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- PDB-8usb: Non-substrate-engaged human 26S proteasome with Nub1/FAT10 bound ... -

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Basic information

Entry
Database: PDB / ID: 8usb
TitleNon-substrate-engaged human 26S proteasome with Nub1/FAT10 bound to Rpn1
Components
  • (26S protease regulatory subunit ...) x 2
  • (26S proteasome non-ATPase regulatory subunit ...) x 11
  • (26S proteasome regulatory subunit ...) x 4
  • (Proteasome subunit alpha type- ...) x 7
  • 26S proteasome complex subunit SEM1
  • NEDD8 ultimate buster 1
  • Proteasome subunit beta type-7
KeywordsHYDROLASE/PROTEIN BINDING / 26S protease complex / Nub1 / FAT10 / MOTOR PROTEIN / HYDROLASE-PROTEIN BINDING complex
Function / homology
Function and homology information


regulation of ubiquitin-dependent protein catabolic process / positive regulation of inclusion body assembly / thyrotropin-releasing hormone receptor binding / modulation by host of viral transcription / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / cytosolic proteasome complex / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / integrator complex ...regulation of ubiquitin-dependent protein catabolic process / positive regulation of inclusion body assembly / thyrotropin-releasing hormone receptor binding / modulation by host of viral transcription / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / cytosolic proteasome complex / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / integrator complex / purine ribonucleoside triphosphate binding / meiosis I / proteasome regulatory particle / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, lid subcomplex / proteasome regulatory particle, base subcomplex / metal-dependent deubiquitinase activity / negative regulation of programmed cell death / protein K63-linked deubiquitination / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Cross-presentation of soluble exogenous antigens (endosomes) / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / proteasome core complex / Resolution of D-loop Structures through Holliday Junction Intermediates / Somitogenesis / K63-linked deubiquitinase activity / Impaired BRCA2 binding to RAD51 / proteasome binding / transcription factor binding / regulation of protein catabolic process / myofibril / proteasome storage granule / Presynaptic phase of homologous DNA pairing and strand exchange / response to tumor necrosis factor / general transcription initiation factor binding / response to type II interferon / blastocyst development / polyubiquitin modification-dependent protein binding / immune system process / positive regulation of RNA polymerase II transcription preinitiation complex assembly / protein deubiquitination / endopeptidase activator activity / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome assembly / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / mRNA export from nucleus / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / inclusion body / enzyme regulator activity / ERAD pathway / regulation of proteasomal protein catabolic process / proteasome complex / proteolysis involved in protein catabolic process / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / stem cell differentiation / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Degradation of DVL / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / lipopolysaccharide binding / Degradation of AXIN / Hh mutants are degraded by ERAD / negative regulation of inflammatory response to antigenic stimulus / P-body / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / G2/M Checkpoints / Defective CFTR causes cystic fibrosis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Vif-mediated degradation of APOBEC3G / Regulation of RUNX3 expression and activity / Hedgehog 'on' state / double-strand break repair via homologous recombination / 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
Similarity search - Function
