNGDLSCS YDHSKWGPTM SPAL FLALL QMLELRTPVD RSKIDLDSVK SILKWHLHKV VEVPINVAEA YCIGKLKRSL GLMGCGSTSL SEEFFHQTMQ LNGQI PSHI MSVLDMGQGI LHNTSDLYGL ITEQFLCYAL DLLYDVIPVS YTSSDDQITL IKTPSLDIEG GSDAAEWLEM ICFHEF LSS KLNKFVSPKS VIGTFVAEFK SRFFVMGEET PLLTKFVAAA LHNVKCKTPT QLSETIDTIC DQCIANGVST KIVTRIS KR VNQLIRYSGY GETPFGAIED QDVKDWVDGS RGYRLQRKIE AIFHDDKETS FIRNCARKVF NDIKRGRIFE ENLINLIG R GGDEALTGFL QYAGCSEQEV NRVLNYRWVN LSSFGDLRLV LRTKLMTSRR VLEREEVPTL IKTLQSKLSR NFTKGVKKI LAESINKSAF QSSVASGFIG FCKSMGSKCV RDGKGGFLYI KEVYSGVSAC TCEICALKPK IIYCNNSLNK VSQFSKPILW DYFSLVLTN ACELGEWVFS TVKEPQKPLV LNNQNFFWAV KPKVVRQIED QLGMNHVLQS IRRNYPVLFD EHLTPFMNDL Q VSRTMDSG RLKFLDVCIA LDMMNENLGI ISHLLKTRDN SVYIVKQSDC ALAHIRQSSY TDWELGLSPQ QICTNFKTQL VL SSMVNPL VLSTSCLKSF FWFNEVLELE DDSQIELAEL TDFALMVKNQ NVSRAMFVED IAMGYVVSNF EGVRISLSNV MVD GVQLPP QEKAPDIGEL FGLKAENVIV GLVVQIDHVR MSTKFKLKRK MVYSFSLECI MDVGEIQNKE VILKVVAVDQ SVSG SGGNH MLLDGVSVVA SLPLFTGQAS FDLAAMLIES NLAGSNDNFL MRNVTLDLGG FSPELSDKYS YRLSGPENQE DPLVL KDGA FYVGGERLST YKVEFTGDLV VKALGALEDD ESVVSMLHQL WPYLKATSQV ILFQQEDFTI VHDLYKKQLT KSIESF GEW IEFTNFKVAY SKSLKELVIS DTQGSFRLKG VMCRPLASTP QVEDIE |
-Macromolecule #2: MANGANESE (II) ION
Macromolecule | Name: MANGANESE (II) ION / type: ligand / ID: 2 / Number of copies: 1 / Formula: MN |
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Molecular weight | Theoretical: 54.938 Da |
-Macromolecule #3: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 3 / Number of copies: 1 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 1.0 mg/mL |
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Buffer | pH: 8 |
Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 60.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
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
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL / Target criteria: Correlation coefficient |
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Output model | ![]() PDB-6kld: |