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- EMDB-0879: Cryo-EM structure of a class A GPCR monomer -

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Basic information

Entry
Database: EMDB / ID: EMD-0879
TitleCryo-EM structure of a class A GPCR monomer
Map data
Sample
  • Complex: Ternary complex of chemokine-monomer, GPCR and G protein
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Interleukin-8Interleukin 8
    • Protein or peptide: C-X-C chemokine receptor type 2
    • Protein or peptide: scFv16
  • Ligand: CHOLESTEROL
Function / homology
Function and homology information


interleukin-8-mediated signaling pathway / metanephric tubule morphogenesis / negative regulation of neutrophil apoptotic process / interleukin-8 receptor activity / mast cell granule / regulation of single stranded viral RNA replication via double stranded DNA intermediate / regulation of entry of bacterium into host cell / interleukin-8 receptor binding / interleukin-8 binding / positive regulation of cellular biosynthetic process ...interleukin-8-mediated signaling pathway / metanephric tubule morphogenesis / negative regulation of neutrophil apoptotic process / interleukin-8 receptor activity / mast cell granule / regulation of single stranded viral RNA replication via double stranded DNA intermediate / regulation of entry of bacterium into host cell / interleukin-8 receptor binding / interleukin-8 binding / positive regulation of cellular biosynthetic process / C-X-C chemokine receptor activity / acute inflammatory response to antigenic stimulus / negative regulation of cell adhesion molecule production / negative regulation of G protein-coupled receptor signaling pathway / ATF4 activates genes in response to endoplasmic reticulum stress / CXCR chemokine receptor binding / C-C chemokine receptor activity / embryonic digestive tract development / neutrophil activation / C-C chemokine binding / induction of positive chemotaxis / positive regulation of vascular permeability / cellular response to fibroblast growth factor stimulus / chemokine-mediated signaling pathway / positive regulation of neutrophil chemotaxis / Chemokine receptors bind chemokines / chemokine activity / dendritic cell chemotaxis / midbrain development / positive regulation of cardiac muscle cell apoptotic process / Interleukin-10 signaling / Adenylate cyclase inhibitory pathway / positive regulation of protein localization to cell cortex / regulation of cAMP-mediated signaling / D2 dopamine receptor binding / cellular response to interleukin-1 / G protein-coupled serotonin receptor binding / cellular defense response / regulation of cell adhesion / regulation of mitotic spindle organization / cellular response to forskolin / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / response to endoplasmic reticulum stress / Peptide ligand-binding receptors / neutrophil chemotaxis / secretory granule membrane / Regulation of insulin secretion / G protein-coupled receptor activity / G protein-coupled receptor binding / calcium-mediated signaling / Olfactory Signaling Pathway / G-protein beta/gamma-subunit complex binding / Activation of the phototransduction cascade / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / Thromboxane signalling through TP receptor / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein activation / G protein-coupled acetylcholine receptor signaling pathway / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / response to molecule of bacterial origin / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / receptor internalization / ADP signalling through P2Y purinoceptor 12 / G beta:gamma signalling through BTK / mitotic spindle / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / Sensory perception of sweet, bitter, and umami (glutamate) taste / response to peptide hormone / photoreceptor disc membrane / Adrenaline,noradrenaline inhibits insulin secretion / Glucagon-type ligand receptors / Vasopressin regulates renal water homeostasis via Aquaporins / G alpha (z) signalling events / cellular response to catecholamine stimulus / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / ADORA2B mediated anti-inflammatory cytokines production / ADP signalling through P2Y purinoceptor 1 / adenylate cyclase-activating dopamine receptor signaling pathway / G beta:gamma signalling through PI3Kgamma / cellular response to prostaglandin E stimulus / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / sensory perception of taste / GPER1 signaling / positive regulation of angiogenesis / GDP binding / G-protein beta-subunit binding / Inactivation, recovery and regulation of the phototransduction cascade / heterotrimeric G-protein complex / microtubule cytoskeleton / chemotaxis / G alpha (12/13) signalling events / extracellular vesicle / antimicrobial humoral immune response mediated by antimicrobial peptide / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / retina development in camera-type eye
Similarity search - Function
CXC chemokine receptor 2 / CXC chemokine receptor 1/2 / CXC chemokine / CXC chemokine, conserved site / Small cytokines (intercrine/chemokine) C-x-C subfamily signature. / CXC Chemokine domain / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily ...CXC chemokine receptor 2 / CXC chemokine receptor 1/2 / CXC chemokine / CXC chemokine, conserved site / Small cytokines (intercrine/chemokine) C-x-C subfamily signature. / CXC Chemokine domain / Chemokine beta/gamma/delta / Intercrine alpha family (small cytokine C-X-C) (chemokine CXC). / Chemokine interleukin-8-like domain / Chemokine interleukin-8-like superfamily / Small cytokines (intecrine/chemokine), interleukin-8 like / G-protein alpha subunit, group I / G-alpha domain profile. / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G protein alpha subunit / G-protein, gamma subunit / G-protein gamma subunit domain profile. / GGL domain / G-protein gamma-like domain superfamily / G-protein gamma-like domain / GGL domain / G protein gamma subunit-like motifs / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Interleukin-8 / C-X-C chemokine receptor type 2 / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(i) subunit alpha-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsLiu ZJ / Hua T / Liu KW / Wu LJ
CitationJournal: Nature / Year: 2020
Title: Structural basis of CXC chemokine receptor 2 activation and signalling.
Authors: Kaiwen Liu / Lijie Wu / Shuguang Yuan / Meng Wu / Yueming Xu / Qianqian Sun / Shu Li / Suwen Zhao / Tian Hua / Zhi-Jie Liu /
Abstract: Chemokines and their receptors mediate cell migration, which influences multiple fundamental biological processes and disease conditions such as inflammation and cancer. Although ample effort has ...Chemokines and their receptors mediate cell migration, which influences multiple fundamental biological processes and disease conditions such as inflammation and cancer. Although ample effort has been invested into the structural investigation of the chemokine receptors and receptor-chemokine recognition, less is known about endogenous chemokine-induced receptor activation and G-protein coupling. Here we present the cryo-electron microscopy structures of interleukin-8 (IL-8, also known as CXCL8)-activated human CXC chemokine receptor 2 (CXCR2) in complex with G protein, along with a crystal structure of CXCR2 bound to a designed allosteric antagonist. Our results reveal a unique shallow mode of binding between CXCL8 and CXCR2, and also show the interactions between CXCR2 and G protein. Further structural analysis of the inactive and active states of CXCR2 reveals a distinct activation process and the competitive small-molecule antagonism of chemokine receptors. In addition, our results provide insights into how a G-protein-coupled receptor is activated by an endogenous protein molecule, which will assist in the rational development of therapeutics that target the chemokine system for better pharmacological profiles.
History
DepositionDec 3, 2019-
Header (metadata) releaseSep 2, 2020-
Map releaseSep 2, 2020-
UpdateSep 16, 2020-
Current statusSep 16, 2020Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.1708
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.1708
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6lfo
  • Surface level: 0.1708
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_0879.png

