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- EMDB-33103: Cryo-EM structure of human galanin receptor 2 -

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Basic information

Entry
Database: EMDB / ID: EMD-33103
TitleCryo-EM structure of human galanin receptor 2
Map datasharp map
Sample
  • Complex: Human galanin receptor 2 complex with Gq heterotrimer
    • Complex: Human galanin receptor 2
      • Protein or peptide: Galanin receptor type 2
      • Protein or peptide: Guanine nucleotide-binding protein G(q) subunit alpha
      • 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
    • Complex: scFv16
      • Protein or peptide: scFv16
    • Complex: Galanin
      • Protein or peptide: Galanin
KeywordsGPCR / MEMBRANE PROTEIN / GALANIN
Function / homology
Function and homology information


galanin-activated signaling pathway / galanin receptor binding / type 1 galanin receptor binding / type 2 galanin receptor binding / type 3 galanin receptor binding / galanin receptor activity / positive regulation of large conductance calcium-activated potassium channel activity / positive regulation of timing of catagen / positive regulation of cortisol secretion / regulation of glucocorticoid metabolic process ...galanin-activated signaling pathway / galanin receptor binding / type 1 galanin receptor binding / type 2 galanin receptor binding / type 3 galanin receptor binding / galanin receptor activity / positive regulation of large conductance calcium-activated potassium channel activity / positive regulation of timing of catagen / positive regulation of cortisol secretion / regulation of glucocorticoid metabolic process / inositol phosphate metabolic process / negative regulation of lymphocyte proliferation / phosphatidylinositol metabolic process / neuropeptide hormone activity / feeding behavior / neuropeptide binding / insulin secretion / peptide hormone binding / response to immobilization stress / neuropeptide signaling pathway / muscle contraction / cAMP-mediated signaling / protein kinase A signaling / Peptide ligand-binding receptors / secretory granule / response to insulin / Olfactory Signaling Pathway / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / Activation of the phototransduction cascade / adenylate cyclase-activating G protein-coupled receptor signaling pathway / G beta:gamma signalling through PLC beta / Presynaptic function of Kainate receptors / cilium / Thromboxane signalling through TP receptor / G protein-coupled acetylcholine receptor signaling pathway / G-protein activation / Activation of G protein gated Potassium channels / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / Prostacyclin signalling through prostacyclin receptor / Glucagon signaling in metabolic regulation / G beta:gamma signalling through CDC42 / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Sensory perception of sweet, bitter, and umami (glutamate) taste / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / photoreceptor disc membrane / Glucagon-type ligand receptors / Adrenaline,noradrenaline inhibits insulin secretion / Vasopressin regulates renal water homeostasis via Aquaporins / response to estrogen / G alpha (z) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / cellular response to catecholamine stimulus / ADORA2B mediated anti-inflammatory cytokines production / sensory perception of taste / ADP signalling through P2Y purinoceptor 1 / G beta:gamma signalling through PI3Kgamma / adenylate cyclase-activating dopamine receptor signaling pathway / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / GPER1 signaling / cellular response to prostaglandin E stimulus / neuron projection development / Inactivation, recovery and regulation of the phototransduction cascade / G-protein beta-subunit binding / heterotrimeric G-protein complex / G alpha (12/13) signalling events / extracellular vesicle / signaling receptor complex adaptor activity / Thrombin signalling through proteinase activated receptors (PARs) / GTPase binding / retina development in camera-type eye / Ca2+ pathway / phospholipase C-activating G protein-coupled receptor signaling pathway / positive regulation of cytosolic calcium ion concentration / G alpha (i) signalling events / fibroblast proliferation / G alpha (s) signalling events / G alpha (q) signalling events / Ras protein signal transduction / cell population proliferation / Extra-nuclear estrogen signaling / learning or memory / cell surface receptor signaling pathway / positive regulation of apoptotic process / response to xenobiotic stimulus / G protein-coupled receptor signaling pathway / lysosomal membrane / GTPase activity / neuronal cell body / synapse / protein-containing complex binding / signal transduction / positive regulation of transcription by RNA polymerase II / extracellular space / extracellular exosome / extracellular region / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Galanin receptor 2 / Galanin receptor family / Galanin / Galanin precursor / Galanin message associated peptide (GMAP) / Galanin / Galanin message associated peptide (GMAP) / Galanin signature. / Galanin / Serpentine type 7TM GPCR chemoreceptor Srsx ...Galanin receptor 2 / Galanin receptor family / Galanin / Galanin precursor / Galanin message associated peptide (GMAP) / Galanin / Galanin message associated peptide (GMAP) / Galanin signature. / Galanin / Serpentine type 7TM GPCR chemoreceptor Srsx / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / 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. / 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
Galanin receptor type 2 / Galanin peptides / 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
Similarity search - Component
Biological speciesHomo sapiens (human) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.11 Å
AuthorsIshimoto N / Kita S / Park SY
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: PLoS Biol / Year: 2022
Title: Structure of the human galanin receptor 2 bound to galanin and Gq reveals the basis of ligand specificity and how binding affects the G-protein interface.
Authors: Yunseok Heo / Naito Ishimoto / Ye-Eun Jeon / Ji-Hye Yun / Mio Ohki / Yuki Anraku / Mina Sasaki / Shunsuke Kita / Hideo Fukuhara / Tatsuya Ikuta / Kouki Kawakami / Asuka Inoue / Katsumi ...Authors: Yunseok Heo / Naito Ishimoto / Ye-Eun Jeon / Ji-Hye Yun / Mio Ohki / Yuki Anraku / Mina Sasaki / Shunsuke Kita / Hideo Fukuhara / Tatsuya Ikuta / Kouki Kawakami / Asuka Inoue / Katsumi Maenaka / Jeremy R H Tame / Weontae Lee / Sam-Yong Park /
Abstract: Galanin is a neuropeptide expressed in the central and peripheral nervous systems, where it regulates various processes including neuroendocrine release, cognition, and nerve regeneration. Three G- ...Galanin is a neuropeptide expressed in the central and peripheral nervous systems, where it regulates various processes including neuroendocrine release, cognition, and nerve regeneration. Three G-protein coupled receptors (GPCRs) for galanin have been discovered, which is the focus of efforts to treat diseases including Alzheimer's disease, anxiety, and addiction. To understand the basis of the ligand preferences of the receptors and to assist structure-based drug design, we used cryo-electron microscopy (cryo-EM) to solve the molecular structure of GALR2 bound to galanin and a cognate heterotrimeric G-protein, providing a molecular view of the neuropeptide binding site. Mutant proteins were assayed to help reveal the basis of ligand specificity, and structural comparison between the activated GALR2 and inactive hβ2AR was used to relate galanin binding to the movements of transmembrane (TM) helices and the G-protein interface.
History
DepositionMar 21, 2022-
Header (metadata) releaseJul 13, 2022-
Map releaseJul 13, 2022-
UpdateNov 6, 2024-
Current statusNov 6, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33103.png

