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- EMDB-25848: Cryo-EM structure of the 20S Alpha 3 Deletion proteasome core par... -

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ID or keywords:

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Basic information

Entry
Database: EMDB / ID: EMD-25848
TitleCryo-EM structure of the 20S Alpha 3 Deletion proteasome core particle in complex with FUB1
Map dataMap of 20S Alpha 3 Deletion in complex with Fub1
Sample
  • Complex: 20S proteasome from alpha3delta proteasome mutant in complex with Silencing boundary-establishment protein FUB1Proteasome
    • Protein or peptide: x 14 types
KeywordsPI31 / core particle / HYDROLASE
Function / homology
Function and homology information


proteasome core complex assembly / nuclear outer membrane-endoplasmic reticulum membrane network / Cross-presentation of soluble exogenous antigens (endosomes) / TNFR2 non-canonical NF-kB pathway / proteasomal ubiquitin-independent protein catabolic process / Ub-specific processing proteases / proteasome binding / proteasome storage granule / endopeptidase activator activity / proteasome assembly ...proteasome core complex assembly / nuclear outer membrane-endoplasmic reticulum membrane network / Cross-presentation of soluble exogenous antigens (endosomes) / TNFR2 non-canonical NF-kB pathway / proteasomal ubiquitin-independent protein catabolic process / Ub-specific processing proteases / proteasome binding / proteasome storage granule / endopeptidase activator activity / proteasome assembly / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome core complex, alpha-subunit complex / threonine-type endopeptidase activity / Neutrophil degranulation / proteasome complex / proteasomal protein catabolic process / chromatin organization / proteasome-mediated ubiquitin-dependent protein catabolic process / endopeptidase activity / mRNA binding / endoplasmic reticulum membrane / mitochondrion / nucleus / cytosol / cytoplasm
Similarity search - Function
Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit beta 4 / Proteasome subunit beta 2 / Proteasome beta 3 subunit / Proteasome subunit alpha6 / Proteasome subunit alpha5 / Proteasome beta-type subunits signature. / Peptidase T1A, proteasome beta-subunit / Proteasome beta-type subunit, conserved site ...Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit beta 4 / Proteasome subunit beta 2 / Proteasome beta 3 subunit / 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
Probable proteasome subunit alpha type-7 / Proteasome subunit alpha type-1 / Proteasome subunit beta type-4 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-6 / Proteasome subunit beta type-2 / Proteasome subunit beta type-3 / Silencing boundary-establishment protein FUB1 / Proteasome subunit beta type-5 / Proteasome subunit beta type-7 ...Probable proteasome subunit alpha type-7 / Proteasome subunit alpha type-1 / Proteasome subunit beta type-4 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-6 / Proteasome subunit beta type-2 / Proteasome subunit beta type-3 / Silencing boundary-establishment protein FUB1 / Proteasome subunit beta type-5 / Proteasome subunit beta type-7 / Proteasome subunit alpha type-5 / Proteasome subunit beta type-1 / Proteasome subunit alpha type-6 / Proteasome subunit alpha type-4
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast) / Saccharomyces cerevisiae S288C (yeast)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.97 Å
AuthorsWalsh Jr RM / Rawson S
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)DP5-OD019800 United States
CitationJournal: Nat Struct Mol Biol / Year: 2022
Title: Yeast PI31 inhibits the proteasome by a direct multisite mechanism.
Authors: Shaun Rawson / Richard M Walsh / Benjamin Velez / Helena M Schnell / Fenglong Jiao / Marie Blickling / Jessie Ang / Meera K Bhanu / Lan Huang / John Hanna /
Abstract: Proteasome inhibitors are widely used as therapeutics and research tools, and typically target one of the three active sites, each present twice in the proteasome complex. An endogeneous proteasome ...Proteasome inhibitors are widely used as therapeutics and research tools, and typically target one of the three active sites, each present twice in the proteasome complex. An endogeneous proteasome inhibitor, PI31, was identified 30 years ago, but its inhibitory mechanism has remained unclear. Here, we identify the mechanism of Saccharomyces cerevisiae PI31, also known as Fub1. Using cryo-electron microscopy (cryo-EM), we show that the conserved carboxy-terminal domain of Fub1 is present inside the proteasome's barrel-shaped core particle (CP), where it simultaneously interacts with all six active sites. Targeted mutations of Fub1 disrupt proteasome inhibition at one active site, while leaving the other sites unaffected. Fub1 itself evades degradation through distinct mechanisms at each active site. The gate that allows substrates to access the CP is constitutively closed, and Fub1 is enriched in mutant CPs with an abnormally open gate, suggesting that Fub1 may function to neutralize aberrant proteasomes, thereby ensuring the fidelity of proteasome-mediated protein degradation.
History
DepositionJan 5, 2022-
Header (metadata) releaseAug 10, 2022-
Map releaseAug 10, 2022-
UpdateFeb 28, 2024-
Current statusFeb 28, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_25848.png

