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- PDB-6xmj: Human 20S proteasome bound to an engineered 11S (PA26) activator -

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Entry
Database: PDB / ID: 6xmj
TitleHuman 20S proteasome bound to an engineered 11S (PA26) activator
Components
  • (Proteasome subunit alpha type- ...) x 7
  • (Proteasome subunit beta type- ...) x 7
  • Proteasome activator protein PA26
KeywordsHYDROLASE / 11S-bound / 20S proteasome
Function / homology
Function and homology information


proteasome activator complex / purine ribonucleoside triphosphate binding / regulation of endopeptidase activity / proteasome core complex / Regulation of ornithine decarboxylase (ODC) / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / immune system process / myofibril / NF-kappaB binding ...proteasome activator complex / purine ribonucleoside triphosphate binding / regulation of endopeptidase activity / proteasome core complex / Regulation of ornithine decarboxylase (ODC) / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / immune system process / myofibril / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome core complex, alpha-subunit complex / threonine-type endopeptidase activity / regulation of proteasomal protein catabolic process / negative regulation of inflammatory response to antigenic stimulus / : / sarcomere / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / ciliary basal body / 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 / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / Degradation of DVL / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Hh mutants are degraded by ERAD / lipopolysaccharide binding / Degradation of AXIN / Degradation of GLI1 by the proteasome / Activation of NF-kappaB in B cells / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / Negative regulation of NOTCH4 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / G2/M Checkpoints / Vif-mediated degradation of APOBEC3G / Autodegradation of the E3 ubiquitin ligase COP1 / Hedgehog 'on' state / Regulation of RUNX3 expression and activity / 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 / P-body / 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 / response to organic cyclic compound / 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 / nuclear matrix / FCERI mediated NF-kB activation / 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 / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / peptidase activity / positive regulation of NF-kappaB transcription factor activity / ER-Phagosome pathway / regulation of inflammatory response / postsynapse / proteasome-mediated ubiquitin-dependent protein catabolic process / secretory granule lumen / endopeptidase activity / response to oxidative stress / ficolin-1-rich granule lumen / nuclear body / ribosome / Ub-specific processing proteases / cadherin binding / intracellular membrane-bounded organelle / centrosome / ubiquitin protein ligase binding / synapse / Neutrophil degranulation / mitochondrion
Similarity search - Function
Proteasome activator PA28, C-terminal domain / Proteasome activator superfamily / Proteasome activator PA28, C-terminal domain superfamily / Proteasome activator PA28, C-terminal / Proteasome subunit alpha 1 / Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit beta 4 / Proteasome subunit beta 2 / Proteasome beta 3 subunit ...Proteasome activator PA28, C-terminal domain / Proteasome activator superfamily / Proteasome activator PA28, C-terminal domain superfamily / Proteasome activator PA28, C-terminal / Proteasome subunit alpha 1 / 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
Proteasome subunit alpha type-7 / Proteasome subunit beta type-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 beta type-4 / Proteasome subunit beta type-6 / Proteasome subunit beta type-5 ...Proteasome subunit alpha type-7 / Proteasome subunit beta type-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 beta type-4 / Proteasome subunit beta type-6 / Proteasome subunit beta type-5 / Proteasome subunit beta type-3 / Proteasome subunit beta type-2 / Proteasome subunit alpha type-6 / Proteasome subunit beta type-7 / Proteasome activator protein PA26
Similarity search - Component
Biological speciesHomo sapiens (human)
Trypanosoma brucei (eukaryote)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å
Authorsde la Pena, A.H. / Opoku-Nsiah, K.A. / Williams, S.K. / Chopra, N. / Sali, A. / Gestwicki, J.E. / Lander, G.C.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)DP2-EB020402 United States
American Cancer Society132279-PF-18-189-01- DMC United States
CitationJournal: Nat Commun / Year: 2022
Title: The YΦ motif defines the structure-activity relationships of human 20S proteasome activators.
Authors: Kwadwo A Opoku-Nsiah / Andres H de la Pena / Sarah K Williams / Nikita Chopra / Andrej Sali / Gabriel C Lander / Jason E Gestwicki /
Abstract: The 20S proteasome (20S) facilitates turnover of most eukaryotic proteins. Substrate entry into the 20S first requires opening of gating loops through binding of HbYX motifs that are present at the C- ...The 20S proteasome (20S) facilitates turnover of most eukaryotic proteins. Substrate entry into the 20S first requires opening of gating loops through binding of HbYX motifs that are present at the C-termini of certain proteasome activators (PAs). The HbYX motif has been predominantly characterized in the archaeal 20S, whereas little is known about the sequence preferences of the human 20S (h20S). Here, we synthesize and screen ~120 HbYX-like peptides, revealing unexpected differences from the archaeal system and defining the h20S recognition sequence as the Y-F/Y (YФ) motif. To gain further insight, we create a functional chimera of the optimized sequence, NLSYYT, fused to the model activator, PA26. A cryo-EM structure of PA26-h20S is used to identify key interactions, including non-canonical contacts and gate-opening mechanisms. Finally, we demonstrate that the YФ sequence preferences are tuned by valency, allowing multivalent PAs to sample greater sequence space. These results expand the model for termini-mediated gating and provide a template for the design of h20S activators.
History
DepositionJun 30, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 22, 2020Provider: repository / Type: Initial release
Revision 1.1Mar 23, 2022Group: Database references / Category: citation / citation_author / database_2
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.2May 15, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