Downloads & links

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Map

FileDownload / File: emd_33103.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationsharp map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.12 Å/pix.
x 240 pix.
= 268. Å		1.12 Å/pix.
x 240 pix.
= 268. Å		1.12 Å/pix.
x 240 pix.
= 268. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.11667 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.26
Minimum - Maximum-1.8493583 - 2.6497397
Average (Standard dev.)-0.00073055975 (±0.047740012)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 268.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_33103_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half map 1

Fileemd_33103_half_map_1.map
Annotationhalf map 1
Projections & Slices
AxesZYX

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Density Histograms

Histogram

Histogram (log scale)

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Half map: half map 2

Fileemd_33103_half_map_2.map
Annotationhalf map 2
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : Human galanin receptor 2 complex with Gq heterotrimer

EntireName: Human galanin receptor 2 complex with Gq heterotrimer
Components
  • Complex: Human galanin receptor 2 complex with Gq heterotrimer
    • Complex: Human galanin receptor 2
      • Protein or peptide: Galanin receptor type 2
      • Protein or peptide: Guanine nucleotide-binding protein G(q) subunit alpha
      • 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
    • Complex: scFv16
      • Protein or peptide: scFv16
    • Complex: Galanin
      • Protein or peptide: Galanin

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Supramolecule #1: Human galanin receptor 2 complex with Gq heterotrimer

SupramoleculeName: Human galanin receptor 2 complex with Gq heterotrimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 150 KDa

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Supramolecule #2: Human galanin receptor 2

SupramoleculeName: Human galanin receptor 2 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#4
Source (natural)Organism: Mus musculus (house mouse)

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Supramolecule #3: scFv16

SupramoleculeName: scFv16 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #5