NEDD8 ultimate buster 1 / NEDD8 ultimate buster 1, ubiquitin-like domain / Ubiquitin-like domain / : / UBA/TS-N domain / Ubiquitin interaction motif / : / 26S proteasome regulatory subunit RPN7/PSMD6 C-terminal helix / 26S proteasome non-ATPase regulatory subunit Rpn12 / 26S proteasome regulatory subunit, C-terminal ...NEDD8 ultimate buster 1 / NEDD8 ultimate buster 1, ubiquitin-like domain / Ubiquitin-like domain / : / UBA/TS-N domain / Ubiquitin interaction motif / : / 26S proteasome regulatory subunit RPN7/PSMD6 C-terminal helix / 26S proteasome non-ATPase regulatory subunit Rpn12 / 26S proteasome regulatory subunit, C-terminal / Proteasome regulatory subunit C-terminal / 26S proteasome regulatory subunit RPN5, C-terminal domain / : / 26S proteasome regulatory subunit RPN5 C-terminal domain / PSD13 N-terminal repeats / 26S proteasome regulatory subunit Rpn6, N-terminal / 6S proteasome subunit Rpn6, C-terminal helix domain / 26S proteasome regulatory subunit RPN6 N-terminal domain / 26S proteasome subunit RPN6 C-terminal helix domain / 26S Proteasome non-ATPase regulatory subunit 13 / : / 26S proteasome subunit RPN2, N-terminal domain / 26S proteasome regulatory complex, non-ATPase subcomplex, Rpn2/Psmd1 subunit / 26S proteasome regulatory subunit RPN2, C-terminal / 26S proteasome regulatory subunit RPN2 C-terminal domain / : / 26S proteasome regulatory subunit RPN11 C-terminal domain / DSS1/SEM1 / Proteasome subunit Rpn10 / 26S Proteasome non-ATPase regulatory subunit 7/8 / DSS1/SEM1 family / DSS1_SEM1 / 26S proteasome regulatory complex, non-ATPase subcomplex, Rpn1 subunit / RPN1, N-terminal / 26S proteasome non-ATPase regulatory subunit RPN1, C-terminal / RPN1 N-terminal domain / 26S proteasome non-ATPase regulatory subunit RPN1 C-terminal / : / 26S proteasome regulatory subunit 7, OB domain / : / : / : / PSMD12/CSN4, N-terminal / 26S proteasome regulatory subunit Rpn7/COP9 signalosome complex subunit 1 / 26S proteasome regulatory subunit Rpn7, N-terminal / 26S proteasome subunit RPN7 / 26S Proteasome non-ATPase regulatory subunit 12/COP9 signalosome complex subunit 4 / Proteasome/cyclosome repeat / Proteasome/cyclosome repeat / Ubiquitin-interacting motif. / PCI/PINT associated module / : / von Willebrand factor type A domain / Proteasomal ATPase OB C-terminal domain / Proteasomal ATPase OB C-terminal domain / CSN8/PSMD8/EIF3K / CSN8/PSMD8/EIF3K family / Proteasome subunit alpha 1 / Rpn11/EIF3F, C-terminal / Maintenance of mitochondrial structure and function / HEAT repeats / : / Ubiquitin associated domain / motif in proteasome subunits, Int-6, Nip-1 and TRIP-15 / PCI domain / Proteasome component (PCI) domain / PCI domain profile. / Ubiquitin-associated domain / Ubiquitin-associated domain (UBA) profile. / Ubiquitin interacting motif / Ubiquitin-interacting motif (UIM) domain profile. / UBA-like superfamily / JAB1/Mov34/MPN/PAD-1 ubiquitin protease / 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 / von Willebrand factor (vWF) type A domain / VWFA domain profile. / Proteasome B-type subunit / Proteasome beta-type subunit profile. / : / Proteasome alpha-type subunit / Proteasome alpha-type subunit profile. / Proteasome subunit / Proteasome, subunit alpha/beta / von Willebrand factor, type A / AAA ATPase, AAA+ lid domain / AAA+ lid domain / JAB/MPN domain / JAB1/MPN/MOV34 metalloenzyme domain / ATPase, AAA-type, conserved site / AAA-protein family signature.
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / ADENOSINE-5'-TRIPHOSPHATE / 26S proteasome non-ATPase regulatory subunit 11 / 26S proteasome non-ATPase regulatory subunit 12 / 26S proteasome non-ATPase regulatory subunit 14 / Proteasome subunit alpha type-7 / 26S proteasome non-ATPase regulatory subunit 3 / 26S proteasome regulatory subunit 6A / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 ...ADENOSINE-5'-DIPHOSPHATE / ADENOSINE-5'-TRIPHOSPHATE / 26S proteasome non-ATPase regulatory subunit 11 / 26S proteasome non-ATPase regulatory subunit 12 / 26S proteasome non-ATPase regulatory subunit 14 / Proteasome subunit alpha type-7 / 26S proteasome non-ATPase regulatory subunit 3 / 26S proteasome regulatory subunit 6A / 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 / 26S proteasome regulatory subunit 7 / 26S proteasome regulatory subunit 6B / 26S proteasome non-ATPase regulatory subunit 8 / 26S proteasome non-ATPase regulatory subunit 7 / 26S proteasome non-ATPase regulatory subunit 4 / 26S proteasome complex subunit SEM1 / Proteasome subunit alpha type-6 / 26S proteasome regulatory subunit 4 / 26S proteasome regulatory subunit 8 / 26S proteasome regulatory subunit 10B / 26S proteasome non-ATPase regulatory subunit 2 / 26S proteasome non-ATPase regulatory subunit 6 / Proteasome subunit beta type-7 / 26S proteasome non-ATPase regulatory subunit 1 / 26S proteasome non-ATPase regulatory subunit 13 / NEDD8 ultimate buster 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.73 Å
AuthorsArkinson, C. / Gee, C.L. / Martin, A.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nat Struct Mol Biol / Year: 2025
Title: NUB1 traps unfolded FAT10 for ubiquitin-independent degradation by the 26S proteasome.
Authors: Connor Arkinson / Ken C Dong / Christine L Gee / Shawn M Costello / Aimee Chi Soe / Greg L Hura / Susan Marqusee / Andreas Martin /
Abstract: The ubiquitin-like modifier FAT10 targets hundreds of proteins in the mammalian immune system to the 26S proteasome for degradation. This degradation pathway requires the cofactor NUB1, yet the ...The ubiquitin-like modifier FAT10 targets hundreds of proteins in the mammalian immune system to the 26S proteasome for degradation. This degradation pathway requires the cofactor NUB1, yet the underlying mechanisms remain unknown. Here, we reconstituted a minimal in vitro system with human components and revealed that NUB1 uses the intrinsic instability of FAT10 to trap its N-terminal ubiquitin-like domain in an unfolded state and deliver it to the 26S proteasome for engagement, allowing the degradation of FAT10-ylated substrates in a ubiquitin-independent and p97-independent manner. Using hydrogen-deuterium exchange, structural modeling and site-directed mutagenesis, we identified the formation of an intricate complex with FAT10 that activates NUB1 for docking to the 26S proteasome, and our cryo-EM studies visualized the highly dynamic NUB1 complex bound to the proteasomal Rpn1 subunit during FAT10 delivery and the early stages of ATP-dependent degradation. These findings identified a previously unknown mode of cofactor-mediated, ubiquitin-independent substrate delivery to the 26S proteasome that relies on trapping partially unfolded states for engagement by the proteasomal ATPase motor.
History
DepositionOct 27, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 6, 2024Provider: repository / Type: Initial release
Revision 1.1Nov 27, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update
Revision 1.2Apr 23, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
W: 26S proteasome non-ATPase regulatory subunit 12
C: 26S protease regulatory subunit 8
b: 26S proteasome non-ATPase regulatory subunit 4
d: 26S proteasome non-ATPase regulatory subunit 8
f: 26S proteasome non-ATPase regulatory subunit 2
g: NEDD8 ultimate buster 1
B: 26S proteasome regulatory subunit 4
A: 26S proteasome regulatory subunit 7
D: 26S proteasome regulatory subunit 6B
E: 26S protease regulatory subunit 10B
F: 26S proteasome regulatory subunit 6A
G: Proteasome subunit alpha type-6
H: Proteasome subunit alpha type-2
I: Proteasome subunit alpha type-4
J: Proteasome subunit alpha type-7
K: Proteasome subunit alpha type-5
L: Proteasome subunit alpha type-1
M: Proteasome subunit alpha type-3
O: Proteasome subunit beta type-7
U: 26S proteasome non-ATPase regulatory subunit 1
V: 26S proteasome non-ATPase regulatory subunit 3
c: 26S proteasome non-ATPase regulatory subunit 14
e: 26S proteasome complex subunit SEM1
Y: 26S proteasome non-ATPase regulatory subunit 6
Z: 26S proteasome non-ATPase regulatory subunit 7
a: 26S proteasome non-ATPase regulatory subunit 13
X: 26S proteasome non-ATPase regulatory subunit 11
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,211,81740
Polymers1,208,64227
Non-polymers3,17413
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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26S proteasome non-ATPase regulatory subunit ... , 11 types, 11 molecules WbdfUVcYZaX

