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- EMDB-18755: Human 20S proteasome assembly structure 1 -

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Basic information

Entry
Database: EMDB / ID: EMD-18755
TitleHuman 20S proteasome assembly structure 1
Map data
Sample
  • Complex: Human 20S proteasome assembly intermediate map 1
    • Protein or peptide: x 13 types
KeywordsComplex / HYDROLASE
Function / homology
Function and homology information


cerebellar granule cell precursor proliferation / purine ribonucleoside triphosphate binding / regulation of endopeptidase activity / protein folding chaperone complex / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex assembly / Somitogenesis / myofibril ...cerebellar granule cell precursor proliferation / purine ribonucleoside triphosphate binding / regulation of endopeptidase activity / protein folding chaperone complex / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex assembly / Somitogenesis / myofibril / immune system process / proteasome binding / mitotic spindle assembly checkpoint signaling / NF-kappaB binding / chaperone-mediated protein complex assembly / proteasome assembly / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome core complex, alpha-subunit complex / threonine-type endopeptidase activity / sarcomere / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / proteolysis involved in protein catabolic process / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Ubiquitin-dependent degradation of Cyclin D / AUF1 (hnRNP D0) binds and destabilizes mRNA / TNFR2 non-canonical NF-kB pathway / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Degradation of DVL / negative regulation of inflammatory response to antigenic stimulus / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / lipopolysaccharide binding / Hh mutants are degraded by ERAD / Degradation of AXIN / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / G2/M Checkpoints / Negative regulation of NOTCH4 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Autodegradation of the E3 ubiquitin ligase COP1 / Vif-mediated degradation of APOBEC3G / P-body / Regulation of RUNX3 expression and activity / Hedgehog 'on' state / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / MAPK6/MAPK4 signaling / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / response to virus / Degradation of beta-catenin by the destruction complex / ABC-family proteins mediated transport / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / Regulation of expression of SLITs and ROBOs / FCERI mediated NF-kB activation / nuclear matrix / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Separation of Sister Chromatids / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / UCH proteinases / KEAP1-NFE2L2 pathway / Antigen processing: Ubiquitination & Proteasome degradation / Downstream TCR signaling / positive regulation of NF-kappaB transcription factor activity / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / regulation of inflammatory response / secretory granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / endopeptidase activity / ficolin-1-rich granule lumen / postsynapse / molecular adaptor activity / nuclear body / Ub-specific processing proteases / ribosome / nuclear speck / intracellular membrane-bounded organelle / centrosome / ubiquitin protein ligase binding / Neutrophil degranulation / synapse
Similarity search - Function
Proteasome assembly chaperone 4 / Proteasome assembly chaperone 4 / Proteasome assembly chaperone 3 / Proteasome assembly chaperone 3 / : / Proteasome assembly chaperone 1 / Proteasome assembly chaperone 4 / Proteasome maturation factor Ump1 / Proteasome maturation factor UMP1 / Proteasome assembly chaperone 2, eukaryotic ...Proteasome assembly chaperone 4 / Proteasome assembly chaperone 4 / Proteasome assembly chaperone 3 / Proteasome assembly chaperone 3 / : / Proteasome assembly chaperone 1 / Proteasome assembly chaperone 4 / Proteasome maturation factor Ump1 / Proteasome maturation factor UMP1 / Proteasome assembly chaperone 2, eukaryotic / Proteasome assembly chaperone 2 / Proteasome assembly chaperone 2 superfamily / PAC2 family / Proteasome subunit alpha 1 / Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit alpha6 / Proteasome subunit alpha5 / Proteasome beta-type subunits signature. / Peptidase T1A, proteasome beta-subunit / 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 B-type subunit / Proteasome beta-type subunit profile. / Proteasome subunit / Proteasome, subunit alpha/beta / Nucleophile aminohydrolases, N-terminal
Similarity search - Domain/homology
Proteasome subunit alpha type-7 / Proteasome assembly chaperone 1 / 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 / Proteasome assembly chaperone 4 / Proteasome assembly chaperone 2 ...Proteasome subunit alpha type-7 / Proteasome assembly chaperone 1 / 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 / Proteasome assembly chaperone 4 / Proteasome assembly chaperone 2 / Proteasome subunit beta type-7 / Proteasome assembly chaperone 3 / Proteasome maturation protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.73 Å
AuthorsSchulman BA / Hanna JW / Harper JW / Adolf F / Du J / Rawson SD / Walsh Jr RM / Goodall EA
Funding support Germany, United States, 4 items
OrganizationGrant numberCountry
Max Planck Society Germany
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
National Institutes of Health/National Institute on Aging (NIH/NIA) United States
Aligning Science Across Parkinsons (ASAP) United States
CitationJournal: bioRxiv / Year: 2024
Title: Visualizing chaperone-mediated multistep assembly of the human 20S proteasome.
Authors: Frank Adolf / Jiale Du / Ellen A Goodall / Richard M Walsh / Shaun Rawson / Susanne von Gronau / J Wade Harper / John Hanna / Brenda A Schulman /
Abstract: Dedicated assembly factors orchestrate stepwise production of many molecular machines, including the 28-subunit proteasome core particle (CP) that mediates protein degradation. Here, we report cryo- ...Dedicated assembly factors orchestrate stepwise production of many molecular machines, including the 28-subunit proteasome core particle (CP) that mediates protein degradation. Here, we report cryo-EM reconstructions of seven recombinant human subcomplexes that visualize all five chaperones and the three active site propeptides across a wide swath of the assembly pathway. Comparison of these chaperone-bound intermediates and a matching mature CP reveals molecular mechanisms determining the order of successive subunit additions, and how proteasome subcomplexes and assembly factors structurally adapt upon progressive subunit incorporation to stabilize intermediates, facilitate the formation of subsequent intermediates, and ultimately rearrange to coordinate proteolytic activation with gated access to active sites. The structural findings reported here explain many previous biochemical and genetic observations. This work establishes a methodologic approach for structural analysis of multiprotein complex assembly intermediates, illuminates specific functions of assembly factors, and reveals conceptual principles underlying human proteasome biogenesis.
History
DepositionOct 26, 2023-
Header (metadata) releaseFeb 21, 2024-
Map releaseFeb 21, 2024-
UpdateNov 6, 2024-
Current statusNov 6, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_18755.png