Downloads & links

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Map

FileDownload / File: emd_25848.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMap of 20S Alpha 3 Deletion in complex with Fub1
Voxel sizeX=Y=Z: 1.06 Å
Density
Contour LevelBy AUTHOR: 0.306
Minimum - Maximum-1.7458677 - 3.7419844
Average (Standard dev.)0.0023184044 (±0.115218535)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 381.59998 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : 20S proteasome from alpha3delta proteasome mutant in complex with...

EntireName: 20S proteasome from alpha3delta proteasome mutant in complex with Silencing boundary-establishment protein FUB1Proteasome
Components
  • Complex: 20S proteasome from alpha3delta proteasome mutant in complex with Silencing boundary-establishment protein FUB1Proteasome
    • Protein or peptide: Proteasome subunit beta type-6
    • Protein or peptide: Proteasome subunit beta type-7
    • Protein or peptide: Proteasome subunit alpha type-1
    • Protein or peptide: Proteasome subunit alpha type-2
    • Protein or peptide: Proteasome subunit alpha type-4
    • Protein or peptide: Proteasome subunit alpha type-5
    • Protein or peptide: Proteasome subunit alpha type-6
    • Protein or peptide: Proteasome subunit alpha type-7
    • Protein or peptide: Proteasome subunit beta type-1PSMB1
    • Protein or peptide: Proteasome subunit beta type-2PSMB2
    • Protein or peptide: Proteasome subunit beta type-3PSMB3
    • Protein or peptide: Proteasome subunit beta type-4PSMB4
    • Protein or peptide: Proteasome subunit beta type-5PSMB5
    • Protein or peptide: Silencing boundary-establishment protein FUB1

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Supramolecule #1: 20S proteasome from alpha3delta proteasome mutant in complex with...

SupramoleculeName: 20S proteasome from alpha3delta proteasome mutant in complex with Silencing boundary-establishment protein FUB1
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Details: Genomic deletion of alpha3: 20S contains two alpha4 subunits (alpha4 substitutes for deleted alpha3) In complex with FUB1
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 727 KDa

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Macromolecule #1: Proteasome subunit beta type-6

MacromoleculeName: Proteasome subunit beta type-6 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 26.905076 KDa
SequenceString: MATIASEYSS EASNTPIEHQ FNPYGDNGGT ILGIAGEDFA VLAGDTRNIT DYSINSRYEP KVFDCGDNIV MSANGFAADG DALVKRFKN SVKWYHFDHN DKKLSINSAA RNIQHLLYGK RFFPYYVHTI IAGLDEDGKG AVYSFDPVGS YEREQCRAGG A AASLIMPF ...String:
MATIASEYSS EASNTPIEHQ FNPYGDNGGT ILGIAGEDFA VLAGDTRNIT DYSINSRYEP KVFDCGDNIV MSANGFAADG DALVKRFKN SVKWYHFDHN DKKLSINSAA RNIQHLLYGK RFFPYYVHTI IAGLDEDGKG AVYSFDPVGS YEREQCRAGG A AASLIMPF LDNQVNFKNQ YEPGTNGKVK KPLKYLSVEE VIKLVRDSFT SATERHIQVG DGLEILIVTK DGVRKEFYEL KR D

UniProtKB: Proteasome subunit beta type-6

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Macromolecule #2: Proteasome subunit beta type-7