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Supramolecule #4: Galanin

SupramoleculeName: Galanin / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #6

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Macromolecule #1: Galanin receptor type 2

MacromoleculeName: Galanin receptor type 2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 41.744082 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MNVSGCPGAG NASQAGGGGG WHPEAVIVPL LFALIFLVGT VGNTLVLAVL LRGGQAVSTT NLFILNLGVA DLCFILCCVP FQATIYTLD GWVFGSLLCK AVHFLIFLTM HASSFTLAAV SLDRYLAIRY PLHSRELRTP RNALAAIGLI WGLSLLFSGP Y LSYYRQSQ ...String:
MNVSGCPGAG NASQAGGGGG WHPEAVIVPL LFALIFLVGT VGNTLVLAVL LRGGQAVSTT NLFILNLGVA DLCFILCCVP FQATIYTLD GWVFGSLLCK AVHFLIFLTM HASSFTLAAV SLDRYLAIRY PLHSRELRTP RNALAAIGLI WGLSLLFSGP Y LSYYRQSQ LANLTVCHPA WSAPRRRAMD ICTFVFSYLL PVLVLGLTYA RTLRYLWRAV DPVAAGSGAR RAKRKVTRMI LI VAALFCL CWMPHHALIL CVWFGQFPLT RATYALRILS HLVSYANSCV NPIVYALVSK HFRKGFRTIC AGLLGRAPGR ASG RVCAAA RGTHSGSVLE RESSDLLHMS EAAGALRPCP GASQPCILEP CPGPSWQGPK AGDSILTVDV A

UniProtKB: Galanin receptor type 2

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Macromolecule #2: Guanine nucleotide-binding protein G(q) subunit alpha

MacromoleculeName: Guanine nucleotide-binding protein G(q) subunit alpha / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.084832 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA ...String:
MGSTVSAEDK AAAERSKMID KNLREDGEKA RRTLRLLLLG ADNSGKSTIV KQMRILHGGS GGSGGTSGIF ETKFQVDKVN FHMFDVGGQ RDERRKWIQC FNDVTAIIFV VDSSDYNRLQ EALNDFKSIW NNRWLRTISV ILFLNKQDLL AEKVLAGKSK I EDYFPEFA RYTTPEDATP EPGEDPRVTR AKYFIRKEFV DISTASGDGR HICYPHFTCA VDTENARRIF NDCKDIILQM NL REYNLV

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Macromolecule #3: 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: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.41693 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL ...String:
MSELDQLRQE AEQLKNQIRD ARKACADATL SQITNNIDPV GRIQMRTRRT LRGHLAKIYA MHWGTDSRLL VSASQDGKLI IWDSYTTNK VHAIPLRSSW VMTCAYAPSG NYVACGGLDN ICSIYNLKTR EGNVRVSREL AGHTGYLSCC RFLDDNQIVT S SGDTTCAL WDIETGQQTT TFTGHTGDVM SLSLAPDTRL FVSGACDASA KLWDVREGMC RQTFTGHESD INAICFFPNG NA FATGSDD ATCRLFDLRA DQELMTYSHD NIICGITSVS FSKSGRLLLA GYDDFNCNVW DALKADRAGV LAGHDNRVSC LGV TDDGMA VATGSWDSFL KIWN

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

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Macromolecule #4: 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: 4 / 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

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

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Macromolecule #5: scFv16

MacromoleculeName: scFv16 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 27.474574 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 KAAAENLYFQ

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Macromolecule #6: Galanin

MacromoleculeName: Galanin / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 3.161446 KDa
SequenceString:
GWTLNSAGYL LGPHAVGNHR SFSDKNGLTS

UniProtKB: Galanin peptides

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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

Concentration1.5 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
20.0 mMHEPES2-[4-(2-Hydroxyethyl)-1-piperazinyl]ethanesulfonic acid
100.0 mMNaClsodium chloride
1.0 mMMgCl2magnesium chloride
0.5 mMTCEPtris(2-carboxyethyl)phosphine
0.001 %(w/v)LMNGLauryl Maltose Neopentyl Glycol
0.0001 %(w/v)CHScholesteryl homosuccinate
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 7216 / Average exposure time: 4.7 sec. / Average electron dose: 53.17 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 130000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 2666499
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7ezm

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.11 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 479312
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:

7ezm


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL
Output model

PDB-7xbd:
Cryo-EM structure of human galanin receptor 2

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