Downloads & links

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Map

FileDownload / File: emd_18755.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 300 pix.
= 255.36 Å		0.85 Å/pix.
x 300 pix.
= 255.36 Å		0.85 Å/pix.
x 300 pix.
= 255.36 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.8512 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.8
Minimum - Maximum-2.0374522 - 3.8973901
Average (Standard dev.)0.008297266 (±0.12891716)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 255.36 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_18755_msk_1.map
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Additional map: #1

Fileemd_18755_additional_1.map
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Half map: #2

Fileemd_18755_half_map_1.map
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Half map: #1

Fileemd_18755_half_map_2.map
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Sample components

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Entire : Human 20S proteasome assembly intermediate map 1

EntireName: Human 20S proteasome assembly intermediate map 1
Components
  • Complex: Human 20S proteasome assembly intermediate map 1
    • 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: Proteasome subunit alpha type-3
    • Protein or peptide: Proteasome subunit alpha type-6
    • Protein or peptide: Proteasome maturation protein
    • Protein or peptide: Proteasome assembly chaperone 1
    • Protein or peptide: Proteasome assembly chaperone 2
    • Protein or peptide: Proteasome subunit beta type-7
    • Protein or peptide: Proteasome assembly chaperone 3
    • Protein or peptide: Proteasome assembly chaperone 4

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Supramolecule #1: Human 20S proteasome assembly intermediate map 1

SupramoleculeName: Human 20S proteasome assembly intermediate map 1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Proteasome subunit alpha type-2

MacromoleculeName: Proteasome subunit alpha type-2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 25.927535 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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 #2: Proteasome subunit alpha type-4

MacromoleculeName: Proteasome subunit alpha type-4 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 29.525842 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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 #3: Proteasome subunit alpha type-7

MacromoleculeName: Proteasome subunit alpha type-7 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.929891 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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 #4: Proteasome subunit alpha type-5

