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- EMDB-23025: PRC2:EZH1_B from a dimeric PRC2 bound to a nucleosome -

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Entry
Database: EMDB / ID: EMD-23025
TitlePRC2:EZH1_B from a dimeric PRC2 bound to a nucleosome
Map dataPRC2:EZH1_B from a dimeric PRC2 bound to a nucleosome
Sample
  • Complex: PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome
    • Protein or peptide: Histone-lysine N-methyltransferase EZH1
    • Protein or peptide: Polycomb protein EED
    • Protein or peptide: Polycomb protein SUZ12
    • Protein or peptide: Histone-binding protein RBBP4
  • Ligand: ZINC ION
KeywordsChromatin / methyltransferase / nucleosome-modifying complex / GENE REGULATION / GENE REGULATION-Transferase complex
Function / homology
Function and homology information


[histone H3]-lysine27 N-trimethyltransferase / sex chromatin / CAF-1 complex / histone H3K27 trimethyltransferase activity / random inactivation of X chromosome / histone H3K27 methyltransferase activity / facultative heterochromatin formation / NURF complex / NuRD complex / regulation of cell fate specification ...[histone H3]-lysine27 N-trimethyltransferase / sex chromatin / CAF-1 complex / histone H3K27 trimethyltransferase activity / random inactivation of X chromosome / histone H3K27 methyltransferase activity / facultative heterochromatin formation / NURF complex / NuRD complex / regulation of cell fate specification / negative regulation of stem cell population maintenance / DNA replication-dependent chromatin assembly / ESC/E(Z) complex / Transcription of E2F targets under negative control by p107 (RBL1) and p130 (RBL2) in complex with HDAC1 / chromatin silencing complex / regulation of stem cell differentiation / RSC-type complex / Transcription of E2F targets under negative control by DREAM complex / Polo-like kinase mediated events / lncRNA binding / spinal cord development / G1/S-Specific Transcription / positive regulation of stem cell population maintenance / ATPase complex / histone methyltransferase activity / Sin3-type complex / oligodendrocyte differentiation / Transcriptional Regulation by E2F6 / RNA Polymerase I Transcription Initiation / histone deacetylase complex / negative regulation of cell differentiation / G0 and Early G1 / subtelomeric heterochromatin formation / anatomical structure morphogenesis / nucleosome binding / heterochromatin / Cyclin E associated events during G1/S transition / Transcriptional regulation of brown and beige adipocyte differentiation by EBF2 / Cyclin A:Cdk2-associated events at S phase entry / Deposition of new CENPA-containing nucleosomes at the centromere / Regulation of TP53 Activity through Acetylation / enzyme activator activity / methylated histone binding / SUMOylation of chromatin organization proteins / transcription corepressor binding / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / negative regulation of cell migration / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / Regulation of PTEN gene transcription / Defective pyroptosis / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / promoter-specific chromatin binding / hippocampus development / negative regulation of transforming growth factor beta receptor signaling pathway / molecular condensate scaffold activity / brain development / chromatin DNA binding / heterochromatin formation / PKMTs methylate histone lysines / histone deacetylase binding / Activation of anterior HOX genes in hindbrain development during early embryogenesis / HCMV Early Events / transcription corepressor activity / nucleosome assembly / chromosome / histone binding / Oxidative Stress Induced Senescence / methylation / Potential therapeutics for SARS / DNA replication / cell population proliferation / chromosome, telomeric region / nuclear body / chromatin remodeling / ribonucleoprotein complex / RNA polymerase II cis-regulatory region sequence-specific DNA binding / negative regulation of cell population proliferation / negative regulation of DNA-templated transcription / chromatin binding / positive regulation of cell population proliferation / regulation of DNA-templated transcription / chromatin / nucleolus / positive regulation of DNA-templated transcription / negative regulation of transcription by RNA polymerase II / positive regulation of transcription by RNA polymerase II / protein-containing complex / nucleoplasm / identical protein binding / nucleus / metal ion binding / cytosol
