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- EMDB-53264: Ternary complex of the human 20S proteasome in complex with Impor... -

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Basic information

Entry
Database: EMDB / ID: EMD-53264
TitleTernary complex of the human 20S proteasome in complex with Importin-9 and two homodimers of Akirin-2 - focussed refinement on the alpha subunits, Ipo-9 and Ak2
Map data
Sample
  • Complex: Ternary complex of the human 20S proteasome in complex with two dimers of Akirin-2 and Importin-9
    • Protein or peptide: Akirin-2
    • Protein or peptide: Proteasome subunit alpha type-3
    • Protein or peptide: Proteasome subunit alpha type-6
    • Protein or peptide: Proteasome subunit alpha type-2
    • Protein or peptide: Proteasome subunit alpha type-4
    • Protein or peptide: Proteasome subunit alpha type-7
    • Protein or peptide: Proteasome subunit alpha type-5
    • Protein or peptide: Proteasome subunit alpha type-1
    • Protein or peptide: Importin-9
Keywords20S proteasome / 20S / proteasome / nuclear iport / akirin / akirin2 / importin 9 / importin / PROTEIN TRANSPORT
Function / homology
Function and homology information


proteasome localization / regulation of muscle cell differentiation / positive regulation of B cell activation / histone chaperone activity / nuclear protein quality control by the ubiquitin-proteasome system / positive regulation of adaptive immune response / purine ribonucleoside triphosphate binding / embryo development ending in birth or egg hatching / positive regulation of innate immune response / Regulation of ornithine decarboxylase (ODC) ...proteasome localization / regulation of muscle cell differentiation / positive regulation of B cell activation / histone chaperone activity / nuclear protein quality control by the ubiquitin-proteasome system / positive regulation of adaptive immune response / purine ribonucleoside triphosphate binding / embryo development ending in birth or egg hatching / positive regulation of innate immune response / Regulation of ornithine decarboxylase (ODC) / nuclear import signal receptor activity / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / myofibril / immune system process / NF-kappaB binding / proteasome core complex, alpha-subunit complex / transcription repressor complex / proteasome complex / : / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / transcription coregulator activity / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / negative regulation of inflammatory response to antigenic stimulus / Degradation of DVL / P-body / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of AXIN / lipopolysaccharide binding / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / G2/M Checkpoints / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Regulation of RUNX3 expression and activity / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / MAPK6/MAPK4 signaling / cerebral cortex development / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / positive regulation of interleukin-6 production / small GTPase binding / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / nuclear matrix / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / protein import into nucleus / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / UCH proteinases / KEAP1-NFE2L2 pathway / nuclear envelope / Downstream TCR signaling / Antigen processing: Ubiquitination & Proteasome degradation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / regulation of inflammatory response / secretory granule lumen / endopeptidase activity / histone binding / response to lipopolysaccharide / protein-macromolecule adaptor activity / ficolin-1-rich granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / adaptive immune response / positive regulation of canonical NF-kappaB signal transduction / defense response to bacterium
Similarity search - Function
: / Importin-9 central HEAT repeats / Akirin / Importin-beta N-terminal domain / Importin-beta N-terminal domain / Importin-beta N-terminal domain profile. / Importin-beta, N-terminal domain / Proteasome subunit alpha 1 / Proteasome subunit alpha5 / Proteasome subunit alpha6 ...: / Importin-9 central HEAT repeats / Akirin / Importin-beta N-terminal domain / Importin-beta N-terminal domain / Importin-beta N-terminal domain profile. / Importin-beta, N-terminal domain / Proteasome subunit alpha 1 / Proteasome subunit alpha5 / Proteasome subunit alpha6 / Proteasome beta-type subunit, conserved site / Proteasome subunit A N-terminal signature / Proteasome alpha-type subunits signature. / Proteasome alpha-subunit, N-terminal domain / Proteasome subunit A N-terminal signature Add an annotation / : / Proteasome alpha-type subunit / Proteasome alpha-type subunit profile. / Proteasome subunit / Proteasome, subunit alpha/beta / Nucleophile aminohydrolases, N-terminal / Armadillo-like helical / Armadillo-type fold
Similarity search - Domain/homology
Proteasome subunit alpha type-7 / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 / Proteasome subunit alpha type-3 / Proteasome subunit alpha type-4 / Proteasome subunit alpha type-5 / Proteasome subunit alpha type-6 / Akirin-2 / Importin-9
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsBrunner HL / Grundmann L / David H
Funding supportEuropean Union, Austria, 2 items
OrganizationGrant numberCountry
H2020 Marie Curie Actions of the European Commission847548European Union
Austrian Science Fund10.55776/F79 Austria
CitationJournal: To Be Published
Title: A multivalent adaptor mechanism drives the nuclear import of proteasomes
Authors: Brunner H / Kalis RW / Grundmann L / Hodakova Z / Koskova Z / Grishkovskaya I / de Almeida M / Hinterndorfer M / Hoefflin S / Andersch F / Kotisch H / Dickmanns A / Cuylen-Haering S / Zuber J / Haselbach D
History
DepositionMar 26, 2025-
Header (metadata) releaseJan 28, 2026-
Map releaseJan 28, 2026-
UpdateJan 28, 2026-
Current statusJan 28, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_53264.png

