[English] 日本語
Yorodumi
- PDB-9yw2: Complex structure of human p97 bound to Faf1 and Ufd1 (NTD focused) -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 9yw2
TitleComplex structure of human p97 bound to Faf1 and Ufd1 (NTD focused)
Components
  • Glutathione S-transferase class-mu 26 kDa isozyme,FAS-associated factor 1
  • Transitional endoplasmic reticulum ATPase
  • Ubiquitin recognition factor in ER-associated degradation protein 1
KeywordsHYDROLASE / ATPase / p97 / AAA ATPase / ERAD / unfoldase / ubiquitin / segregase / VCP
Function / homology
Function and homology information


UFD1-NPL4 complex / Fas signaling pathway / negative regulation of RIG-I signaling pathway / CD95 death-inducing signaling complex / flavin adenine dinucleotide catabolic process / protein kinase regulator activity / VCP-NSFL1C complex / endoplasmic reticulum stress-induced pre-emptive quality control / endosome to lysosome transport via multivesicular body sorting pathway / BAT3 complex binding ...UFD1-NPL4 complex / Fas signaling pathway / negative regulation of RIG-I signaling pathway / CD95 death-inducing signaling complex / flavin adenine dinucleotide catabolic process / protein kinase regulator activity / VCP-NSFL1C complex / endoplasmic reticulum stress-induced pre-emptive quality control / endosome to lysosome transport via multivesicular body sorting pathway / BAT3 complex binding / cellular response to arsenite ion / cytoplasmic ubiquitin ligase complex / Derlin-1 retrotranslocation complex / positive regulation of protein K63-linked deubiquitination / protein-DNA covalent cross-linking repair / deubiquitinase activator activity / positive regulation of oxidative phosphorylation / cytoplasm protein quality control / regulation of protein localization to chromatin / ubiquitin-modified protein reader activity / cellular response to misfolded protein / mitotic spindle disassembly / VCP-NPL4-UFD1 AAA ATPase complex / positive regulation of mitochondrial membrane potential / regulation of protein catabolic process / vesicle-fusing ATPase / K48-linked polyubiquitin modification-dependent protein binding / NAD+ metabolic process / regulation of aerobic respiration / retrograde protein transport, ER to cytosol / stress granule disassembly / ATPase complex / negative regulation of type I interferon production / ubiquitin-specific protease binding / regulation of synapse organization / polyubiquitin modification-dependent protein binding / glutathione transferase / positive regulation of ATP biosynthetic process / ubiquitin-like protein ligase binding / glutathione transferase activity / intracellular membrane-bounded organelle / RHOH GTPase cycle / skeletal system development / autophagosome maturation / MHC class I protein binding / HSF1 activation / endoplasmic reticulum to Golgi vesicle-mediated transport / negative regulation of hippo signaling / mitophagy / NF-kappaB binding / interstrand cross-link repair / ATP metabolic process / proteasome complex / protein unfolding / endoplasmic reticulum unfolded protein response / ribosome-associated ubiquitin-dependent protein catabolic process / Attachment and Entry / ERAD pathway / heat shock protein binding / Protein methylation / translesion synthesis / negative regulation of smoothened signaling pathway / positive regulation of DNA replication / viral genome replication / negative regulation of protein localization to chromatin / macroautophagy / glutathione metabolic process / negative regulation of canonical NF-kappaB signal transduction / rescue of stalled cytosolic ribosome / lipid droplet / Josephin domain DUBs / autophagy / ubiquitin binding / establishment of protein localization / proteasomal protein catabolic process / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / positive regulation of protein-containing complex assembly / positive regulation of non-canonical NF-kappaB signal transduction / ADP binding / Hh mutants are degraded by ERAD / Dengue Virus Genome Translation and Replication / Translesion Synthesis by POLH / Hedgehog ligand biogenesis / Defective CFTR causes cystic fibrosis / AMPK-induced ERAD and lysosome mediated degradation of PD-L1(CD274) / ABC-family protein mediated transport / cytoplasmic stress granule / Ribosome Quality Control (RQC) complex extracts and degrades nascent peptide / double-strand break repair / Aggrephagy / positive regulation of canonical Wnt signaling pathway / positive regulation of protein catabolic process / azurophil granule lumen / Ovarian tumor domain proteases / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / nuclear envelope / KEAP1-NFE2L2 pathway / site of double-strand break / cellular response to heat / E3 ubiquitin ligases ubiquitinate target proteins
Similarity search - Function
FAS-associated factor 1-like, UBX domain / FAF1, UBA-like domain / : / Fas-associated factor 1 / UAS / : / UAS / Ubiquitin fusion degradation protein Ufd1-like / Ufd1-like, Nn domain / : ...FAS-associated factor 1-like, UBX domain / FAF1, UBA-like domain / : / Fas-associated factor 1 / UAS / : / UAS / Ubiquitin fusion degradation protein Ufd1-like / Ufd1-like, Nn domain / : / : / Ubiquitin fusion degradation protein UFD1, N-terminal subdomain 1 / Ubiquitin fusion degradation protein UFD1, N-terminal subdomain 2 / Domain present in ubiquitin-regulatory proteins / UBX domain / UBX domain / UBX domain profile. / UBA-like domain / Glutathione S-transferase, C-terminal domain / AAA ATPase, CDC48 family / : / CDC48, N-terminal subdomain / Cell division protein 48 (CDC48), N-terminal domain / Cell division protein 48 (CDC48) N-terminal domain / CDC48, domain 2 / Cell division protein 48 (CDC48) domain 2 / Cell division protein 48 (CDC48), domain 2 / : / CDC48 domain 2-like superfamily / Glutathione S-transferase, N-terminal domain / Glutathione S-transferase, C-terminal / Aspartate decarboxylase-like domain superfamily / Glutathione transferase family / Glutathione S-transferase, C-terminal-like / Soluble glutathione S-transferase C-terminal domain profile. / Soluble glutathione S-transferase N-terminal domain profile. / Glutathione S-transferase, N-terminal / Glutathione S-transferase, C-terminal domain superfamily / AAA ATPase, AAA+ lid domain / AAA+ lid domain / ATPase, AAA-type, conserved site / AAA-protein family signature. / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Thioredoxin-like superfamily / Ubiquitin-like domain superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Glutathione S-transferase class-mu 26 kDa isozyme / Transitional endoplasmic reticulum ATPase / Ubiquitin recognition factor in ER-associated degradation protein 1 / FAS-associated factor 1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.27 Å
AuthorsLiao, Z. / Arkinson, C. / Martin, A.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Cell Rep / Year: 2026
Title: Faf1 accelerates p97-mediated protein unfolding by promoting ubiquitin engagement.
Authors: Zengwei Liao / Connor Arkinson / Andreas Martin /
Abstract: P97/VCP is a protein unfoldase of the AAA+ ATPase family that plays essential roles in numerous processes, including ER-associated degradation and DNA replication. For unfolding of proteins modified ...P97/VCP is a protein unfoldase of the AAA+ ATPase family that plays essential roles in numerous processes, including ER-associated degradation and DNA replication. For unfolding of proteins modified with K48-linked ubiquitin chains, p97 works with the heterodimeric cofactor Ufd1-Npl4, and the cofactor Faf1 was shown to enhance this activity during replisome disassembly by unknown mechanisms. Here, we employ an in vitro reconstituted system with human components for biochemical experiments, FRET-based assays, and cryo-EM structure determination to reveal that Faf1 generally accelerates ubiquitin-dependent substrate processing by promoting the unfolding of an initiator ubiquitin and its engagement by the ATPase. Faf1 thereby uses its p97-bound C-terminal UBX domain to anchor a long helix that braces Ufd1's UT3 domain and stabilizes Ufd1-Npl4 for ubiquitin unfolding. Our findings demonstrate how p97 works simultaneously with several cofactors to facilitate the unfolding of ubiquitinated proteins, indicating more complex regulatory mechanisms than for the simpler yeast Cdc48.
History
DepositionOct 23, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 22, 2026Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 22, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jun 17, 2026Group: 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.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 / _em_admin.last_update
Revision 1.1Jun 17, 2026Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin
Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata
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 / _em_admin.last_update