MacromoleculeName: Proteasome subunit alpha type-5 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.462016 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: (ACE)MFLTRSEYD RGVNTFSPEG RLFQVEYAIE AIKLGSTAIG IQTSEGVCLA VEKRITSPLM EPSSIEKIVE IDAHIG CAM SGLIADAKTL IDKARVETQN HWFTYNETMT VESVTQAVSN LALQFGEEDA DPGAMSRPFG VALLFGGVDE KGPQLFH MD PSGTFVQCDA ...String:
(ACE)MFLTRSEYD RGVNTFSPEG RLFQVEYAIE AIKLGSTAIG IQTSEGVCLA VEKRITSPLM EPSSIEKIVE IDAHIG CAM SGLIADAKTL IDKARVETQN HWFTYNETMT VESVTQAVSN LALQFGEEDA DPGAMSRPFG VALLFGGVDE KGPQLFH MD PSGTFVQCDA RAIGSASEGA QSSLQEVYHK SMTLKEAIKS SLIILKQVME EKLNATNIEL ATVQPGQNFH MFTKEELE E VIKDI

UniProtKB: Proteasome subunit alpha type-5

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Macromolecule #5: Proteasome subunit alpha type-1

MacromoleculeName: Proteasome subunit alpha type-1 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 29.621662 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: (ACE)MFRNQYDND VTVWSPQGRI HQIEYAMEAV KQGSATVGLK SKTHAVLVAL KRAQSELAAH QKKILHVDNH IGISIA GLT ADARLLCNFM RQECLDSRFV FDRPLPVSRL VSLIGSKTQI PTQRYGRRPY GVGLLIAGYD DMGPHIFQTC PSANYFD CR AMSIGARSQS ...String:
(ACE)MFRNQYDND VTVWSPQGRI HQIEYAMEAV KQGSATVGLK SKTHAVLVAL KRAQSELAAH QKKILHVDNH IGISIA GLT ADARLLCNFM RQECLDSRFV FDRPLPVSRL VSLIGSKTQI PTQRYGRRPY GVGLLIAGYD DMGPHIFQTC PSANYFD CR AMSIGARSQS ARTYLERHMS EFMECNLNEL VKHGLRALRE TLPAEQDLTT KNVSIGIVGK DLEFTIYDDD DVSPFLEG L EERPQRKAQP AQPADEPAEK ADEPMEH

UniProtKB: Proteasome subunit alpha type-1

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Macromolecule #6: Proteasome subunit alpha type-3

MacromoleculeName: Proteasome subunit alpha type-3 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.469252 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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 #7: Proteasome subunit alpha type-6

MacromoleculeName: Proteasome subunit alpha type-6 / type: protein_or_peptide / ID: 7 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 27.432459 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
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 #8: Proteasome maturation protein

MacromoleculeName: Proteasome maturation protein / type: protein_or_peptide / ID: 8 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 15.804993 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MNARGLGSEL KDSIPVTELS ASGPFESHDL LRKGFSCVKN ELLPSHPLEL SEKNFQLNQD KMNFSTLRNI QGLFAPLKLQ MEFKAVQQV QRLPFLSSSN LSLDVLRGND ETIGFEDILN DPSQSEVMGE PHLMVEYKLG LL

UniProtKB: Proteasome maturation protein

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Macromolecule #9: Proteasome assembly chaperone 1

MacromoleculeName: Proteasome assembly chaperone 1 / type: protein_or_peptide / ID: 9 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 32.891887 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MAATFFGEVV KAPCRAGTED EEEEEEGRRE TPEDREVRLQ LARKREVRLL RRQTKTSLEV SLLEKYPCSK FIIAIGNNAV AFLSSFVMN SGVWEEVGCA KLWNEWCRTT DTTHLSSTEA FCVFYHLKSN PSVFLCQCSC YVAEDQQYQW LEKVFGSCPR K NMQITILT ...String:
MAATFFGEVV KAPCRAGTED EEEEEEGRRE TPEDREVRLQ LARKREVRLL RRQTKTSLEV SLLEKYPCSK FIIAIGNNAV AFLSSFVMN SGVWEEVGCA KLWNEWCRTT DTTHLSSTEA FCVFYHLKSN PSVFLCQCSC YVAEDQQYQW LEKVFGSCPR K NMQITILT CRHVTDYKTS ESTGSLPSPF LRALKTQNFK DSACCPLLEQ PNIVHDLPAA VLSYCQVWKI PAILYLCYTD VM KLDLITV EAFKPILSTR SLKGLVKNIP QSTEILKKLM TTNEIQSNIY T