Downloads & links

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Map

FileDownload / File: emd_53264.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
1.43 Å/pix.
x 300 pix.
= 429. Å		1.43 Å/pix.
x 300 pix.
= 429. Å		1.43 Å/pix.
x 300 pix.
= 429. Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.43 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 0.0313
Minimum - Maximum-0.013655666 - 1.8800604
Average (Standard dev.)0.0010453782 (±0.022466542)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 428.99997 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_53264_msk_1.map
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Additional map: #1

Fileemd_53264_additional_1.map
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Half map: #2

Fileemd_53264_half_map_1.map
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Half map: #1

Fileemd_53264_half_map_2.map
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Sample components

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Entire : Ternary complex of the human 20S proteasome in complex with two d...

EntireName: Ternary complex of the human 20S proteasome in complex with two dimers of Akirin-2 and Importin-9
Components
  • Complex: Ternary complex of the human 20S proteasome in complex with two dimers of Akirin-2 and Importin-9
    • Protein or peptide: Akirin-2
    • Protein or peptide: Proteasome subunit alpha type-3
    • Protein or peptide: Proteasome subunit alpha type-6
    • Protein or peptide: Proteasome subunit alpha type-2
    • Protein or peptide: Proteasome subunit alpha type-4
    • Protein or peptide: Proteasome subunit alpha type-7
    • Protein or peptide: Proteasome subunit alpha type-5
    • Protein or peptide: Proteasome subunit alpha type-1
    • Protein or peptide: Importin-9

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Supramolecule #1: Ternary complex of the human 20S proteasome in complex with two d...

SupramoleculeName: Ternary complex of the human 20S proteasome in complex with two dimers of Akirin-2 and Importin-9
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #2-#9, #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Importin-9