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Assembly

Deposited unit
A: Proteasome subunit alpha type-6
B: Proteasome subunit alpha type-2
C: Proteasome subunit alpha type-4
D: Proteasome subunit alpha type-7
E: Proteasome subunit alpha type-5
F: Proteasome subunit alpha type-1
G: Proteasome subunit alpha type-3
H: Proteasome subunit beta type-6
I: Proteasome subunit beta type-7
J: Proteasome subunit beta type-3
K: Proteasome subunit beta type-2
L: Proteasome subunit beta type-5
M: Proteasome subunit beta type-1
N: Proteasome subunit beta type-4
O: Proteasome activator protein PA26
P: Proteasome activator protein PA26
Q: Proteasome activator protein PA26
R: Proteasome activator protein PA26
S: Proteasome activator protein PA26
T: Proteasome activator protein PA26
U: Proteasome activator protein PA26


Theoretical massNumber of molelcules
Total (without water)523,66421
Polymers523,66421
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: assay for oligomerization
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area74830 Å2
ΔGint-340 kcal/mol
Surface area173960 Å2

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Components

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Proteasome subunit alpha type- ... , 7 types, 7 molecules ABCDEFG

#1: Protein Proteasome subunit alpha type-6 / 27 kDa prosomal protein / p27K / Macropain iota chain / Multicatalytic endopeptidase complex iota ...27 kDa prosomal protein / p27K / Macropain iota chain / Multicatalytic endopeptidase complex iota chain / Proteasome iota chain


Mass: 27186.174 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA6, PROS27 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P60900, proteasome endopeptidase complex
#2: Protein Proteasome subunit alpha type-2 / Macropain subunit C3 / Multicatalytic endopeptidase complex subunit C3 / Proteasome component C3


Mass: 25796.338 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA2, HC3, PSC3 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P25787, proteasome endopeptidase complex
#3: Protein Proteasome subunit alpha type-4 / Macropain subunit C9 / Multicatalytic endopeptidase complex subunit C9 / Proteasome component C9 / ...Macropain subunit C9 / Multicatalytic endopeptidase complex subunit C9 / Proteasome component C9 / Proteasome subunit L


Mass: 28118.189 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA4, HC9, PSC9 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P25789, proteasome endopeptidase complex
#4: Protein Proteasome subunit alpha type-7 / Proteasome subunit RC6-1 / Proteasome subunit XAPC7


Mass: 27382.178 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA7, HSPC / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: O14818, proteasome endopeptidase complex
#5: Protein Proteasome subunit alpha type-5 / Macropain zeta chain / Multicatalytic endopeptidase complex zeta chain / Proteasome zeta chain


Mass: 25569.957 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA5 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P28066, proteasome endopeptidase complex
#6: Protein Proteasome subunit alpha type-1 / 30 kDa prosomal protein / PROS-30 / Macropain subunit C2 / Multicatalytic endopeptidase complex ...30 kDa prosomal protein / PROS-30 / Macropain subunit C2 / Multicatalytic endopeptidase complex subunit C2 / Proteasome component C2 / Proteasome nu chain


Mass: 26728.428 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA1, HC2, NU, PROS30, PSC2 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P25786, proteasome endopeptidase complex
#7: Protein Proteasome subunit alpha type-3 / Macropain subunit C8 / Multicatalytic endopeptidase complex subunit C8 / Proteasome component C8


Mass: 27287.100 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMA3, HC8, PSC8 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P25788, proteasome endopeptidase complex

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Proteasome subunit beta type- ... , 7 types, 7 molecules HIJKLMN