UniProtKB: Proteasome assembly chaperone 1

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Macromolecule #10: Proteasome assembly chaperone 2

MacromoleculeName: Proteasome assembly chaperone 2 / type: protein_or_peptide / ID: 10 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 29.44908 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: (ACE)MFVPCGESA PDLAGFTLLM PAVSVGNVGQ LAMDLIISTL NMSKIGYFYT DCLVPMVGNN PYATTEGNST ELSINA EVY SLPSRKLVAL QLRSIFIKYK SKPFCEKLLS WVKSSGCARV IVLSSSHSYQ RNDLQLRSTP FRYLLTPSMQ KSVQNKI KS LNWEEMEKSR ...String:
(ACE)MFVPCGESA PDLAGFTLLM PAVSVGNVGQ LAMDLIISTL NMSKIGYFYT DCLVPMVGNN PYATTEGNST ELSINA EVY SLPSRKLVAL QLRSIFIKYK SKPFCEKLLS WVKSSGCARV IVLSSSHSYQ RNDLQLRSTP FRYLLTPSMQ KSVQNKI KS LNWEEMEKSR CIPEIDDSEF CIRIPGGGIT KTLYDESCSK EIQMAVLLKF VSEGDNIPDA LGLVEYLNEW LQILKPLS D DPTVSASRWK IPSSWRLLFG SGLPPALF

UniProtKB: Proteasome assembly chaperone 2

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Macromolecule #11: Proteasome subunit beta type-7

MacromoleculeName: Proteasome subunit beta type-7 / type: protein_or_peptide / ID: 11 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 34.128711 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MAAVSVYAPP VGGFSFDNCR RNAVLEADFA KRGYKLPKVR KTGTTIAGVV YKDGIVLGAD TRATEGMVVA DKNCSKIHFI SPNIYCCGA GTAADTDMTT QLISSNLELH SLSTGRLPRV VTANRMLKQM LFRYQGYIGA ALVLGGVDVT GPHLYSIYPH G STDKLPYV ...String:
MAAVSVYAPP VGGFSFDNCR RNAVLEADFA KRGYKLPKVR KTGTTIAGVV YKDGIVLGAD TRATEGMVVA DKNCSKIHFI SPNIYCCGA GTAADTDMTT QLISSNLELH SLSTGRLPRV VTANRMLKQM LFRYQGYIGA ALVLGGVDVT GPHLYSIYPH G STDKLPYV TMGSGSLAAM AVFEDKFRPD MEEEEAKNLV SEAIAAGIFN DLGSGSNIDL CVISKNKLDF LRPYTVPNKK GT RLGRYRC EKGTTAVLTE KITPLEIEVL EETVQTMDTS EDLYFQSVDS AWSHPQFEKG GGSGGGSGGS AWSHPQFEK

UniProtKB: Proteasome subunit beta type-7

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Macromolecule #12: Proteasome assembly chaperone 3

MacromoleculeName: Proteasome assembly chaperone 3 / type: protein_or_peptide / ID: 12 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.118439 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MEDTPLVISK QKTEVVCGVP TQVVCTAFSS HILVVVTQFG KMGTLVSLEP SSVASDVSKP VLTTKVLLGQ DEPLIHVFAK NLVAFVSQE AGNRAVLLAV AVKDKSMEGL KALREVIRVC QVW

UniProtKB: Proteasome assembly chaperone 3

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Macromolecule #13: Proteasome assembly chaperone 4

MacromoleculeName: Proteasome assembly chaperone 4 / type: protein_or_peptide / ID: 13 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.789648 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MEGLVVAAGG DVSLHNFSAR LWEQLVHFHV MRLTDSLFLW VGATPHLRNL AVAMCSRYDS IPVSTSLLGD TSDTTSTGLA QRLARKTNK QVFVSYNLQN TDSNFALLVE NRIKEEMEAF PEKF

UniProtKB: Proteasome assembly chaperone 4

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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
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 66.9 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.6 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.73 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 318973
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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