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- EMDB-30566: Human SECR in complex with an engineered Gs heterotrimer -

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Basic information

Entry
Database: EMDB / ID: EMD-30566
TitleHuman SECR in complex with an engineered Gs heterotrimer
Map data
Sample
  • Complex: SECR-Gs complex
    • Complex: Secretin
      • Protein or peptide: Secretin
    • Complex: Secretin receptor
      • Protein or peptide: Secretin receptor
    • Complex: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Complex: 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(T) subunit beta-1
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: nanobody Nb35
      • Protein or peptide: nanobody Nb35
Function / homology
Function and homology information


secretin receptor activity / digestive hormone activity / positive regulation of somatostatin secretion / negative regulation of gastrin-induced gastric acid secretion / positive regulation of pancreatic juice secretion / regulation of appetite / pancreatic juice secretion / intracellular water homeostasis / positive regulation of lipid catabolic process / positive regulation of cAMP-mediated signaling ...secretin receptor activity / digestive hormone activity / positive regulation of somatostatin secretion / negative regulation of gastrin-induced gastric acid secretion / positive regulation of pancreatic juice secretion / regulation of appetite / pancreatic juice secretion / intracellular water homeostasis / positive regulation of lipid catabolic process / positive regulation of cAMP-mediated signaling / embryonic digestive tract development / G-protein activation / Activation of the phototransduction cascade / Glucagon-type ligand receptors / Thromboxane signalling through TP receptor / Sensory perception of sweet, bitter, and umami (glutamate) taste / G beta:gamma signalling through PI3Kgamma / G beta:gamma signalling through CDC42 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Ca2+ pathway / G protein-coupled peptide receptor activity / G alpha (z) signalling events / Vasopressin regulates renal water homeostasis via Aquaporins / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / Adrenaline,noradrenaline inhibits insulin secretion / ADP signalling through P2Y purinoceptor 12 / G alpha (q) signalling events / G alpha (i) signalling events / Thrombin signalling through proteinase activated receptors (PARs) / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / G alpha (12/13) signalling events / G beta:gamma signalling through BTK / alkylglycerophosphoethanolamine phosphodiesterase activity / ADP signalling through P2Y purinoceptor 12 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Thrombin signalling through proteinase activated receptors (PARs) / Ca2+ pathway / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / G alpha (q) signalling events / photoreceptor outer segment membrane / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / spectrin binding / Vasopressin regulates renal water homeostasis via Aquaporins / diet induced thermogenesis / cytoplasmic microtubule / peptide hormone binding / PKA activation in glucagon signalling / hair follicle placode formation / mu-type opioid receptor binding / photoreceptor outer segment / developmental growth / corticotropin-releasing hormone receptor 1 binding / intracellular transport / D1 dopamine receptor binding / Hedgehog 'off' state / beta-2 adrenergic receptor binding / adenylate cyclase-activating adrenergic receptor signaling pathway / cardiac muscle cell apoptotic process / activation of adenylate cyclase activity / adenylate cyclase activator activity / photoreceptor inner segment / response to nutrient levels / trans-Golgi network membrane / G protein-coupled receptor binding / hippocampus development / ionotropic glutamate receptor binding / insulin-like growth factor receptor binding / G-protein beta/gamma-subunit complex binding / regulation of synaptic plasticity / bone development / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / adenylate cyclase-activating G protein-coupled receptor signaling pathway / hormone activity / brain development / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / cognition / platelet aggregation / 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
Similarity search - Function
GPCR, family 2, secretin receptor / Secretin precursor / : / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / G-protein coupled receptors family 2 signature 1. / Hormone receptor domain / GPCR, family 2, extracellular hormone receptor domain ...GPCR, family 2, secretin receptor / Secretin precursor / : / Glucagon/GIP/secretin/VIP / Peptide hormone / Glucagon / GIP / secretin / VIP family signature. / Glucagon like hormones / G-protein coupled receptors family 2 signature 1. / Hormone receptor domain / GPCR, family 2, extracellular hormone receptor domain / G-protein coupled receptors family 2 profile 1. / Domain present in hormone receptors / GPCR family 2, extracellular hormone receptor domain superfamily / G-protein coupled receptors family 2 signature 2. / GPCR, family 2, secretin-like, conserved site / GPCR, family 2, secretin-like / 7 transmembrane receptor (Secretin family) / GPCR, family 2-like / G-protein coupled receptors family 2 profile 2. / G-protein alpha subunit, group S / 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 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 / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Secretin / Secretin receptor / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Guanine nucleotide-binding protein G(s) subunit alpha isoforms short / Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
Similarity search - Component
Biological speciesHomo sapiens (human) / Rattus norvegicus (Norway rat) / Bos taurus (cattle) / unidentified (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsFukuhara S / Kobayashi K / Kusakizako T / Shihoya W / Nureki O
CitationJournal: Biochem Biophys Res Commun / Year: 2020
Title: Structure of the human secretin receptor coupled to an engineered heterotrimeric G protein.
Authors: Satoshi Fukuhara / Kazuhiro Kobayashi / Tsukasa Kusakizako / Wataru Iida / Masahiko Kato / Wataru Shihoya / Osamu Nureki /
Abstract: Secretin is a gastrointestinal hormone that exerts multiple physiological functions via activation of the secretin receptor (SECR). SECR belongs to the class B G-protein-coupled receptors and is ...Secretin is a gastrointestinal hormone that exerts multiple physiological functions via activation of the secretin receptor (SECR). SECR belongs to the class B G-protein-coupled receptors and is involved in various processes, such as regulation of the pH of the duodenal content, food intake, and water homeostasis. Here, we report a cryo-electron microscopy structure of human SECR bound to secretin and an engineered Gs heterotrimer. The structure revealed the basic architecture of SECR and the secretin binding mode. A structural comparison of the SECR and PAC1R transmembrane domains revealed that transmembrane helices 1 and 2 play a prominent role in secretin recognition. Moreover, the extracellular domain of SECR is perpendicular to the TMD, unlike that of PAC1R. This comparison revealed the diverged peptide recognition mechanisms of these receptors, which belong to the same subgroup. Our structural information will facilitate drug discovery research for clinical applications.
History
DepositionSep 20, 2020-
Header (metadata) releaseNov 4, 2020-
Map releaseNov 4, 2020-
UpdateDec 30, 2020-
Current statusDec 30, 2020Processing site: PDBj / Status: Released