Downloads & links

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Map

FileDownload / File: emd_0879.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.38667 Å
Density
Contour LevelBy AUTHOR: 0.1708 / Movie #1: 0.1708
Minimum - Maximum-0.6928249 - 1.1548566
Average (Standard dev.)0.0000918107 (±0.032701112)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 266.24 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.38666666666671.38666666666671.3866666666667
M x/y/z192192192
origin x/y/z0.0000.0000.000
length x/y/z266.240266.240266.240
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS192192192
D min/max/mean-0.6931.1550.000

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Supplemental data

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Sample components

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Entire : Ternary complex of chemokine-monomer, GPCR and G protein

EntireName: Ternary complex of chemokine-monomer, GPCR and G protein
Components
  • Complex: Ternary complex of chemokine-monomer, GPCR and G protein
    • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Protein or peptide: Interleukin-8Interleukin 8
    • Protein or peptide: C-X-C chemokine receptor type 2
    • Protein or peptide: scFv16
  • Ligand: CHOLESTEROL

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Supramolecule #1: Ternary complex of chemokine-monomer, GPCR and G protein

SupramoleculeName: Ternary complex of chemokine-monomer, GPCR and G protein
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#6
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
Molecular weightExperimental: 150 KDa

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Macromolecule #1: Guanine nucleotide-binding protein G(i) subunit alpha-1

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-1
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.283836 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: GCTLSAEDKA AVERSKMIDR NLREDGEKAA REVKLLLLGA GESGKSTIVK QMKIIHEAGY SEEECKQYKA VVYSNTIQSI IAIIRAMGR LKIDFGDSAR ADDARQLFVL AGAAEEGFMT AELAGVIKRL WKDSGVQACF NRSREYQLND SAAYYLNDLD R IAQPNYIP ...String:
GCTLSAEDKA AVERSKMIDR NLREDGEKAA REVKLLLLGA GESGKSTIVK QMKIIHEAGY SEEECKQYKA VVYSNTIQSI IAIIRAMGR LKIDFGDSAR ADDARQLFVL AGAAEEGFMT AELAGVIKRL WKDSGVQACF NRSREYQLND SAAYYLNDLD R IAQPNYIP TQQDVLRTRV KTTGIVETHF TFKDLHFKMF DVGGQRSERK KWIHCFEGVT AIIFCVALSD YDLVLAEDEE MN RMHESMK LFDSICNNKW FTDTSIILFL NKKDLFEEKI KKSPLTICYP EYAGSNTYEE AAAYIQCQFE DLNKRKDTKE IYT HFTCAT DTKNVQFVFD AVTDVIIKNN LKDCGLF