MacromoleculeName: Importin-9 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 116.06232 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MAAAAAAGAA SGLPGPVAQG LKEALVDTLT GILSPVQEVR AAAEEQIKVL EVTEEFGVHL AELTVDPQGA LAIRQLASVI LKQYVETHW CAQSEKFRPP ETTERAKIVI RELLPNGLRE SISKVRSSVA YAVSAIAHWD WPEAWPQLFN LLMEMLVSGD L NAVHGAMR ...String:
MAAAAAAGAA SGLPGPVAQG LKEALVDTLT GILSPVQEVR AAAEEQIKVL EVTEEFGVHL AELTVDPQGA LAIRQLASVI LKQYVETHW CAQSEKFRPP ETTERAKIVI RELLPNGLRE SISKVRSSVA YAVSAIAHWD WPEAWPQLFN LLMEMLVSGD L NAVHGAMR VLTEFTREVT DTQMPLVAPV ILPEMYKIFT MAEVYGIRTR SRAVEIFTTC AHMICNMEEL EKGAAKVLIF PV VQQFTEA FVQALQIPDG PTSDSGFKME VLKAVTALVK NFPKHMVSSM QQILPIVWNT LTESAAFYVR TEVNYTEEVE DPV DSDGEV LGFENLVFSI FEFVHALLEN SKFKSTVKKA LPELIYYIIL YMQITEEQIK VWTANPQQFV EDEDDDTFSY TVRI AAQDL LLAVATDFQN ESAAALAAAA TRHLQEAEQT KNSGTEHWWK IHEACMLALG SVKAIITDSV KNGRIHFDMH GFLTN VILA DLNLSVSPFL LGRALWAASR FTVAMSPELI QQFLQATVSG LHETQPPSVR ISAVRAIWGY CDQLKVSEST HVLQPF LPS ILDGLIHLAA QFSSEVLNLV METLCIVCTV DPEFTASMES KICPFTIAIF LKYSNDPVVA SLAQDIFKEL SQIEACQ GP MQMRLIPTLV SIMQAPADKI PAGLCATAID ILTTVVRNTK PPLSQLLICQ AFPAVAQCTL HTDDNATMQN GGECLRAY V SVTLEQVAQW HDEQGHNGLW YVMQVVSQLL DPRTSEFTAA FVGRLVSTLI SKAGRELGEN LDQILRAILS KMQQAETLS VMQSLIMVFA HLVHTQLEPL LEFLCSLPGP TGKPALEFVM AEWTSRQHLF YGQYEGKVSS VALCKLLQHG INADDKRLQD IRVKGEEIY SMDEGIRTRS KSAKNPERWT NIPLLVKILK LIINELSNVM EANAARQATP AEWSQDDSND MWEDQEEEEE E EEDGLAGQ LLSDILATSK YEEDYYEDDE EDDPDALKDP LYQIDLQAYL TDFLCQFAQQ PCYIMFSGHL NDNERRVLQT IG I

UniProtKB: Importin-9

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Macromolecule #2: Akirin-2

MacromoleculeName: Akirin-2 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 22.525582 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: MACGATLKRT LDFDPLLSPA SPKRRRCAPL SAPTSAAASP LSAAAATAAS FSAAAASPQK YLRMEPSPFG DVSSRLTTEQ ILYNIKQEY KRMQKRRHLE TSFQQTDPCC TSDAQPHAFL LSGPASPGTS SAASSPLKKE QPLFTLRQVG MICERLLKER E EKVREEYE ...String:
MACGATLKRT LDFDPLLSPA SPKRRRCAPL SAPTSAAASP LSAAAATAAS FSAAAASPQK YLRMEPSPFG DVSSRLTTEQ ILYNIKQEY KRMQKRRHLE TSFQQTDPCC TSDAQPHAFL LSGPASPGTS SAASSPLKKE QPLFTLRQVG MICERLLKER E EKVREEYE EILNTKLAEQ YDAFVKFTHD QIMRRYGEQP ASYVS

UniProtKB: Akirin-2

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Macromolecule #3: Proteasome subunit alpha type-3

MacromoleculeName: Proteasome subunit alpha type-3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.469252 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSSIGTGYDL SASTFSPDGR VFQVEYAMKA VENSSTAIGI RCKDGVVFGV EKLVLSKLYE EGSNKRLFNV DRHVGMAVAG LLADARSLA DIAREEASNF RSNFGYNIPL KHLADRVAMY VHAYTLYSAV RPFGCSFMLG SYSVNDGAQL YMIDPSGVSY G YWGCAIGK ...String:
MSSIGTGYDL SASTFSPDGR VFQVEYAMKA VENSSTAIGI RCKDGVVFGV EKLVLSKLYE EGSNKRLFNV DRHVGMAVAG LLADARSLA DIAREEASNF RSNFGYNIPL KHLADRVAMY VHAYTLYSAV RPFGCSFMLG SYSVNDGAQL YMIDPSGVSY G YWGCAIGK ARQAAKTEIE KLQMKEMTCR DIVKEVAKII YIVHDEVKDK AFELELSWVG ELTNGRHEIV PKDIREEAEK YA KESLKEE DESDDDNM