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Structure visualization

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  • Atomic models: PDB-7d3s
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_30566.png

Downloads & links

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Map

FileDownload / File: emd_30566.map.gz / Format: CCP4 / Size: 35.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.10667 Å
Density
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.19409442 - 0.29766175
Average (Standard dev.)0.00016999613 (±0.006470991)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions210210210
Spacing210210210
CellA=B=C: 232.40071 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.10667142857141.10667142857141.1066714285714
M x/y/z210210210
origin x/y/z0.0000.0000.000
length x/y/z232.401232.401232.401
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS210210210
D min/max/mean-0.1940.2980.000

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Supplemental data

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Half map: #2

Fileemd_30566_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_30566_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : SECR-Gs complex

EntireName: SECR-Gs complex
Components
  • Complex: SECR-Gs complex
    • Complex: Secretin
      • Protein or peptide: Secretin
    • Complex: Secretin receptor
      • Protein or peptide: Secretin receptor
    • Complex: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
      • Protein or peptide: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
    • Complex: 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(T) subunit beta-1
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
      • Protein or peptide: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: nanobody Nb35
      • Protein or peptide: nanobody Nb35

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Supramolecule #1: SECR-Gs complex

SupramoleculeName: SECR-Gs complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: Secretin

SupramoleculeName: Secretin / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Recombinant expressionOrganism: Homo sapiens (human)

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Supramolecule #3: Secretin receptor

SupramoleculeName: Secretin receptor / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Recombinant expressionOrganism: Homo sapiens (human)

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Supramolecule #4: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

SupramoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3

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Supramolecule #5: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: complex / ID: 5 / Parent: 1 / Macromolecule list: #4
Recombinant expressionOrganism: Rattus norvegicus (Norway rat)

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Supramolecule #6: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: complex / ID: 6 / Parent: 1 / Macromolecule list: #5
Recombinant expressionOrganism: Bos taurus (cattle)

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Supramolecule #7: nanobody Nb35

SupramoleculeName: nanobody Nb35 / type: complex / ID: 7 / Parent: 1 / Macromolecule list: #6
Recombinant expressionOrganism: unidefined (others)

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Macromolecule #1: Secretin

MacromoleculeName: Secretin / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 3.045436 KDa
SequenceString:
HSDGTFTSEL SRLREGARLQ RLLQGLV

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Macromolecule #2: Secretin receptor

