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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-31163 | |||||||||
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Title | Junin virus(JUNV) RNA polymerase L complexed with Z protein | |||||||||
![]() | cryo-EM map for Junin virus L and Z protein complex | |||||||||
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Function / homology | ![]() virion component => GO:0044423 / negative stranded viral RNA replication / viral budding via host ESCRT complex / cap snatching / viral budding from plasma membrane / host cell cytoplasm / Hydrolases; Acting on ester bonds / host cell perinuclear region of cytoplasm / hydrolase activity / RNA-directed RNA polymerase ...virion component => GO:0044423 / negative stranded viral RNA replication / viral budding via host ESCRT complex / cap snatching / viral budding from plasma membrane / 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 Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
![]() | Chen Y | |||||||||
![]() | ![]() Title: Structural basis for recognition and regulation of arenavirus polymerase L by Z protein. Authors: Huiling Kang / Jingyuan Cong / Chenlong Wang / Wenxin Ji / Yuhui Xin / Ying Qian / Xuemei Li / Yutao Chen / Zihe Rao / ![]() Abstract: Junin virus (JUNV) causes Argentine hemorrhagic fever, a debilitating human disease of high mortality rates and a great risk to public health worldwide. Studying the L protein that replicates and ...Junin virus (JUNV) causes Argentine hemorrhagic fever, a debilitating human disease of high mortality rates and a great risk to public health worldwide. Studying the L protein that replicates and transcribes the genome of JUNV, and its regulator Z protein should provide critical clues to identify therapeutic targets for disrupting the life cycle of JUNV. Here we report the 3.54 Å cryo-EM structure of the JUNV L protein complexed with regulator Z protein. JUNV L structure reveals a conserved architecture containing signature motifs found in other L proteins. Structural analysis shows that L protein is regulated by binding of Z protein at the RNA product exit site. Based on these findings, we propose a model for the role of Z protein as a switch to turn on/off the viral RNA synthesis via its interaction with L protein. Our work unveils the mechanism of JUNV transcription, replication and regulation, which provides a framework for the rational design of antivirals for combating viral infections. | |||||||||
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 | ![]() | 59.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.2 KB 15.2 KB | Display Display | ![]() |
Images | ![]() | 171.9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 454.9 KB | Display | ![]() |
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Full document | ![]() | 454.5 KB | Display | |
Data in XML | ![]() | 5.9 KB | Display | |
Data in CIF | ![]() | 6.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7ejuMC 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 | cryo-EM map for Junin virus L and Z protein complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 0.65 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 : Complex of L and Z proteins of Junin virus (JUNV)
Entire | Name: Complex of L and Z proteins of Junin virus (JUNV) |
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Components |
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-Supramolecule #1: Complex of L and Z proteins of Junin virus (JUNV)
Supramolecule | Name: Complex of L and Z proteins of Junin virus (JUNV) / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 Details: The RNA polymerase L protein complexed with a zinc-binding Z protein |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() |