MacromoleculeName: Proteasome subunit beta type-7 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 29.471289 KDa
SequenceString: MNHDPFSWGR PADSTYGAYN TQIANAGASP MVNTQQPIVT GTSVISMKYD NGVIIAADNL GSYGSLLRFN GVERLIPVGD NTVVGISGD ISDMQHIERL LKDLVTENAY DNPLADAEEA LEPSYIFEYL ATVMYQRRSK MNPLWNAIIV AGVQSNGDQF L RYVNLLGV ...String:
MNHDPFSWGR PADSTYGAYN TQIANAGASP MVNTQQPIVT GTSVISMKYD NGVIIAADNL GSYGSLLRFN GVERLIPVGD NTVVGISGD ISDMQHIERL LKDLVTENAY DNPLADAEEA LEPSYIFEYL ATVMYQRRSK MNPLWNAIIV AGVQSNGDQF L RYVNLLGV TYSSPTLATG FGAHMANPLL RKVVDRESDI PKTTVQVAEE AIVNAMRVLY YRDARSSRNF SLAIIDKNTG LT FKKNLQV ENMKWDFAKD IKGYGTQKI

UniProtKB: Proteasome subunit beta type-7

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Macromolecule #3: Proteasome subunit alpha type-1

MacromoleculeName: Proteasome subunit alpha type-1 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 28.03383 KDa
SequenceString: MSGAAAASAA GYDRHITIFS PEGRLYQVEY AFKATNQTNI NSLAVRGKDC TVVISQKKVP DKLLDPTTVS YIFCISRTIG MVVNGPIPD ARNAALRAKA EAAEFRYKYG YDMPCDVLAK RMANLSQIYT QRAYMRPLGV ILTFVSVDEE LGPSIYKTDP A GYYVGYKA ...String:
MSGAAAASAA GYDRHITIFS PEGRLYQVEY AFKATNQTNI NSLAVRGKDC TVVISQKKVP DKLLDPTTVS YIFCISRTIG MVVNGPIPD ARNAALRAKA EAAEFRYKYG YDMPCDVLAK RMANLSQIYT QRAYMRPLGV ILTFVSVDEE LGPSIYKTDP A GYYVGYKA TATGPKQQEI TTNLENHFKK SKIDHINEES WEKVVEFAIT HMIDALGTEF SKNDLEVGVA TKDKFFTLSA EN IEERLVA IAEQD

UniProtKB: Proteasome subunit alpha type-1

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Macromolecule #4: Proteasome subunit alpha type-2

MacromoleculeName: Proteasome subunit alpha type-2 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 27.191828 KDa
SequenceString: MTDRYSFSLT TFSPSGKLGQ IDYALTAVKQ GVTSLGIKAT NGVVIATEKK SSSPLAMSET LSKVSLLTPD IGAVYSGMGP DYRVLVDKS RKVAHTSYKR IYGEYPPTKL LVSEVAKIMQ EATQSGGVRP FGVSLLIAGH DEFNGFSLYQ VDPSGSYFPW K ATAIGKGS ...String:
MTDRYSFSLT TFSPSGKLGQ IDYALTAVKQ GVTSLGIKAT NGVVIATEKK SSSPLAMSET LSKVSLLTPD IGAVYSGMGP DYRVLVDKS RKVAHTSYKR IYGEYPPTKL LVSEVAKIMQ EATQSGGVRP FGVSLLIAGH DEFNGFSLYQ VDPSGSYFPW K ATAIGKGS VAAKTFLEKR WNDELELEDA IHIALLTLKE SVEGEFNGDT IELAIIGDEN PDLLGYTGIP TDKGPRFRKL TS QEINDRL EAL

UniProtKB: Proteasome subunit alpha type-2

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Macromolecule #5: Proteasome subunit alpha type-4

MacromoleculeName: Proteasome subunit alpha type-4 / type: protein_or_peptide / ID: 5 / Number of copies: 4 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 28.478111 KDa
SequenceString: MSGYDRALSI FSPDGHIFQV EYALEAVKRG TCAVGVKGKN CVVLGCERRS TLKLQDTRIT PSKVSKIDSH VVLSFSGLNA DSRILIEKA RVEAQSHRLT LEDPVTVEYL TRYVAGVQQR YTQSGGVRPF GVSTLIAGFD PRDDEPKLYQ TEPSGIYSSW S AQTIGRNS ...String:
MSGYDRALSI FSPDGHIFQV EYALEAVKRG TCAVGVKGKN CVVLGCERRS TLKLQDTRIT PSKVSKIDSH VVLSFSGLNA DSRILIEKA RVEAQSHRLT LEDPVTVEYL TRYVAGVQQR YTQSGGVRPF GVSTLIAGFD PRDDEPKLYQ TEPSGIYSSW S AQTIGRNS KTVREFLEKN YDRKEPPATV EECVKLTVRS LLEVVQTGAK NIEITVVKPD SDIVALSSEE INQYVTQIEQ EK QEQQEQD KKKKSNH