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Transitional endoplasmic reticulum ATPase
H: Glutathione S-transferase class-mu 26 kDa isozyme,FAS-associated factor 1
I: Ubiquitin recognition factor in ER-associated degradation protein 1


Theoretical massNumber of molelcules
Total (without water)228,6443
Polymers228,6443
Non-polymers00
Water00
1


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

-
Components

#1: Protein Transitional endoplasmic reticulum ATPase / TER ATPase / 15S Mg(2+)-ATPase p97 subunit / Valosin-containing protein / VCP


Mass: 91177.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: VCP, HEL-220, HEL-S-70 / Production host: Escherichia coli (E. coli) / Strain (production host): Rosetta2 pLysS / References: UniProt: P55072, vesicle-fusing ATPase
#2: Protein Glutathione S-transferase class-mu 26 kDa isozyme,FAS-associated factor 1 / GST 26 / Sj26 antigen / SjGST / hFAF1 / UBX domain-containing protein 12 / UBX domain-containing protein 3A


Mass: 100807.102 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FAF1, UBXD12, UBXN3A, CGI-03 / Production host: Escherichia coli (E. coli) / Strain (production host): Rosetta2 pLysS
References: UniProt: P08515, UniProt: Q9UNN5, glutathione transferase
#3: Protein Ubiquitin recognition factor in ER-associated degradation protein 1 / Ubiquitin fusion degradation protein 1 / UB fusion protein 1


Mass: 36658.621 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: UFD1, UFD1L / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q92890
Has protein modificationN

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: ternary complex of human p97 bound to Faf1 and Ufd1 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.6
Buffer component
IDConc.NameFormulaBuffer-ID
150 mMHEPES1
2150 mMpotassium chlorideKCl1
35 mMmagnesium chlorideMgCl21
42 mMAdenosine 5'-O-(3-thio)triphosphateATPgammaS1
SpecimenConc.: 4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

-
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 magnification: 165000 X / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of grids imaged: 1

-
Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
2SerialEMimage acquisition
4cryoSPARCCTF correction
7UCSF ChimeraXmodel fitting
8ISOLDEmodel fitting
9Cootmodel fitting
11cryoSPARCinitial Euler assignment
12cryoSPARCfinal Euler assignment
13cryoSPARCclassification
14cryoSPARC3D reconstruction
15PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.27 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 943368 / Symmetry type: POINT
Atomic model buildingSpace: REAL
Atomic model buildingSource name: AlphaFold / Type: in silico model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0032653
ELECTRON MICROSCOPYf_angle_d0.7063576
ELECTRON MICROSCOPYf_dihedral_angle_d5.748358
ELECTRON MICROSCOPYf_chiral_restr0.047396
ELECTRON MICROSCOPYf_plane_restr0.005475

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more