UniProtKB: Proteasome subunit alpha type-3

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Macromolecule #4: Proteasome subunit alpha type-6

MacromoleculeName: Proteasome subunit alpha type-6 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.432459 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSRGSSAGFD RHITIFSPEG RLYQVEYAFK AINQGGLTSV AVRGKDCAVI VTQKKVPDKL LDSSTVTHLF KITENIGCVM TGMTADSRS QVQRARYEAA NWKYKYGYEI PVDMLCKRIA DISQVYTQNA EMRPLGCCMI LIGIDEEQGP QVYKCDPAGY Y CGFKATAA ...String:
MSRGSSAGFD RHITIFSPEG RLYQVEYAFK AINQGGLTSV AVRGKDCAVI VTQKKVPDKL LDSSTVTHLF KITENIGCVM TGMTADSRS QVQRARYEAA NWKYKYGYEI PVDMLCKRIA DISQVYTQNA EMRPLGCCMI LIGIDEEQGP QVYKCDPAGY Y CGFKATAA GVKQTESTSF LEKKVKKKFD WTFEQTVETA ITCLSTVLSI DFKPSEIEVG VVTVENPKFR ILTEAEIDAH LV ALAERD

UniProtKB: Proteasome subunit alpha type-6

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Macromolecule #5: Proteasome subunit alpha type-2

MacromoleculeName: Proteasome subunit alpha type-2 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 25.927535 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MAERGYSFSL TTFSPSGKLV QIEYALAAVA GGAPSVGIKA ANGVVLATEK KQKSILYDER SVHKVEPITK HIGLVYSGMG PDYRVLVHR ARKLAQQYYL VYQEPIPTAQ LVQRVASVMQ EYTQSGGVRP FGVSLLICGW NEGRPYLFQS DPSGAYFAWK A TAMGKNYV ...String:
MAERGYSFSL TTFSPSGKLV QIEYALAAVA GGAPSVGIKA ANGVVLATEK KQKSILYDER SVHKVEPITK HIGLVYSGMG PDYRVLVHR ARKLAQQYYL VYQEPIPTAQ LVQRVASVMQ EYTQSGGVRP FGVSLLICGW NEGRPYLFQS DPSGAYFAWK A TAMGKNYV NGKTFLEKRY NEDLELEDAI HTAILTLKES FEGQMTEDNI EVGICNEAGF RRLTPTEVKD YLAAIA

UniProtKB: Proteasome subunit alpha type-2

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Macromolecule #6: Proteasome subunit alpha type-4

MacromoleculeName: Proteasome subunit alpha type-4 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 29.525842 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSRRYDSRTT IFSPEGRLYQ VEYAMEAIGH AGTCLGILAN DGVLLAAERR NIHKLLDEVF FSEKIYKLNE DMACSVAGIT SDANVLTNE LRLIAQRYLL QYQEPIPCEQ LVTALCDIKQ AYTQFGGKRP FGVSLLYIGW DKHYGFQLYQ SDPSGNYGGW K ATCIGNNS ...String:
MSRRYDSRTT IFSPEGRLYQ VEYAMEAIGH AGTCLGILAN DGVLLAAERR NIHKLLDEVF FSEKIYKLNE DMACSVAGIT SDANVLTNE LRLIAQRYLL QYQEPIPCEQ LVTALCDIKQ AYTQFGGKRP FGVSLLYIGW DKHYGFQLYQ SDPSGNYGGW K ATCIGNNS AAAVSMLKQD YKEGEMTLKS ALALAIKVLN KTMDVSKLSA EKVEIATLTR ENGKTVIRVL KQKEVEQLIK KH EEEEAKA EREKKEKEQK EKDK