UniProtKB: Proteasome subunit alpha type-4

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Macromolecule #6: Proteasome subunit alpha type-5

MacromoleculeName: Proteasome subunit alpha type-5 / type: protein_or_peptide / ID: 6 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 28.649086 KDa
SequenceString: MFLTRSEYDR GVSTFSPEGR LFQVEYSLEA IKLGSTAIGI ATKEGVVLGV EKRATSPLLE SDSIEKIVEI DRHIGCAMSG LTADARSMI EHARTAAVTH NLYYDEDINV ESLTQSVCDL ALRFGEGASG EERLMSRPFG VALLIAGHDA DDGYQLFHAE P SGTFYRYN ...String:
MFLTRSEYDR GVSTFSPEGR LFQVEYSLEA IKLGSTAIGI ATKEGVVLGV EKRATSPLLE SDSIEKIVEI DRHIGCAMSG LTADARSMI EHARTAAVTH NLYYDEDINV ESLTQSVCDL ALRFGEGASG EERLMSRPFG VALLIAGHDA DDGYQLFHAE P SGTFYRYN AKAIGSGSEG AQAELLNEWH SSLTLKEAEL LVLKILKQVM EEKLDENNAQ LSCITKQDGF KIYDNEKTAE LI KELKEKE AAESPEEADV EMS

UniProtKB: Proteasome subunit alpha type-5

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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: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 25.634 KDa
SequenceString: MFRNNYDGDT VTFSPTGRLF QVEYALEAIK QGSVTVGLRS NTHAVLVALK RNADELSSYQ KKIIKCDEHM GLSLAGLAPD ARVLSNYLR QQCNYSSLVF NRKLAVERAG HLLCDKAQKN TQSYGGRPYG VGLLIIGYDK SGAHLLEFQP SGNVTELYGT A IGARSQGA ...String:
MFRNNYDGDT VTFSPTGRLF QVEYALEAIK QGSVTVGLRS NTHAVLVALK RNADELSSYQ KKIIKCDEHM GLSLAGLAPD ARVLSNYLR QQCNYSSLVF NRKLAVERAG HLLCDKAQKN TQSYGGRPYG VGLLIIGYDK SGAHLLEFQP SGNVTELYGT A IGARSQGA KTYLERTLDT FIKIDGNPDE LIKAGVEAIS QSLRDESLTV DNLSIAIVGK DTPFTIYDGE AVAKYI

UniProtKB: Proteasome subunit alpha type-6

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Macromolecule #8: Proteasome subunit alpha type-7

MacromoleculeName: Proteasome subunit alpha type-7 / type: protein_or_peptide / ID: 8 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 31.575068 KDa
SequenceString: MTSIGTGYDL SNSVFSPDGR NFQVEYAVKA VENGTTSIGI KCNDGVVFAV EKLITSKLLV PQKNVKIQVV DRHIGCVYSG LIPDGRHLV NRGREEAASF KKLYKTPIPI PAFADRLGQY VQAHTLYNSV RPFGVSTIFG GVDKNGAHLY MLEPSGSYWG Y KGAATGKG ...String:
MTSIGTGYDL SNSVFSPDGR NFQVEYAVKA VENGTTSIGI KCNDGVVFAV EKLITSKLLV PQKNVKIQVV DRHIGCVYSG LIPDGRHLV NRGREEAASF KKLYKTPIPI PAFADRLGQY VQAHTLYNSV RPFGVSTIFG GVDKNGAHLY MLEPSGSYWG Y KGAATGKG RQSAKAELEK LVDHHPEGLS AREAVKQAAK IIYLAHEDNK EKDFELEISW CSLSETNGLH KFVKGDLLQE AI DFAQKEI NGDDDEDEDD SDNVMSSDDE NAPVATNANA TTDQEGDIHL E