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Macromolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.045629 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: IGRARGFSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSAS QDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT GYLSCCRFLD D NQIVTSSG ...String:
IGRARGFSEL DQLRQEAEQL KNQIRDARKA CADATLSQIT NNIDPVGRIQ MRTRRTLRGH LAKIYAMHWG TDSRLLVSAS QDGKLIIWD SYTTNKVHAI PLRSSWVMTC AYAPSGNYVA CGGLDNICSI YNLKTREGNV RVSRELAGHT GYLSCCRFLD D NQIVTSSG DTTCALWDIE TGQQTTTFTG HTGDVMSLSL APDTRLFVSG ACDASAKLWD VREGMCRQTF TGHESDINAI CF FPNGNAF ATGSDDATCR LFDLRADQEL MTYSHDNIIC GITSVSFSKS GRLLLAGYDD FNCNVWDALK ADRAGVLAGH DNR VSCLGV TDDGMAVATG SWDSFLKIWN

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Macromolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

MacromoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.861143 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFCAI L

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Macromolecule #4: Interleukin-8

MacromoleculeName: Interleukin-8 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 7.600903 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
SAKELRCQCI KTYSKPFHPK FIKELRVIES GPHCANTEII VKLSDGRELC LDPKENWVQR VVEKF

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Macromolecule #5: C-X-C chemokine receptor type 2

MacromoleculeName: C-X-C chemokine receptor type 2 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.798121 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MEDFNMESDS FEDFWKGEDL SNYSYSSTLP PFLLDAAPCE PESLEINKYF VVIIYALVFL LSLLGNSLVM LVILYSRVGR SVTDVYLLN LALADLLFAL TLPIWAASKV NGWIFGTFLC KVVSLLKEVN FYSGILLLAC ISVDRYLAIV HATRTLTQKR Y LVKFICLS ...String:
MEDFNMESDS FEDFWKGEDL SNYSYSSTLP PFLLDAAPCE PESLEINKYF VVIIYALVFL LSLLGNSLVM LVILYSRVGR SVTDVYLLN LALADLLFAL TLPIWAASKV NGWIFGTFLC KVVSLLKEVN FYSGILLLAC ISVDRYLAIV HATRTLTQKR Y LVKFICLS IWGLSLLLAL PVLLFRRTVY SSNVSPACYE DMGNNTANWR MLLRILPQSF GFIVPLLIML FCYGFTLRTL FK AHMGQKH RAMRVIFAVV LIFLLCWLPY NLVLLADTLM RTQVIQETCE RRNHIDRALD ATEILGILHS CLNPLIYAFI GQK FRHGLL KILAIHGLIS KDSLPKDSRP SFVGSSSGHT STTL

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Macromolecule #6: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.784896 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS ...String:
DVQLVESGGG LVQPGGSRKL SCSASGFAFS SFGMHWVRQA PEKGLEWVAY ISSGSGTIYY ADTVKGRFTI SRDDPKNTLF LQMTSLRSE DTAMYYCVRS IYYYGSSPFD FWGQGTTLTV SSGGGGSGGG GSGGGGSDIV MTQATSSVPV TPGESVSISC R SSKSLLHS NGNTYLYWFL QRPGQSPQLL IYRMSNLASG VPDRFSGSGS GTAFTLTISR LEAEDVGVYY CMQHLEYPLT FG AGTKLEL KAAAHHHHHH HH

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Macromolecule #7: CHOLESTEROL

MacromoleculeName: CHOLESTEROL / type: ligand / ID: 7 / Number of copies: 1 / Formula: CLR
Molecular weightTheoretical: 386.654 Da
Chemical component information

ChemComp-CLR:
CHOLESTEROL / Cholesterol

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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

Concentration1 mg/mL
BufferpH: 7.5
GridModel: Homemade / Material: GOLD / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated defocus max: 2.0 µm / Calibrated defocus min: 0.8 µm / Calibrated magnification: 130000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 130000
Specialist opticsEnergy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Dimensions - Width: 7420 pixel / Digitization - Dimensions - Height: 7676 pixel / Number grids imaged: 5 / Number real images: 9004 / Average exposure time: 0.8 sec. / Average electron dose: 8.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 7903150
CTF correctionSoftware - Name: cryoSPARC (ver. 2.11) / Details: Patch CTF refinement
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6n4b

Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2.11)
Final 3D classificationNumber classes: 4 / Avg.num./class: 150000 / Software - Name: cryoSPARC (ver. 2.11)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2.11)
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2.11) / Number images used: 276958

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Atomic model buiding 1

Initial modelPDB ID:

6n4b

RefinementSpace: REAL / Protocol: AB INITIO MODEL / Overall B value: 93.7 / Target criteria: Correlation coefficient
Output model

PDB-6lfo:
Cryo-EM structure of a class A GPCR monomer

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