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- EMDB-13138: SARS-CoV-2 RdRp with Molnupiravir/ NHC in the template strand bas... -

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Basic information

Entry
Database: EMDB / ID: EMD-13138
TitleSARS-CoV-2 RdRp with Molnupiravir/ NHC in the template strand base-paired with G
Map data
Sample
  • Complex: RdRpRNA-dependent RNA polymerase
    • Protein or peptide: Replicase polyprotein 1ab
    • Protein or peptide: Non-structural protein 8
    • Protein or peptide: Non-structural protein 7
    • RNA: Product RNA
    • RNA: Template RNA
  • Ligand: ZINC ION
Function / homology
Function and homology information


Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / viral RNA-directed RNA polymerase complex / exoribonuclease complex / endoribonuclease complex / Transcription of SARS-CoV-2 sgRNAs / endopeptidase complex / 5'-3' RNA helicase activity / mRNA cap methyltransferase complex ...Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / viral RNA-directed RNA polymerase complex / exoribonuclease complex / endoribonuclease complex / Transcription of SARS-CoV-2 sgRNAs / endopeptidase complex / 5'-3' RNA helicase activity / mRNA cap methyltransferase complex / RNA phosphodiester bond hydrolysis, exonucleolytic / Translation of Replicase and Assembly of the Replication Transcription Complex / Replication of the SARS-CoV-2 genome / positive regulation of RNA biosynthetic process / Lyases; Phosphorus-oxygen lyases / modulation by virus of host autophagy / mRNA methylation / double membrane vesicle viral factory outer membrane / suppression by virus of host translation / ISG15-specific peptidase activity / SARS coronavirus main proteinase / suppression by virus of host type I interferon production / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / 3'-5'-exoribonuclease activity / host cell endosome / host cell endoplasmic reticulum-Golgi intermediate compartment / induction by virus of catabolism of host mRNA / cytoplasmic viral factory / protein K48-linked deubiquitination / G-quadruplex RNA binding / suppression by virus of host ISG15-protein conjugation / 7-methylguanosine mRNA capping / transcription, RNA-templated / viral transcription / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / host cell Golgi apparatus / suppression by virus of host toll-like receptor signaling pathway / host cell endoplasmic reticulum / suppression by virus of host NF-kappaB cascade / modulation by virus of host protein ubiquitination / protein K63-linked deubiquitination / methyltransferase cap1 / positive regulation of viral genome replication / mRNA (nucleoside-2'-O-)-methyltransferase activity / positive stranded viral RNA replication / suppression by virus of host TRAF activity / protein autoprocessing / cysteine-type peptidase activity / helicase activity / ubiquitinyl hydrolase 1 / DNA helicase / DNA helicase activity / cysteine-type deubiquitinase activity / single-stranded RNA binding / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / protein processing / host cell perinuclear region of cytoplasm / viral protein processing / RNA helicase / lyase activity / induction by virus of host autophagy / RNA-directed RNA polymerase / suppression by virus of host gene expression / endonuclease activity / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed 5'-3' RNA polymerase activity / transcription, DNA-templated / suppression by virus of host type I interferon-mediated signaling pathway / host cell cytoplasm / protein dimerization activity / host cell nucleus / ATP hydrolysis activity / protein homodimerization activity / zinc ion binding / integral component of membrane / ATP binding / identical protein binding / cytosol
Similarity search - Function
RNA-dependent RNA polymerase, SARS-CoV-like / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nonstructural protein 14, betacoronavirus / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nidoviral uridylate-specific endoribonuclease (NendoU) domain profile. / Arterivirus Nsp11 N-terminal/coronavirus NSP15 middle (AV-Nsp11N/CoV-Nsp15M) domain profile. ...RNA-dependent RNA polymerase, SARS-CoV-like / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nonstructural protein 14, betacoronavirus / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nidoviral uridylate-specific endoribonuclease (NendoU) domain profile. / Arterivirus Nsp11 N-terminal/coronavirus NSP15 middle (AV-Nsp11N/CoV-Nsp15M) domain profile. / Viral (Superfamily 1) RNA helicase / Nonstructural protein 15, N-terminal domain, alpha/beta-coronavirus / NSP15, NendoU domain, coronavirus / Nonstructural protein 13, 1B domain, coronavirus / Coronavirus replicase NSP15, middle domain / Coronavirus replicase NSP15, N-terminal oligomerisation / Coronavirus proofreading exoribonuclease / Non-structural protein NSP16, coronavirus-like / Coronavirus RNA-dependent RNA polymerase, N-terminal / RNA polymerase, N-terminal, coronavirus / Coronavirus 2'-O-methyltransferase / Non-structural protein 14, coronavirus / Non-structural protein NSP15, N-terminal domain superfamily, coronavirus / Non-structural protein NSP15, middle domain superfamily / Coronavirus replicase NSP15, N-terminal oligomerisation / Nonstructural protein 15, middle domain, coronavirus / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain / Nonstructural protein 13, zinc-binding domain, coronavirus-like / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain profile. / Coronaviridae zinc-binding (CV ZBD) domain profile. / NendoU domain, nidovirus / Coronavirus replicase NSP15, uridylate-specific endoribonuclease / Endoribonuclease EndoU-like / Non-structural protein NSP3, SUD-N (Mac2) domain, betacoronavirus / Sarbecovirus Nsp3c-N domain profile. / Non-structural protein 2, SARS-CoV-like / Non-structural protein NSP3, SUD-N (Mac2) domain superfamily, betacoronavirus / Betacoronavirus replicase NSP3, N-terminal / Polyprotein cleavage domain PL2pro superfamily, betacoronavirus / Betacoronavirus SUD-C domain / Non-structural protein NSP3, N-terminal, betacoronavirus / Non-structural protein NSP1 superfamily, betacoronavirus / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / Carbamoyl-phosphate synthase subdomain signature 2. / Betacoronavirus (BetaCoV) Nsp1 C-terminal domain profile. / Lipocalin signature. / Coronavirus (CoV) Nsp1 globular domain profile. / Betacoronavirus Nsp3c-M domain profile. / Betacoronavirus single-stranded poly(A) binding domain / Betacoronavirus replicase NSP1 / Non-structural protein NSP3, SUD-M domain, betacoronavirus / Non-structural protein NSP3, SUD-M domain superfamily, betacoronavirus / Non-structural protein NSP1, betacoronavirus / Betacoronavirus Nsp3e nucleic acid-binding (NAB) domain profile. / Betacoronavirus Nsp3c-C domain profile. / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp7 cofactor domain profile. / DPUP/SUD, C-terminal, betacoronavirus / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp8 cofactor domain profile. / Coronavirus (CoV) ExoN/MTase coactivator domain profile. / Coronavirus Nsp9 single-stranded RNA (ssRNA)-binding domain profile. / Non-structural protein NSP3, nucleic acid-binding domain superfamily, betacoronavirus / Non-structural protein 6, betacoronavirus / Betacoronavirus nucleic acid-binding (NAB) / Non-structural protein NSP3A domain-like superfamily / Non-structural protein NSP3, nucleic acid-binding domain, betacoronavirus / Papain-like protease, N-terminal domain superfamily, coronavirus / Papain-like viral protease, palm and finger domains, coronavirus / Nonstructural protein 2, N-terminal domain, coronavirus / Coronavirus replicase NSP2, N-terminal / Non-structural protein 2, C-terminal domain, coronavirus / Coronavirus replicase NSP2, C-terminal / Coronavirus Nsp3d Ubl domain profile. / Coronavirus Nsp3a Ubl domain profile. / NSP3, first ubiquitin-like (Ubl) domain, coronavirus / Coronavirus Nsp4 C-terminal (Nsp4C) domain profile. / NSP3, second ubiquitin-like (Ubl) domain, coronavirus / Papain-like protease, thumb domain superfamily, coronavirus / Non-structural protein NSP7, coronavirus / Peptidase family C16 domain profile. / Coronavirus replicase NSP7 / Non-structural protein 6, coronavirus / Coronavirus replicase NSP3, C-terminal / Non-structural protein NSP4, N-terminal, coronavirus / Coronavirus RNA synthesis protein NSP10 / Coronavirus replicase NSP8 / Coronavirus endopeptidase C30 / Coronavirus main protease (M-pro) domain profile. / Non-structural protein NSP7 superfamily, coronavirus / Peptidase C30, domain 3, coronavirus / Non-structural protein NSP8, coronavirus / Coronavirus replicase NSP3, C-terminal / Coronavirus replicase NSP4, N-terminal / Coronavirus replicase NSP6 / Non-structural protein NSP4, C-terminal superfamily, coronavirus / Peptidase C30, coronavirus / Peptidase C16, coronavirus / Non-structural protein NSP9, coronavirus / Coronavirus papain-like peptidase / RNA synthesis protein NSP10, coronavirus
Similarity search - Domain/homology
Replicase polyprotein 1ab
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2 / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsKabinger F / Stiller C / Schmitzova J / Dienemann C / Kokic G / Hillen HS / Hoebartner C / Cramer P
Funding support Germany, 5 items
OrganizationGrant numberCountry
German Research Foundation (DFG)SFB1190, FOR2848, EXC 2067/1-390729940 Germany
German Research Foundation (DFG)SPP1784 Germany
European Research Council (ERC)682586 Germany
German Research Foundation (DFG)SFB860, SPP2191, EXC 2067/1-390729940) Germany
European Research Council (ERC)693023 Germany
Citation
Journal: Nat Struct Mol Biol / Year: 2021
Title: Mechanism of molnupiravir-induced SARS-CoV-2 mutagenesis.
Authors: Florian Kabinger / Carina Stiller / Jana Schmitzová / Christian Dienemann / Goran Kokic / Hauke S Hillen / Claudia Höbartner / Patrick Cramer /
Abstract: Molnupiravir is an orally available antiviral drug candidate currently in phase III trials for the treatment of patients with COVID-19. Molnupiravir increases the frequency of viral RNA mutations and ...Molnupiravir is an orally available antiviral drug candidate currently in phase III trials for the treatment of patients with COVID-19. Molnupiravir increases the frequency of viral RNA mutations and impairs SARS-CoV-2 replication in animal models and in humans. Here, we establish the molecular mechanisms underlying molnupiravir-induced RNA mutagenesis by the viral RNA-dependent RNA polymerase (RdRp). Biochemical assays show that the RdRp uses the active form of molnupiravir, β-D-N-hydroxycytidine (NHC) triphosphate, as a substrate instead of cytidine triphosphate or uridine triphosphate. When the RdRp uses the resulting RNA as a template, NHC directs incorporation of either G or A, leading to mutated RNA products. Structural analysis of RdRp-RNA complexes that contain mutagenesis products shows that NHC can form stable base pairs with either G or A in the RdRp active center, explaining how the polymerase escapes proofreading and synthesizes mutated RNA. This two-step mutagenesis mechanism probably applies to various viral polymerases and can explain the broad-spectrum antiviral activity of molnupiravir.
#1: Journal: Biorxiv / Year: 2021
Title: Mechanism of molnupiravir-induced SARS-CoV-2 mutagenesis
Authors: Kabinger F / Stiller C / Schmitzova J / Dienemann C / Hillen HS / Hobartner C / Cramer P
History
DepositionJun 28, 2021-
Header (metadata) releaseAug 18, 2021-
Map releaseAug 18, 2021-
UpdateSep 29, 2021-
Current statusSep 29, 2021Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0096
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.0096
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7ozv
  • Surface level: 0.0096
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
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Supplemental images

Downloads & links

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Map

FileDownload / File: emd_13138.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 240 pix.
= 200.16 Å
0.83 Å/pix.
x 240 pix.
= 200.16 Å
0.83 Å/pix.
x 240 pix.
= 200.16 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.834 Å
Density
Contour LevelBy AUTHOR: 0.0096 / Movie #1: 0.0096
Minimum - Maximum-0.04016814 - 0.058391303
Average (Standard dev.)-0.00013555982 (±0.001804757)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 200.16 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8340.8340.834
M x/y/z240240240
origin x/y/z0.0000.0000.000
length x/y/z200.160200.160200.160
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ500500500
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS240240240
D min/max/mean-0.0400.058-0.000

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Supplemental data

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Mask #1

Fileemd_13138_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #2

Fileemd_13138_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #1

Fileemd_13138_half_map_2.map
Projections & Slices
AxesZYX

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Density Histograms

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Sample components

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Entire : RdRp

EntireName: RdRpRNA-dependent RNA polymerase
Components
  • Complex: RdRpRNA-dependent RNA polymerase
    • Protein or peptide: Replicase polyprotein 1ab
    • Protein or peptide: Non-structural protein 8
    • Protein or peptide: Non-structural protein 7
    • RNA: Product RNA
    • RNA: Template RNA
  • Ligand: ZINC ION

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Supramolecule #1: RdRp

SupramoleculeName: RdRp / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Molecular weightTheoretical: 183.81 kDa/nm

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Macromolecule #1: Replicase polyprotein 1ab

MacromoleculeName: Replicase polyprotein 1ab / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 106.780977 KDa
Recombinant expressionOrganism: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
SequenceString: SADAQSFLNR VCGVSAARLT PCGTGTSTDV VYRAFDIYND KVAGFAKFLK TNCCRFQEKD EDDNLIDSYF VVKRHTFSNY QHEETIYNL LKDCPAVAKH DFFKFRIDGD MVPHISRQRL TKYTMADLVY ALRHFDEGNC DTLKEILVTY NCCDDDYFNK K DWYDFVEN ...String:
SADAQSFLNR VCGVSAARLT PCGTGTSTDV VYRAFDIYND KVAGFAKFLK TNCCRFQEKD EDDNLIDSYF VVKRHTFSNY QHEETIYNL LKDCPAVAKH DFFKFRIDGD MVPHISRQRL TKYTMADLVY ALRHFDEGNC DTLKEILVTY NCCDDDYFNK K DWYDFVEN PDILRVYANL GERVRQALLK TVQFCDAMRN AGIVGVLTLD NQDLNGNWYD FGDFIQTTPG SGVPVVDSYY SL LMPILTL TRALTAESHV DTDLTKPYIK WDLLKYDFTE ERLKLFDRYF KYWDQTYHPN CVNCLDDRCI LHCANFNVLF STV FPPTSF GPLVRKIFVD GVPFVVSTGY HFRELGVVHN QDVNLHSSRL SFKELLVYAA DPAMHAASGN LLLDKRTTCF SVAA LTNNV AFQTVKPGNF NKDFYDFAVS KGFFKEGSSV ELKHFFFAQD GNAAISDYDY YRYNLPTMCD IRQLLFVVEV VDKYF DCYD GGCINANQVI VNNLDKSAGF PFNKWGKARL YYDSMSYEDQ DALFAYTKRN VIPTITQMNL KYAISAKNRA RTVAGV SIC STMTNRQFHQ KLLKSIAATR GATVVIGTSK FYGGWHNMLK TVYSDVENPH LMGWDYPKCD RAMPNMLRIM ASLVLAR KH TTCCSLSHRF YRLANECAQV LSEMVMCGGS LYVKPGGTSS GDATTAYANS VFNICQAVTA NVNALLSTDG NKIADKYV R NLQHRLYECL YRNRDVDTDF VNEFYAYLRK HFSMMILSDD AVVCFNSTYA SQGLVASIKN FKSVLYYQNN VFMSEAKCW TETDLTKGPH EFCSQHTMLV KQGDDYVYLP YPDPSRILGA GCFVDDIVKT DGTLMIERFV SLAIDAYPLT KHPNQEYADV FHLYLQYIR KLHDELTGHM LDMYSVMLTN DNTSRYWEPE FYEAMYTPHT VLQ

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Macromolecule #2: Non-structural protein 8

MacromoleculeName: Non-structural protein 8 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 24.161445 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MGSSHHHHHH ENLYFQSNAA IASEFSSLPS YAAFATAQEA YEQAVANGDS EVVLKKLKKS LNVAKSEFDR DAAMQRKLEK MADQAMTQM YKQARSEDKR AKVTSAMQTM LFTMLRKLDN DALNNIINNA RDGCVPLNII PLTTAAKLMV VIPDYNTYKN T CDGTTFTY ...String:
MGSSHHHHHH ENLYFQSNAA IASEFSSLPS YAAFATAQEA YEQAVANGDS EVVLKKLKKS LNVAKSEFDR DAAMQRKLEK MADQAMTQM YKQARSEDKR AKVTSAMQTM LFTMLRKLDN DALNNIINNA RDGCVPLNII PLTTAAKLMV VIPDYNTYKN T CDGTTFTY ASALWEIQQV VDADSKIVQL SEISMDNSPN LAWPLIVTAL RANSAVKLQ

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Macromolecule #3: Non-structural protein 7

MacromoleculeName: Non-structural protein 7 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.279776 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
SNASKMSDVK CTSVVLLSVL QQLRVESSSK LWAQCVQLHN DILLAKDTTE AFEKMVSLLS VLLSMQGAVD INKLCEEMLD NRAT

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Macromolecule #4: Product RNA

MacromoleculeName: Product RNA / type: rna / ID: 4 / Number of copies: 1
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 10.258101 KDa
SequenceString:
UUGGUCUCAA UACGGUAUGA GCCUACGCAG UG

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Macromolecule #5: Template RNA

MacromoleculeName: Template RNA / type: rna / ID: 5 / Number of copies: 1
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 10.539256 KDa
SequenceString:
GG(16B)ACUGCGU AGCUCAUACC GUAUUGAGAC CUU

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Macromolecule #6: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 6 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 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

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 59.6 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 851168

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