UniProtKB: Probable proteasome subunit alpha type-7

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Macromolecule #9: Proteasome subunit beta type-1

MacromoleculeName: Proteasome subunit beta type-1 / type: protein_or_peptide / ID: 9 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 23.573604 KDa
SequenceString: MNGIQVDINR LKKGEVSLGT SIMAVTFKDG VILGADSRTT TGAYIANRVT DKLTRVHDKI WCCRSGSAAD TQAIADIVQY HLELYTSQY GTPSTETAAS VFKELCYENK DNLTAGIIVA GYDDKNKGEV YTIPLGGSVH KLPYAIAGSG STFIYGYCDK N FRENMSKE ...String:
MNGIQVDINR LKKGEVSLGT SIMAVTFKDG VILGADSRTT TGAYIANRVT DKLTRVHDKI WCCRSGSAAD TQAIADIVQY HLELYTSQY GTPSTETAAS VFKELCYENK DNLTAGIIVA GYDDKNKGEV YTIPLGGSVH KLPYAIAGSG STFIYGYCDK N FRENMSKE ETVDFIKHSL SQAIKWDGSS GGVIRMVVLT AAGVERLIFY PDEYEQL

UniProtKB: Proteasome subunit beta type-1

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Macromolecule #10: Proteasome subunit beta type-2

MacromoleculeName: Proteasome subunit beta type-2 / type: protein_or_peptide / ID: 10 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 28.299889 KDa
SequenceString: MAGLSFDNYQ RNNFLAENSH TQPKATSTGT TIVGVKFNNG VVIAADTRST QGPIVADKNC AKLHRISPKI WCAGAGTAAD TEAVTQLIG SNIELHSLYT SREPRVVSAL QMLKQHLFKY QGHIGAYLIV AGVDPTGSHL FSIHAHGSTD VGYYLSLGSG S LAAMAVLE ...String:
MAGLSFDNYQ RNNFLAENSH TQPKATSTGT TIVGVKFNNG VVIAADTRST QGPIVADKNC AKLHRISPKI WCAGAGTAAD TEAVTQLIG SNIELHSLYT SREPRVVSAL QMLKQHLFKY QGHIGAYLIV AGVDPTGSHL FSIHAHGSTD VGYYLSLGSG S LAAMAVLE SHWKQDLTKE EAIKLASDAI QAGIWNDLGS GSNVDVCVME IGKDAEYLRN YLTPNVREEK QKSYKFPRGT TA VLKESIV NICDIQEEQV DITA

UniProtKB: Proteasome subunit beta type-2

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Macromolecule #11: Proteasome subunit beta type-3

MacromoleculeName: Proteasome subunit beta type-3 / type: protein_or_peptide / ID: 11 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 22.627842 KDa
SequenceString: MSDPSSINGG IVVAMTGKDC VAIACDLRLG SQSLGVSNKF EKIFHYGHVF LGITGLATDV TTLNEMFRYK TNLYKLKEER AIEPETFTQ LVSSSLYERR FGPYFVGPVV AGINSKSGKP FIAGFDLIGC IDEAKDFIVS GTASDQLFGM CESLYEPNLE P EDLFETIS ...String:
MSDPSSINGG IVVAMTGKDC VAIACDLRLG SQSLGVSNKF EKIFHYGHVF LGITGLATDV TTLNEMFRYK TNLYKLKEER AIEPETFTQ LVSSSLYERR FGPYFVGPVV AGINSKSGKP FIAGFDLIGC IDEAKDFIVS GTASDQLFGM CESLYEPNLE P EDLFETIS QALLNAADRD ALSGWGAVVY IIKKDEVVKR YLKMRQD

UniProtKB: Proteasome subunit beta type-3

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Macromolecule #12: Proteasome subunit beta type-4

MacromoleculeName: Proteasome subunit beta type-4 / type: protein_or_peptide / ID: 12 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 22.545676 KDa
SequenceString: MDIILGIRVQ DSVILASSKA VTRGISVLKD SDDKTRQLSP HTLMSFAGEA GDTVQFAEYI QANIQLYSIR EDYELSPQAV SSFVRQELA KSIRSRRPYQ VNVLIGGYDK KKNKPELYQI DYLGTKVELP YGAHGYSGFY TFSLLDHHYR PDMTTEEGLD L LKLCVQEL ...String:
MDIILGIRVQ DSVILASSKA VTRGISVLKD SDDKTRQLSP HTLMSFAGEA GDTVQFAEYI QANIQLYSIR EDYELSPQAV SSFVRQELA KSIRSRRPYQ VNVLIGGYDK KKNKPELYQI DYLGTKVELP YGAHGYSGFY TFSLLDHHYR PDMTTEEGLD L LKLCVQEL EKRMPMDFKG VIVKIVDKDG IRQVDDFQAQ