#1: Protein 26S proteasome non-ATPase regulatory subunit 12 / 26S proteasome regulatory subunit RPN5 / 26S proteasome regulatory subunit p55


Mass: 52979.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O00232
#3: Protein 26S proteasome non-ATPase regulatory subunit 4 / 26S proteasome regulatory subunit RPN10 / 26S proteasome regulatory subunit S5A / Antisecretory ...26S proteasome regulatory subunit RPN10 / 26S proteasome regulatory subunit S5A / Antisecretory factor 1 / ASF / Multiubiquitin chain-binding protein


Mass: 40781.590 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P55036
#4: Protein 26S proteasome non-ATPase regulatory subunit 8 / 26S proteasome regulatory subunit RPN12 / 26S proteasome regulatory subunit S14 / p31


Mass: 39667.871 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P48556
#5: Protein 26S proteasome non-ATPase regulatory subunit 2 / 26S proteasome regulatory subunit RPN1 / 26S proteasome regulatory subunit S2 / 26S proteasome ...26S proteasome regulatory subunit RPN1 / 26S proteasome regulatory subunit S2 / 26S proteasome subunit p97 / Protein 55.11 / Tumor necrosis factor type 1 receptor-associated protein 2


Mass: 100313.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q13200
#20: Protein 26S proteasome non-ATPase regulatory subunit 1 / 26S proteasome regulatory subunit RPN2 / 26S proteasome regulatory subunit S1 / 26S proteasome subunit p112


Mass: 105958.234 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q99460
#21: Protein 26S proteasome non-ATPase regulatory subunit 3 / 26S proteasome regulatory subunit RPN3 / 26S proteasome regulatory subunit S3 / Proteasome subunit p58


Mass: 61066.500 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: O43242
#22: Protein 26S proteasome non-ATPase regulatory subunit 14


Mass: 46940.898 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: The human cell line has been modified with a retrovirus to incorporate the non-ATPase regulatory subunit 14 with i an affinity tag comprising HTBH (6-His, TEV, biotin, 6-His) at the C- ...Details: The human cell line has been modified with a retrovirus to incorporate the non-ATPase regulatory subunit 14 with i an affinity tag comprising HTBH (6-His, TEV, biotin, 6-His) at the C-terminus https://doi.org/10.1021/bi061994u
Source: (gene. exp.) Homo sapiens (human) / Cell line: HEK293 / Gene: PSMD14 / Production host: Homo sapiens (human) / References: UniProt: O00487
#24: Protein 26S proteasome non-ATPase regulatory subunit 6 / 26S proteasome regulatory subunit RPN7 / 26S proteasome regulatory subunit S10 / Breast cancer- ...26S proteasome regulatory subunit RPN7 / 26S proteasome regulatory subunit S10 / Breast cancer-associated protein SGA-113M / Phosphonoformate immuno-associated protein 4 / Proteasome regulatory particle subunit p44S10 / p42A


Mass: 45592.285 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q15008
#25: Protein 26S proteasome non-ATPase regulatory subunit 7 / 26S proteasome regulatory subunit RPN8 / 26S proteasome regulatory subunit S12 / Mov34 protein ...26S proteasome regulatory subunit RPN8 / 26S proteasome regulatory subunit S12 / Mov34 protein homolog / Proteasome subunit p40


Mass: 37086.441 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P51665
#26: Protein 26S proteasome non-ATPase regulatory subunit 13 / 26S proteasome regulatory subunit RPN9 / 26S proteasome regulatory subunit S11 / 26S proteasome ...26S proteasome regulatory subunit RPN9 / 26S proteasome regulatory subunit S11 / 26S proteasome regulatory subunit p40.5


Mass: 42995.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q9UNM6
#27: Protein 26S proteasome non-ATPase regulatory subunit 11 / 26S proteasome regulatory subunit RPN6 / 26S proteasome regulatory subunit S9 / 26S proteasome ...26S proteasome regulatory subunit RPN6 / 26S proteasome regulatory subunit S9 / 26S proteasome regulatory subunit p44.5


Mass: 47526.688 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: O00231

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26S protease regulatory subunit ... , 2 types, 2 molecules CE

#2: Protein 26S protease regulatory subunit 8 / 26S proteasome AAA-ATPase subunit RPT6 / Proteasome 26S subunit ATPase 5 / Proteasome subunit p45 / ...26S proteasome AAA-ATPase subunit RPT6 / Proteasome 26S subunit ATPase 5 / Proteasome subunit p45 / Thyroid hormone receptor-interacting protein 1 / TRIP1 / p45/SUG


Mass: 45694.047 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62195
#10: Protein 26S protease regulatory subunit 10B / 26S proteasome AAA-ATPase subunit RPT4 / Proteasome 26S subunit ATPase 6 / Proteasome subunit p42


Mass: 44241.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62333

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Protein , 3 types, 3 molecules gOe

#6: Protein NEDD8 ultimate buster 1


Mass: 69542.938 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: NUB1 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9Y5A7
#19: Protein Proteasome subunit beta type-7 / Macropain chain Z / Multicatalytic endopeptidase complex chain Z / Proteasome subunit Z


Mass: 30000.418 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: Q99436, proteasome endopeptidase complex
#23: Protein 26S proteasome complex subunit SEM1 / 26S proteasome complex subunit DSS1 / Deleted in split hand/split foot protein 1 / Split hand/foot ...26S proteasome complex subunit DSS1 / Deleted in split hand/split foot protein 1 / Split hand/foot deleted protein 1 / Split hand/foot malformation type 1 protein