UniProtKB: Proteasome subunit alpha type-4

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Macromolecule #7: Proteasome subunit alpha type-7

MacromoleculeName: Proteasome subunit alpha type-7 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.929891 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSYDRAITVF SPDGHLFQVE YAQEAVKKGS TAVGVRGRDI VVLGVEKKSV AKLQDERTVR KICALDDNVC MAFAGLTADA RIVINRARV ECQSHRLTVE DPVTVEYITR YIASLKQRYT QSNGRRPFGI SALIVGFDFD GTPRLYQTDP SGTYHAWKAN A IGRGAKSV ...String:
MSYDRAITVF SPDGHLFQVE YAQEAVKKGS TAVGVRGRDI VVLGVEKKSV AKLQDERTVR KICALDDNVC MAFAGLTADA RIVINRARV ECQSHRLTVE DPVTVEYITR YIASLKQRYT QSNGRRPFGI SALIVGFDFD GTPRLYQTDP SGTYHAWKAN A IGRGAKSV REFLEKNYTD EAIETDDLTI KLVIKALLEV VQSGGKNIEL AVMRRDQSLK ILNPEEIEKY VAEIEKEKEE NE KKKQKKA S

UniProtKB: Proteasome subunit alpha type-7

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Macromolecule #8: Proteasome subunit alpha type-5

MacromoleculeName: Proteasome subunit alpha type-5 / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.435977 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MFLTRSEYDR GVNTFSPEGR LFQVEYAIEA IKLGSTAIGI QTSEGVCLAV EKRITSPLME PSSIEKIVEI DAHIGCAMSG LIADAKTLI DKARVETQNH WFTYNETMTV ESVTQAVSNL ALQFGEEDAD PGAMSRPFGV ALLFGGVDEK GPQLFHMDPS G TFVQCDAR ...String:
MFLTRSEYDR GVNTFSPEGR LFQVEYAIEA IKLGSTAIGI QTSEGVCLAV EKRITSPLME PSSIEKIVEI DAHIGCAMSG LIADAKTLI DKARVETQNH WFTYNETMTV ESVTQAVSNL ALQFGEEDAD PGAMSRPFGV ALLFGGVDEK GPQLFHMDPS G TFVQCDAR AIGSASEGAQ SSLQEVYHKS MTLKEAIKSS LIILKQVMEE KLNATNIELA TVQPGQNFHM FTKEELEEVI KD I

UniProtKB: Proteasome subunit alpha type-5

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Macromolecule #9: Proteasome subunit alpha type-1

MacromoleculeName: Proteasome subunit alpha type-1 / type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 29.595627 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MFRNQYDNDV TVWSPQGRIH QIEYAMEAVK QGSATVGLKS KTHAVLVALK RAQSELAAHQ KKILHVDNHI GISIAGLTAD ARLLCNFMR QECLDSRFVF DRPLPVSRLV SLIGSKTQIP TQRYGRRPYG VGLLIAGYDD MGPHIFQTCP SANYFDCRAM S IGARSQSA ...String:
MFRNQYDNDV TVWSPQGRIH QIEYAMEAVK QGSATVGLKS KTHAVLVALK RAQSELAAHQ KKILHVDNHI GISIAGLTAD ARLLCNFMR QECLDSRFVF DRPLPVSRLV SLIGSKTQIP TQRYGRRPYG VGLLIAGYDD MGPHIFQTCP SANYFDCRAM S IGARSQSA RTYLERHMSE FMECNLNELV KHGLRALRET LPAEQDLTTK NVSIGIVGKD LEFTIYDDDD VSPFLEGLEE RP QRKAQPA QPADEPAEKA DEPMEH

UniProtKB: Proteasome subunit alpha type-1

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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

BufferpH: 7.5
GridModel: Quantifoil R3.5/1 / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: CARBON / Support film - #1 - topology: CONTINUOUS / Support film - #1 - Film thickness: 2 / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 44.4 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.9000000000000001 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 61740
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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