Molecular weight | Theoretical: 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: 253.499484 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MEESVNEIKT LIRKHFPERQ ELAYQRDIFL SQHHPSSLLL EGFKLLSSLV ELESCEAHAC QINSDQKFVD VILSDHGILC PTLPKVIPD GFKLTGKTLI LLETFVRVNP DEFERKWKSD MSKLLNLKSD LLRVGITLVP VVDGRSSYSN RFLADWVVER V RWLLIDIL ...String: MEESVNEIKT LIRKHFPERQ ELAYQRDIFL SQHHPSSLLL EGFKLLSSLV ELESCEAHAC QINSDQKFVD VILSDHGILC PTLPKVIPD GFKLTGKTLI LLETFVRVNP DEFERKWKSD MSKLLNLKSD LLRVGITLVP VVDGRSSYSN RFLADWVVER V RWLLIDIL KKSKFMQEIN IEEQEYQRLI HSLSNTKNQS LGLENIECLK KNSLGYDERL NESLFVGVRG DIRESVIREE LI KLRFWFK KEIFDKQLGK FKFSQKSNLI NDLILLGSHK DSDVPSCPFC ANKLMDVVYS IALHPIDEVN MERQSDENST SID AVERCY LQALSVCNKV KGLKVFNTRR NTLLFLDLVL LNLLCDLFKT YDGAIVRLRN AGIVVGQMLM LVNDRLLDIL EAIK LIRKK LMTSPKWVQM CSRTLKNSHQ DLWLQLEKLI KHPDMDNLMI LAQVLVSDRP VMRYTIDREF EKICRHQPFS SLVEG EQKK LFRILSSISL ALVNSMKTSF SSRLLINERE YSRYFGNVRL RECYVQRFHL TKNTFGLLFY QKTGEKSRCY SIYLST NGV LEEQGSFYCD PKRFFLPIFS EDVLIEMCEE MTSWLDFSHE LMTMTRPILR LLVLAVLCSP SKRNQTFLQG LRYFLMA YA NQIHHVDLMS KLRVDCMSGS EVLIQRMAVE LFQIILSEGE DADLYFARRF KYLLNVSYLC HLVTKETPDR LTDQIKCF E KFVEPKVKFG CVVVNPPLNG SLTLEQEDTM IRGLDRFFSK EAKTSSDTQI PGVCKEILSF CISLFNRGRL KVTGELKSN PYRPNITSTA LDLSSNKSVV IPKLDELGNI LSVYDKEKLV STCVSTMAER FKTKGRYNLD PDSMDYLILK NLTGLVSTGS RTRTNQEEL SVMYESLTED QVRAFEGIRN DVQMTLAKMA NSEGSKVETS KLKSKNLSVD ERESLELLWA PFGVMREIKA E VSMHEVKD FDPDVFRSDV YKELCDTVYL SPYKLTYFLE APQDICPLGL LLKNLTTIAY QEEEFFECFK YLLIQGHYDQ KL GSYEHRS RSRLGFSSEV LKLKDEVRLS TRESNSEAIA DKLDKSYFTN AALRNLCFYS DDSPTEFTSI SSNTGNLKFG LSY KEQVGS NRELYVGDLN TKLMTRLVED FSEAVGSSMR YTCLNSEKEF ERAICDMKMA VNNGDLSCSY DHSKWGPTMS PALF LSFLH TLELKNPRDR TKVNLEPVMN ILKWHLHKVV EVPINVAEAY CVGKLKRSLG LMGCDCTSVG EEFFHQYLQS RDQVP SHIM SVLDMGQGIL HNTSDLYGLI TEQFLCYALD LLYDVIPVTY TSSDDQVSLI KIPCLSDEKC QDRTELLEMV CFHEFL SSK LNKFISPKSV IGTFVAEFKS RFFVMGEETP LLTKFVSAAL HNVKCKTPTQ LSETIDTICD QCIANGVSTH IVSKISI RV NQLIRYSGYR ETPFGAIEEQ DVKDWVDGSR GYRLQRKIEA IFSDDKETMF IRNCARKVFN DIKRGKIFEE NLINLISR G GDEALSGFLQ YAGCSEDEIR QTLDYRWVNL ASFGDLRLVL RTKLMTSRRV LEKEEMPTLI KTIQSRLSRN FTKGVKKIL AESINKSAFQ SSVASGFIGF CKSMGSKCVR DGKGGFLYIK DIFTRIIPCL CGICERKPKV IYCQKSLQEV NQFSKPILWD YFSLVLTNA CELGEWVFSA VKSPQAPLVL CNKNFFWAVK PKAVRQIEDQ LGMNHVLHSI RRNYPKLFEE HLAPFMNDLQ V NRSLDSGR LKFLDVCVAL DMMNENLGII SHLLKVRDNN VYIVKQSDCA SAHVRQSEYT NWEVGISPQQ VCRNFMVQVV LS SMINPLV MSTSCLKSFF WFNEVLDLED DSQVDLAELT DFTLSIKNNK VSRAMFVEDI AMGYVVSSFD NIKVFLESVS VDN ISLLPQ EDMMDLHTVL RNVACQEAVK LKLIIQVEHT RVSTKFKLRR KMVYSYTIVS SLRVDDVSTP ELELNVDTMS QCVS GSEGN HSLLDGALVI ASLPLFTGHE SFDLAGLFID AGYALTNDDN ILGHVKFNFG DFYSEISNKY AYDLIGPDNL GEPLV LKEG VFYRGNERLS TYRVELSGDV IVKAIGALED IDSVETLLSQ LWPYLKMTSQ TILFQQEDFV LIYDLHKEQL IRSLDK FGD WLEFSNFKVA FSRSLNDLLI SDPQGQFRLK GVTCRPLKHK VEIKDID |
-Macromolecule #2: RING finger protein Z
Macromolecule | Name: RING finger protein Z / type: protein_or_peptide / ID: 2 Details: matrix zinc binding protein of JUNV, which inactivates JUNV RNA polymerase Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 10.542071 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MGNCNGASKS NQPDSSRVTQ PAAEFRRVAH SSLYGRYNCK CCWFADTNLI TCNDHYLCLR CHQVMLRNSD LCNICWKPLP TTITVPVEP TAPPP |
-Macromolecule #3: ZINC ION
Macromolecule | Name: ZINC ION / type: ligand / ID: 3 / Number of copies: 2 / Formula: ZN |
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Molecular weight | Theoretical: 65.409 Da |
-Macromolecule #4: MAGNESIUM ION
Macromolecule | Name: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 1 / Formula: MG |
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Molecular weight | Theoretical: 24.305 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 | 0.8 mg/mL | ||||||||||||
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Buffer | pH: 7.8 Component:
Details: Solutions were made fresh. | ||||||||||||
Grid | Model: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: OTHER Details: Frozen sample preparation begins immediately after glow discharge | ||||||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV | ||||||||||||
Details | This sample was monodisperse. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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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 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Number images used: 362657 |
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Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |