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- EMDB-23970: Full length SARS-CoV-2 Nsp2 -

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Basic information

Entry
Database: EMDB / ID: EMD-23970
TitleFull length SARS-CoV-2 Nsp2
Map dataSARS-CoV-2 Nsp2 main map
Sample
  • Complex: SARS-CoV-2 Nsp2
    • Protein or peptide: Non-structural protein 2
  • 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
Methodsingle particle reconstruction / cryo EM / Resolution: 3.76 Å
AuthorsQCRG Structural Biology Consortium
Funding support United States, 4 items
OrganizationGrant numberCountry
DARPAHR0011-19-2-0020 United States
FastGrantsCOVID19 grant United States
Laboratory for Genomics ResearchExcellence in Research Award COVID19 United States
Quantitative Biosciences Institute United States
CitationJournal: bioRxiv / Year: 2021
Title: CryoEM and AI reveal a structure of SARS-CoV-2 Nsp2, a multifunctional protein involved in key host processes.
Authors: Meghna Gupta / Caleigh M Azumaya / Michelle Moritz / Sergei Pourmal / Amy Diallo / Gregory E Merz / Gwendolyn Jang / Mehdi Bouhaddou / Andrea Fossati / Axel F Brilot / Devan Diwanji / Evelyn ...Authors: Meghna Gupta / Caleigh M Azumaya / Michelle Moritz / Sergei Pourmal / Amy Diallo / Gregory E Merz / Gwendolyn Jang / Mehdi Bouhaddou / Andrea Fossati / Axel F Brilot / Devan Diwanji / Evelyn Hernandez / Nadia Herrera / Huong T Kratochvil / Victor L Lam / Fei Li / Yang Li / Henry C Nguyen / Carlos Nowotny / Tristan W Owens / Jessica K Peters / Alexandrea N Rizo / Ursula Schulze-Gahmen / Amber M Smith / Iris D Young / Zanlin Yu / Daniel Asarnow / Christian Billesbølle / Melody G Campbell / Jen Chen / Kuei-Ho Chen / Un Seng Chio / Miles Sasha Dickinson / Loan Doan / Mingliang Jin / Kate Kim / Junrui Li / Yen-Li Li / Edmond Linossi / Yanxin Liu / Megan Lo / Jocelyne Lopez / Kyle E Lopez / Adamo Mancino / Frank R Moss / Michael D Paul / Komal Ishwar Pawar / Adrian Pelin / Thomas H Pospiech / Cristina Puchades / Soumya Govinda Remesh / Maliheh Safari / Kaitlin Schaefer / Ming Sun / Mariano C Tabios / Aye C Thwin / Erron W Titus / Raphael Trenker / Eric Tse / Tsz Kin Martin Tsui / Feng Wang / Kaihua Zhang / Yang Zhang / Jianhua Zhao / Fengbo Zhou / Yuan Zhou / Lorena Zuliani-Alvarez / / David A Agard / Yifan Cheng / James S Fraser / Natalia Jura / Tanja Kortemme / Aashish Manglik / Daniel R Southworth / Robert M Stroud / Danielle L Swaney / Nevan J Krogan / Adam Frost / Oren S Rosenberg / Kliment A Verba
Abstract: The SARS-CoV-2 protein Nsp2 has been implicated in a wide range of viral processes, but its exact functions, and the structural basis of those functions, remain unknown. Here, we report an atomic ...The SARS-CoV-2 protein Nsp2 has been implicated in a wide range of viral processes, but its exact functions, and the structural basis of those functions, remain unknown. Here, we report an atomic model for full-length Nsp2 obtained by combining cryo-electron microscopy with deep learning-based structure prediction from AlphaFold2. The resulting structure reveals a highly-conserved zinc ion-binding site, suggesting a role for Nsp2 in RNA binding. Mapping emerging mutations from variants of SARS-CoV-2 on the resulting structure shows potential host-Nsp2 interaction regions. Using structural analysis together with affinity tagged purification mass spectrometry experiments, we identify Nsp2 mutants that are unable to interact with the actin-nucleation-promoting WASH protein complex or with GIGYF2, an inhibitor of translation initiation and modulator of ribosome-associated quality control. Our work suggests a potential role of Nsp2 in linking viral transcription within the viral replication-transcription complexes (RTC) to the translation initiation of the viral message. Collectively, the structure reported here, combined with mutant interaction mapping, provides a foundation for functional studies of this evolutionary conserved coronavirus protein and may assist future drug design.
History
DepositionMay 12, 2021-
Header (metadata) releaseMay 26, 2021-
Map releaseMay 26, 2021-
UpdateMay 26, 2021-
Current statusMay 26, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7msw
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_23970.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSARS-CoV-2 Nsp2 main map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 280 pix.
= 233.52 Å
0.83 Å/pix.
x 280 pix.
= 233.52 Å
0.83 Å/pix.
x 280 pix.
= 233.52 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: 0.017 / Movie #1: 0.015
Minimum - Maximum-0.040741693 - 0.074364066
Average (Standard dev.)-1.5727719e-05 (±0.0018917692)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 233.52 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8340.8340.834
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z233.520233.520233.520
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ360360360
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS280280280
D min/max/mean-0.0410.074-0.000