Similarity search - Function
EZH1, SET domain / Polycomb protein, VEFS-Box / VEFS-Box of polycomb protein / Histone-lysine N-methyltransferase EZH1/EZH2 / Polycomb repressive complex 2 subunit EZH1/EZH2, tri-helical domain / Pre-SET CXC domain / : / WD repeat binding protein EZH2 / Polycomb repressive complex 2 tri-helical domain / CXC domain ...EZH1, SET domain / Polycomb protein, VEFS-Box / VEFS-Box of polycomb protein / Histone-lysine N-methyltransferase EZH1/EZH2 / Polycomb repressive complex 2 subunit EZH1/EZH2, tri-helical domain / Pre-SET CXC domain / : / WD repeat binding protein EZH2 / Polycomb repressive complex 2 tri-helical domain / CXC domain / Ezh2, MCSS domain / Tesmin/TSO1-like CXC domain / Tesmin/TSO1-like CXC domain / CXC domain / Histone-lysine N-methyltransferase EZH1/2-like / CXC domain profile. / Histone-binding protein RBBP4, N-terminal / Histone-binding protein RBBP4 or subunit C of CAF1 complex / : / : / SET (Su(var)3-9, Enhancer-of-zeste, Trithorax) domain / SET domain / SET domain superfamily / SET domain profile. / SET domain / SANT SWI3, ADA2, N-CoR and TFIIIB'' DNA-binding domains / SANT/Myb domain / Zinc finger C2H2 type domain signature. / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Polycomb protein EED / Histone-binding protein RBBP4 / Polycomb protein SUZ12 / Histone-lysine N-methyltransferase EZH1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.8 Å
AuthorsGrau DJ / Armache KJ
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM115882 United States
CitationJournal: Nat Commun / Year: 2021
Title: Structures of monomeric and dimeric PRC2:EZH1 reveal flexible modules involved in chromatin compaction.
Authors: Daniel Grau / Yixiao Zhang / Chul-Hwan Lee / Marco Valencia-Sánchez / Jenny Zhang / Miao Wang / Marlene Holder / Vladimir Svetlov / Dongyan Tan / Evgeny Nudler / Danny Reinberg / Thomas ...Authors: Daniel Grau / Yixiao Zhang / Chul-Hwan Lee / Marco Valencia-Sánchez / Jenny Zhang / Miao Wang / Marlene Holder / Vladimir Svetlov / Dongyan Tan / Evgeny Nudler / Danny Reinberg / Thomas Walz / Karim-Jean Armache /
Abstract: Polycomb repressive complex 2 (PRC2) is a histone methyltransferase critical for maintaining gene silencing during eukaryotic development. In mammals, PRC2 activity is regulated in part by the ...Polycomb repressive complex 2 (PRC2) is a histone methyltransferase critical for maintaining gene silencing during eukaryotic development. In mammals, PRC2 activity is regulated in part by the selective incorporation of one of two paralogs of the catalytic subunit, EZH1 or EZH2. Each of these enzymes has specialized biological functions that may be partially explained by differences in the multivalent interactions they mediate with chromatin. Here, we present two cryo-EM structures of PRC2:EZH1, one as a monomer and a second one as a dimer bound to a nucleosome. When bound to nucleosome substrate, the PRC2:EZH1 dimer undergoes a dramatic conformational change. We demonstrate that mutation of a divergent EZH1/2 loop abrogates the nucleosome-binding and methyltransferase activities of PRC2:EZH1. Finally, we show that PRC2:EZH1 dimers are more effective than monomers at promoting chromatin compaction, and the divergent EZH1/2 loop is essential for this function, thereby tying together the methyltransferase, nucleosome-binding, and chromatin-compaction activities of PRC2:EZH1. We speculate that the conformational flexibility and the ability to dimerize enable PRC2 to act on the varied chromatin substrates it encounters in the cell.
History
DepositionNov 24, 2020-
Header (metadata) releaseFeb 3, 2021-
Map releaseFeb 3, 2021-
UpdateMar 6, 2024-
Current statusMar 6, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.007
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.007
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7ktp
  • Surface level: 0.007
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23025.png