#8: Protein Proteasome subunit beta type-6 / Macropain delta chain / Multicatalytic endopeptidase complex delta chain / Proteasome delta chain / ...Macropain delta chain / Multicatalytic endopeptidase complex delta chain / Proteasome delta chain / Proteasome subunit Y


Mass: 21656.527 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB6, LMPY, Y / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P28072, proteasome endopeptidase complex
#9: Protein Proteasome subunit beta type-7 / Macropain chain Z / Multicatalytic endopeptidase complex chain Z / Proteasome subunit Z


Mass: 23745.256 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB7, Z / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: Q99436, proteasome endopeptidase complex
#10: Protein Proteasome subunit beta type-3 / Proteasome chain 13 / Proteasome component C10-II / Proteasome theta chain


Mass: 22841.701 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB3 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P49720, proteasome endopeptidase complex
#11: Protein Proteasome subunit beta type-2 / Macropain subunit C7-I / Multicatalytic endopeptidase complex subunit C7-I / Proteasome component C7-I


Mass: 22720.146 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB2 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P49721, proteasome endopeptidase complex
#12: Protein Proteasome subunit beta type-5 / Macropain epsilon chain / Multicatalytic endopeptidase complex epsilon chain / Proteasome chain 6 / ...Macropain epsilon chain / Multicatalytic endopeptidase complex epsilon chain / Proteasome chain 6 / Proteasome epsilon chain / Proteasome subunit MB1 / Proteasome subunit X


Mass: 22199.072 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB5, LMPX, MB1, X / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P28074, proteasome endopeptidase complex
#13: Protein Proteasome subunit beta type-1 / Macropain subunit C5 / Multicatalytic endopeptidase complex subunit C5 / Proteasome component C5 / ...Macropain subunit C5 / Multicatalytic endopeptidase complex subunit C5 / Proteasome component C5 / Proteasome gamma chain


Mass: 23578.986 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB1, PSC5 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P20618, proteasome endopeptidase complex
#14: Protein Proteasome subunit beta type-4 / 26 kDa prosomal protein / PROS-26 / Macropain beta chain / Multicatalytic endopeptidase complex ...26 kDa prosomal protein / PROS-26 / Macropain beta chain / Multicatalytic endopeptidase complex beta chain / Proteasome beta chain / Proteasome chain 3 / HsN3


Mass: 24138.453 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PSMB4, PROS26 / Cell (production host): erythrocytes / Production host: Homo sapiens (human)
References: UniProt: P28070, proteasome endopeptidase complex

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Protein , 1 types, 7 molecules OPQRSTU

#15: Protein
Proteasome activator protein PA26


Mass: 24959.373 Da / Num. of mol.: 7
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Trypanosoma brucei (eukaryote) / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: Q9U8G2

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1PA26-bound proteasomeCOMPLEXall0MULTIPLE SOURCES
2ProteasomeCOMPLEX#1-#141RECOMBINANT
3mutant PA26COMPLEX#151RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Trypanosoma brucei (eukaryote)5691
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-IDCell
12Homo sapiens (human)9606erythrocytes
23Escherichia coli BL21 (bacteria)511693
Buffer solutionpH: 7.6
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMHEPES1
225 mMsodium chlorideNaCl1
325 mMpotassium chlorideKCl1
41 mMTCEP1
50.05 % (w/v)Nonidet P-401
SpecimenConc.: 20 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R2/2
VitrificationInstrument: HOMEMADE PLUNGER / Cryogen name: ETHANE / Humidity: 90 % / Chamber temperature: 277 K
Details: Specimens were manually blotted with Whatman #1 filter paper.

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS / Details: Images were acquired in nanoprobe mode.
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 29000 X / Nominal defocus max: -2500 nm / Nominal defocus min: -1000 nm / Calibrated defocus min: -1500 nm / Calibrated defocus max: -3000 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 6.25 sec. / Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 11656
Image scansSampling size: 5 µm / Width: 3710 / Height: 3838 / Movie frames/image: 25 / Used frames/image: 1-25

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Processing

EM software
IDNameVersionCategory
1RELION2.1particle selection
2Leginon3.2image acquisition
4MotionCorr22CTF correction
5RELION2.1CTF correction
6CTFFIND4CTF correction
7GctfCTF correction
10UCSF Chimera1.12model fitting
11PHENIX1.11-2580model fitting
13RELION2.1initial Euler assignment
14RELION2.1final Euler assignment
16RELION2.13D reconstruction
17PHENIX1.11-2580model refinement
Image processingDetails: Camera was operated in counting mode.
CTF correctionDetails: CTF correction was performed by Relion during reconstruction.
Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 579361
Details: Particles were selected using the Relion template-based particle picker.
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 234960 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL

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