MacromoleculeName: Secretin receptor / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.742422 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DYKDDDDAMG HSTGALPRLC DVLQVLWEEQ DQCLQELSRE QTGDLGTEQP VPGCEGMWDN ISCWPSSVPG RMVEVECPRF LRMLTSRNG SLFRNCTQDG WSETFPRPNL ACGVNVNDSS NEKRHSYLLK LKVMYTVGYS SSLVMLLVAL GILCAFRRLH C TRNYIHMH ...String:
DYKDDDDAMG HSTGALPRLC DVLQVLWEEQ DQCLQELSRE QTGDLGTEQP VPGCEGMWDN ISCWPSSVPG RMVEVECPRF LRMLTSRNG SLFRNCTQDG WSETFPRPNL ACGVNVNDSS NEKRHSYLLK LKVMYTVGYS SSLVMLLVAL GILCAFRRLH C TRNYIHMH LFVSFILRAL SNFIKDAVLF SSDDVTYCDA HRAGCKLVMV LFQYCIMANY SWLLVEGLYL HTLLAISFFS ER KYLQGFV AFGWGSPAIF VALWAIARHF LEDVGCWDIN ANASIWWIIR GPVILSILIN FILFINILRI LMRKLRTQET RGN EVSHYK RLARSTLLLI PLFGIHYIVF AFSPEDAMEI QLFFELALGS FQGLVVAVLY CFLNGEVQLE VQKKWQQWHL REFP LHPVA SFSNSTKASH LEQSQGTCRT SIIENLYFG

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Macromolecule #3: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

MacromoleculeName: Guanine nucleotide-binding protein G(s) subunit alpha isoforms short
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 44.255664 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: GNSKTEDQRN EEKAQREANK KIEKQLQKDK QVYRATHRLL LLGADNSGKS TIVKQMRIYH VNGFNGEGGE EDPQAARSNS DGEKATKVQ DIKNNLKEAI ETIVAAMSNL VPPVELANPE NQFRVDYILS VMNVPDFDFP PEFYEHAKAL WEDEGVRACY E RSNEYQLI ...String:
GNSKTEDQRN EEKAQREANK KIEKQLQKDK QVYRATHRLL LLGADNSGKS TIVKQMRIYH VNGFNGEGGE EDPQAARSNS DGEKATKVQ DIKNNLKEAI ETIVAAMSNL VPPVELANPE NQFRVDYILS VMNVPDFDFP PEFYEHAKAL WEDEGVRACY E RSNEYQLI DCAQYFLDKI DVIKQADYVP SDQDLLRCRV LTSGIFETKF QVDKVNFHMF DVGGQRDERR KWIQCFNDVT AI IFVVDSS DYNRLQEALN LFKSIWNNRW LRTISVILFL NKQDLLAEKV LAGKSKIEDY FPEFARYTTP EDATPEPGED PRV TRAKYF IRDEFLRIST ASGDGRHYCY PHFTCAVDTE NARRIFNDCR DIIQRMHLRQ YELL

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Macromolecule #4: 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: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Rattus norvegicus (Norway rat)
Molecular weightTheoretical: 38.744371 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI ...String:
MHHHHHHGSL LQSELDQLRQ EAEQLKNQIR DARKACADAT LSQITNNIDP VGRIQMRTRR TLRGHLAKIY AMHWGTDSRL LVSASQDGK LIIWDSYTTN KVHAIPLRSS WVMTCAYAPS GNYVACGGLD NICSIYNLKT REGNVRVSRE LAGHTGYLSC C RFLDDNQI VTSSGDTTCA LWDIETGQQT TTFTGHTGDV MSLSLAPDTR LFVSGACDAS AKLWDVREGM CRQTFTGHES DI NAICFFP NGNAFATGSD DATCRLFDLR ADQELMTYSH DNIICGITSV SFSKSGRLLL AGYDDFNCNV WDALKADRAG VLA GHDNRV SCLGVTDDGM AVATGSWDSF LKIWN

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Macromolecule #5: 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: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle)
Molecular weightTheoretical: 7.547685 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MASNNTASIA QARKLVEQLK MEANIDRIKV SKAAADLMAY CEAHAKEDPL LTPVPASENP FREKKFFS

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Macromolecule #6: nanobody Nb35

MacromoleculeName: nanobody Nb35 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: unidentified (others)
Molecular weightTheoretical: 15.015728 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
MGQVQLQESG GGLVQPGGSL RLSCAASGFT FSNYKMNWVR QAPGKGLEWV SDISQSGASI SYTGSVKGRF TISRDNAKNT LYLQMNSLK PEDTAVYYCA RCPAPFTRDC FDVTSTTYAY RGQGTQVTVS SLHHHHHH

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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

Concentration5.4 mg/mL
BufferpH: 8
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number real images: 2142 / Average electron dose: 50.8 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 617465
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

5vai

RefinementProtocol: OTHER
Output model

PDB-7d3s:
Human SECR in complex with an engineered Gs heterotrimer

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