UniProtKB: Proteasome subunit beta type-4

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Macromolecule #13: Proteasome subunit beta type-5

MacromoleculeName: Proteasome subunit beta type-5 / type: protein_or_peptide / ID: 13 / Number of copies: 2 / Enantiomer: LEVO / EC number: proteasome endopeptidase complex
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 31.670539 KDa
SequenceString: MQAIADSFSV PNRLVKELQY DNEQNLESDF VTGASQFQRL APSLTVPPIA SPQQFLRAHT DDSRNPDCKI KIAHGTTTLA FRFQGGIIV AVDSRATAGN WVASQTVKKV IEINPFLLGT MAGGAADCQF WETWLGSQCR LHELREKERI SVAAASKILS N LVYQYKGA ...String:
MQAIADSFSV PNRLVKELQY DNEQNLESDF VTGASQFQRL APSLTVPPIA SPQQFLRAHT DDSRNPDCKI KIAHGTTTLA FRFQGGIIV AVDSRATAGN WVASQTVKKV IEINPFLLGT MAGGAADCQF WETWLGSQCR LHELREKERI SVAAASKILS N LVYQYKGA GLSMGTMICG YTRKEGPTIY YVDSDGTRLK GDIFCVGSGQ TFAYGVLDSN YKWDLSVEDA LYLGKRSILA AA HRDAYSG GSVNLYHVTE DGWIYHGNHD VGELFWKVKE EEGSFNNVIG

UniProtKB: Proteasome subunit beta type-5

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Macromolecule #14: Silencing boundary-establishment protein FUB1

MacromoleculeName: Silencing boundary-establishment protein FUB1 / type: protein_or_peptide / ID: 14 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae S288C (yeast) / Strain: ATCC 204508 / S288c
Molecular weightTheoretical: 26.780809 KDa
SequenceString: MIENKVELVA ELVLESIGKT EVVSRHTEGT KSCQVSFRIK DSPSEKGSTS FLSELVVIQT LDDNDKYTVV IRHGTSITMA CVVGYSDFK LPTELKWPLE RESLPVEPDL KPIMTQLKRQ TAGSADMPKF DDEYQAQARQ NQGTAPLNPY PGLTVTEPSF A NPAGGYAD ...String:
MIENKVELVA ELVLESIGKT EVVSRHTEGT KSCQVSFRIK DSPSEKGSTS FLSELVVIQT LDDNDKYTVV IRHGTSITMA CVVGYSDFK LPTELKWPLE RESLPVEPDL KPIMTQLKRQ TAGSADMPKF DDEYQAQARQ NQGTAPLNPY PGLTVTEPSF A NPAGGYAD GDLYPVGTSH PDWSGGLPNP LGNPSSQGGM IFDPNRRPAP RREDMPPGWM PGSKYDEPFG PGSGGFGGSG SG GFGGSGS GFI

UniProtKB: Silencing boundary-establishment protein FUB1

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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

Concentration1.8 mg/mL
BufferpH: 7.5
Component:
ConcentrationNameFormula
50.0 mMTris Buffer
1.0 mMEDTAEthylenediaminetetraacetic acid
100.0 mMSodium ChlorideNaClSodium chloride

Details: Fluorinated Fos-Choline was added to the sample immediately prior to deposition on a grid for plunge freezing.
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.039 kPa / Details: 30 s glow discharge at 15 mA
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295.15 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 magnification: 47169 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 81000
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 25 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Average exposure time: 4.0 sec. / Average electron dose: 53.85 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 953049
Startup modelType of model: INSILICO MODEL
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final reconstructionApplied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 2.97 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 56059

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: AB INITIO MODEL
Output model

PDB-7teo:
Cryo-EM structure of the 20S Alpha 3 Deletion proteasome core particle in complex with FUB1

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