Mass: 8284.611 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK203 / References: UniProt: P60896

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26S proteasome regulatory subunit ... , 4 types, 4 molecules BADF

#7: Protein 26S proteasome regulatory subunit 4 / P26s4 / 26S proteasome AAA-ATPase subunit RPT2 / Proteasome 26S subunit ATPase 1


Mass: 49260.504 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62191
#8: Protein 26S proteasome regulatory subunit 7 / 26S proteasome AAA-ATPase subunit RPT1 / Proteasome 26S subunit ATPase 2 / Protein MSS1


Mass: 48700.805 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P35998
#9: Protein 26S proteasome regulatory subunit 6B / 26S proteasome AAA-ATPase subunit RPT3 / MB67-interacting protein / MIP224 / Proteasome 26S subunit ...26S proteasome AAA-ATPase subunit RPT3 / MB67-interacting protein / MIP224 / Proteasome 26S subunit ATPase 4 / Tat-binding protein 7 / TBP-7


Mass: 47426.141 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P43686
#11: Protein 26S proteasome regulatory subunit 6A / 26S proteasome AAA-ATPase subunit RPT5 / Proteasome 26S subunit ATPase 3 / Proteasome subunit P50 / ...26S proteasome AAA-ATPase subunit RPT5 / Proteasome 26S subunit ATPase 3 / Proteasome subunit P50 / Tat-binding protein 1 / TBP-1


Mass: 49266.457 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P17980

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

#12: 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: 27432.459 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: P60900, proteasome endopeptidase complex
#13: Protein Proteasome subunit alpha type-2 / Macropain subunit C3 / Multicatalytic endopeptidase complex subunit C3 / Proteasome component C3


Mass: 25927.535 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: P25787, proteasome endopeptidase complex
#14: 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: 29525.842 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: P25789, proteasome endopeptidase complex
#15: Protein Proteasome subunit alpha type-7 / Proteasome subunit RC6-1 / Proteasome subunit XAPC7


Mass: 27929.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: O14818, proteasome endopeptidase complex
#16: Protein Proteasome subunit alpha type-5 / Macropain zeta chain / Multicatalytic endopeptidase complex zeta chain / Proteasome zeta chain


Mass: 26435.977 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)
References: UniProt: P28066, proteasome endopeptidase complex
#17: 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: 29595.627 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: P25786, proteasome endopeptidase complex
#18: Protein Proteasome subunit alpha type-3 / Macropain subunit C8 / Multicatalytic endopeptidase complex subunit C8 / Proteasome component C8


Mass: 28469.252 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293
References: UniProt: P25788, proteasome endopeptidase complex

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Non-polymers , 4 types, 13 molecules

#28: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: ADP, energy-carrying molecule*YM
#29: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#30: Chemical
ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP, energy-carrying molecule*YM
#31: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationY
Sequence detailsThe human cell line has been modified with a retrovirus to incorporate the non-ATPase regulatory ...The human cell line has been modified with a retrovirus to incorporate the non-ATPase regulatory subunit 14 with i an affinity tag comprising HTBH (6-His, TEV, biotin, 6-His) at the C-terminus https://doi.org/10.1021/bi061994u

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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
IDNameTypeDetailsEntity IDParent-IDSource
126S proteasome complex bound to Nub1COMPLEXNub1/FAT10 complex combined with 26S proteasome for 30 seconds. Nub1/FAT10 were expressed in E.coli and the proteasome was purified from human HEK293 cells#1-#270NATURAL
2Nub1 UBL1COMPLEX#61RECOMBINANT
Molecular weight
IDEntity assembly-IDValue (°)Experimental value
112.6 MDaNO
21NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)866768
32Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)866768
Buffer solutionpH: 7.4
Details: 30 mM HEPES pH7.4, 25 mM NaCl, 25 mM KCl, 3% (v/v) glycerol, 5 mM MgCl2 2 mM ATP and 0.5 mM TCEP
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: 25 mA / Grid material: GOLD / Grid mesh size: 500 divisions/in. / Grid type: UltrAuFoil R2/2
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1700 nm / Nominal defocus min: 500 nm / Alignment procedure: BASIC
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.21_5207 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.73 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 50918 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 126.98 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.002671318
ELECTRON MICROSCOPYf_angle_d0.530996349
ELECTRON MICROSCOPYf_chiral_restr0.039710984
ELECTRON MICROSCOPYf_plane_restr0.003512396
ELECTRON MICROSCOPYf_dihedral_angle_d6.26269805

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