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Supplemental data

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Mask #1

Fileemd_23970_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: SARS-CoV-2 Nsp2 half map - Odd

Fileemd_23970_half_map_1.map
AnnotationSARS-CoV-2 Nsp2 half map - Odd
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: SARS-CoV-2 Nsp2 half map - Even

Fileemd_23970_half_map_2.map
AnnotationSARS-CoV-2 Nsp2 half map - Even
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire : SARS-CoV-2 Nsp2

EntireName: SARS-CoV-2 Nsp2
Components
  • Complex: SARS-CoV-2 Nsp2
    • Protein or peptide: Non-structural protein 2
  • Ligand: ZINC ION

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Supramolecule #1: SARS-CoV-2 Nsp2

SupramoleculeName: SARS-CoV-2 Nsp2 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
Molecular weightExperimental: 71 KDa

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Macromolecule #1: Non-structural protein 2

MacromoleculeName: Non-structural protein 2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 70.590219 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: AYTRYVDNNF CGPDGYPLEC IKDLLARAGK ASCTLSEQLD FIDTKRGVYC CREHEHEIAW YTERSEKSYE LQTPFEIKLA KKFDTFNGE CPNFVFPLNS IIKTIQPRVE KKKLDGFMGR IRSVYPVASP NECNQMCLST LMKCDHCGET SWQTGDFVKA T CEFCGTEN ...String:
AYTRYVDNNF CGPDGYPLEC IKDLLARAGK ASCTLSEQLD FIDTKRGVYC CREHEHEIAW YTERSEKSYE LQTPFEIKLA KKFDTFNGE CPNFVFPLNS IIKTIQPRVE KKKLDGFMGR IRSVYPVASP NECNQMCLST LMKCDHCGET SWQTGDFVKA T CEFCGTEN LTKEGATTCG YLPQNAVVKI YCPACHNSEV GPEHSLAEYH NESGLKTILR KGGRTIAFGG CVFSYVGCHN KC AYWVPRA SANIGCNHTG VVGEGSEGLN DNLLEILQKE KVNINIVGDF KLNEEIAIIL ASFSASTSAF VETVKGLDYK AFK QIVESC GNFKVTKGKA KKGAWNIGEQ KSILSPLYAF ASEAARVVRS IFSRTLETAQ NSVRVLQKAA ITILDGISQY SLRL IDAMM FTSDLATNNL VVMAYITGGV VQLTSQWLTN IFGTVYEKLK PVLDWLEEKF KEGVEFLRDG WEIVKFISTC ACEIV GGQI VTCAKEIKES VQTFFKLVNK FLALCADSII IGGAKLKALN LGETFVTHSK GLYRKCVKSR EETGLLMPLK APKEII FLE GETLPTEVLT EEVVLKTGDL QPLEQPTSEA VEAPLVGTPV CINGLMLLEI KDTEKYCALA PNMMVTNNTF TLKGG

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Macromolecule #2: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 2 / Number of copies: 3 / 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

Concentration0.42 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
250.0 mMNaClSodium chloridesodium chloride
20.0 mMC4H11NO3Tris
0.5 mMC9H15O6Ptris(2-carboxyethyl)phosphine

Details: Filtered and degassed before running FPLC
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV
Details: Blot for 5 seconds before plunging into liquid ethane.
DetailsThis sample was monodisperse

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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 / Nominal magnification: 105000
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 66.0 e/Å2
Details: Two datasets comprising of 804 and 1116 118-frame super-resolution movies each were collected with a 3x3 image shift at a magnification of 105,000x with physical pixel size of 0.834 ang/pix ...Details: Two datasets comprising of 804 and 1116 118-frame super-resolution movies each were collected with a 3x3 image shift at a magnification of 105,000x with physical pixel size of 0.834 ang/pix on a Titan Krios (ThermoFisher) equipped with a K3 camera and a Bioquantum energy filter (Gatan) set to a slit width of 20 eV. Collection dose rate was 8 e-/pixel/second for a total dose of 66 e-/ang^2. Defocus range was 0.8 to 2.4 micron. Each collection was performed with semi-automated scripts in SerialEM.
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. v2.15.0)
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.76 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. v2.15.0) / Number images used: 42579
FSC plot (resolution estimation)

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