Downloads & links

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Map

FileDownload / File: emd_23025.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationPRC2:EZH1_B from a dimeric PRC2 bound to a nucleosome
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.35 Å/pix.
x 300 pix.
= 405. Å		1.35 Å/pix.
x 300 pix.
= 405. Å		1.35 Å/pix.
x 300 pix.
= 405. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.35 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.007 / Movie #1: 0.007
Minimum - Maximum-0.016329886 - 0.028344044
Average (Standard dev.)-0.000115115334 (±0.00069154135)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 405.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.351.351.35
M x/y/z300300300
origin x/y/z0.0000.0000.000
length x/y/z405.000405.000405.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ300300300
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS300300300
D min/max/mean-0.0160.028-0.000

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Supplemental data

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Sample components

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Entire : PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome

EntireName: PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome
Components
  • Complex: PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome
    • Protein or peptide: Histone-lysine N-methyltransferase EZH1
    • Protein or peptide: Polycomb protein EED
    • Protein or peptide: Polycomb protein SUZ12
    • Protein or peptide: Histone-binding protein RBBP4
  • Ligand: ZINC ION

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Supramolecule #1: PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome

SupramoleculeName: PRC2:EZH1_A from a PRC2:EZH1 dimer bound to a nucleosome
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 266 KDa

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Macromolecule #1: Histone-lysine N-methyltransferase EZH1

MacromoleculeName: Histone-lysine N-methyltransferase EZH1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: [histone H3]-lysine27 N-trimethyltransferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 85.394141 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MEIPNPPTSK CITYWKRKVK SEYMRLRQLK RLQANMGAKA LYVANFAKVQ EKTQILNEEW KKLRVQPVQS MKPVSGHPFL KKCTIESIF PGFASQHMLM RSLNTVALVP IMYSWSPLQQ NFMVEDETVL CNIPYMGDEV KEEDETFIEE LINNYDGKVH G EEEMIPGS ...String:
MEIPNPPTSK CITYWKRKVK SEYMRLRQLK RLQANMGAKA LYVANFAKVQ EKTQILNEEW KKLRVQPVQS MKPVSGHPFL KKCTIESIF PGFASQHMLM RSLNTVALVP IMYSWSPLQQ NFMVEDETVL CNIPYMGDEV KEEDETFIEE LINNYDGKVH G EEEMIPGS VLISDAVFLE LVDALNQYSD EEEEGHNDTS DGKQDDSKED LPVTRKRKRH AIEGNKKSSK KQFPNDMIFS AI ASMFPEN GVPDDMKERY RELTEMSDPN ALPPQCTPNI DGPNAKSVQR EQSLHSFHTL FCRRCFKYDC FLHPFHATPN VYK RKNKEI KIEPEPCGTD CFLLLEGAKE YAMLHNPRSK CSGRRRRRHH IVSASCSNAS ASAVAETKEG DSDRDTGNDW ASSS SEANS RCQTPTKQKA SPAPPQLCVV EAPSEPVEWT GAEESLFRVF HGTYFNNFCS IARLLGTKTC KQVFQFAVKE SLILK LPTD ELMNPSQKKK RKHRLWAAHC RKIQLKKDNS STQVYNYQPC DHPDRPCDST CPCIMTQNFC EKFCQCNPDC QNRFPG CRC KTQCNTKQCP CYLAVRECDP DLCLTCGASE HWDCKVVSCK NCSIQRGLKK HLLLAPSDVA GWGTFIKESV QKNEFIS EY CGELISQDEA DRRGKVYDKY MSSFLFNLNN DFVVDATRKG NKIRFANHSV NPNCYAKVVM VNGDHRIGIF AKRAIQAG E ELFFDYRYSQ ADALKYVGIE RETDVL

UniProtKB: Histone-lysine N-methyltransferase EZH1

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Macromolecule #2: Polycomb protein EED

MacromoleculeName: Polycomb protein EED / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 50.267691 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSEREVSTAP AGTDMPAAKK QKLSSDENSN PDLSGDENDD AVSIESGTNT ERPDTPTNTP NAPGRKSWGK GKWKSKKCKY SFKCVNSLK EDHNQPLFGV QFNWHSKEGD PLVFATVGSN RVTLYECHSQ GEIRLLQSYV DADADENFYT CAWTYDSNTS H PLLAVAGS ...String:
MSEREVSTAP AGTDMPAAKK QKLSSDENSN PDLSGDENDD AVSIESGTNT ERPDTPTNTP NAPGRKSWGK GKWKSKKCKY SFKCVNSLK EDHNQPLFGV QFNWHSKEGD PLVFATVGSN RVTLYECHSQ GEIRLLQSYV DADADENFYT CAWTYDSNTS H PLLAVAGS RGIIRIINPI TMQCIKHYVG HGNAINELKF HPRDPNLLLS VSKDHALRLW NIQTDTLVAI FGGVEGHRDE VL SADYDLL GEKIMSCGMD HSLKLWRINS KRMMNAIKES YDYNPNKTNR PFISQKIHFP DFSTRDIHRN YVDCVRWLGD LIL SKSCEN AIVCWKPGKM EDDIDKIKPS ESNVTILGRF DYSQCDIWYM RFSMDFWQKM LALGNQVGKL YVWDLEVEDP HKAK CTTLT HHKCGAAIRQ TSFSRDSSIL IAVCDDASIW RWDRLR

UniProtKB: Polycomb protein EED

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Macromolecule #3: Polycomb protein SUZ12

MacromoleculeName: Polycomb protein SUZ12 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 83.181922 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MAPQKHGGGG GGGSGPSAGS GGGGFGGSAA VAAATASGGK SGGGSCGGGG SYSASSSSSA AAAAGAAVLP VKKPKMEHVQ ADHELFLQA FEKPTQIYRF LRTRNLIAPI FLHRTLTYMS HRNSRTNIKR KTFKVDDMLS KVEKMKGEQE SHSLSAHLQL T FTGFFHKN ...String:
MAPQKHGGGG GGGSGPSAGS GGGGFGGSAA VAAATASGGK SGGGSCGGGG SYSASSSSSA AAAAGAAVLP VKKPKMEHVQ ADHELFLQA FEKPTQIYRF LRTRNLIAPI FLHRTLTYMS HRNSRTNIKR KTFKVDDMLS KVEKMKGEQE SHSLSAHLQL T FTGFFHKN DKPSPNSENE QNSVTLEVLL VKVCHKKRKD VSCPIRQVPT GKKQVPLNPD LNQTKPGNFP SLAVSSNEFE PS NSHMVKS YSLLFRVTRP GRREFNGMIN GETNENIDVN EELPARRKRN REDGEKTFVA QMTVFDKNRR LQLLDGEYEV AMQ EMEECP ISKKRATWET ILDGKRLPPF ETFSQGPTLQ FTLRWTGETN DKSTAPIAKP LATRNSESLH QENKPGSVKP TQTI AVKES LTTDLQTRKE KDTPNENRQK LRIFYQFLYN NNTRQQTEAR DDLHCPWCTL NCRKLYSLLK HLKLCHSRFI FNYVY HPKG ARIDVSINEC YDGSYAGNPQ DIHRQPGFAF SRNGPVKRTP ITHILVCRPK RTKASMSEFL ESEDGEVEQQ RTYSSG HNR LYFHSDTCLP LRPQEMEVDS EDEKDPEWLR EKTITQIEEF SDVNEGEKEV MKLWNLHVMK HGFIADNQMN HACMLFV EN YGQKIIKKNL CRNFMLHLVS MHDFNLISIM SIDKAVTKLR EMQQKLEKGE SASPANEEIT EEQNGTANGF SEINSKEK A LETDSVSGVS KQSKKQKL

UniProtKB: Polycomb protein SUZ12

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Macromolecule #4: Histone-binding protein RBBP4

MacromoleculeName: Histone-binding protein RBBP4 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 47.709527 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MADKEAAFDD AVEERVINEE YKIWKKNTPF LYDLVMTHAL EWPSLTAQWL PDVTRPEGKD FSIHRLVLGT HTSDEQNHLV IASVQLPND DAQFDASHYD SEKGEFGGFG SVSGKIEIEI KINHEGEVNR ARYMPQNPCI IATKTPSSDV LVFDYTKHPS K PDPSGECN ...String:
MADKEAAFDD AVEERVINEE YKIWKKNTPF LYDLVMTHAL EWPSLTAQWL PDVTRPEGKD FSIHRLVLGT HTSDEQNHLV IASVQLPND DAQFDASHYD SEKGEFGGFG SVSGKIEIEI KINHEGEVNR ARYMPQNPCI IATKTPSSDV LVFDYTKHPS K PDPSGECN PDLRLRGHQK EGYGLSWNPN LSGHLLSASD DHTICLWDIS AVPKEGKVVD AKTIFTGHTA VVEDVSWHLL HE SLFGSVA DDQKLMIWDT RSNNTSKPSH SVDAHTAEVN CLSFNPYSEF ILATGSADKT VALWDLRNLK LKLHSFESHK DEI FQVQWS PHNETILASS GTDRRLNVWD LSKIGEEQSP EDAEDGPPEL LFIHGGHTAK ISDFSWNPNE PWVICSVSED NIMQ VWQMA ENIYNDEDPE GSVDPEGQGS

UniProtKB: Histone-binding protein RBBP4

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 7 / 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

Concentration0.12 mg/mL
BufferpH: 7.9
Component:
ConcentrationNameFormula
20.0 mMHEPES
50.0 mMsodium chlorideNaCl
1.0 mMmagnesium chlorideMgCl2
1.0 mMdithiothreitol
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 56.7 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 3410000 / Details: Template based picking
Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 26440
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD

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