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- EMDB-28986: Focused map of p97:UBXD1 open state (P6 protomer) -

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Open data


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Basic information

Entry
Database: EMDB / ID: EMD-28986
TitleFocused map of p97:UBXD1 open state (P6 protomer)
Map data
Sample
  • Complex: Complex of p97 and UBXD1
    • Protein or peptide: Transitional endoplasmic reticulum ATPase
    • Protein or peptide: UBX domain-containing protein 6
KeywordsAAA+ / chaperone / hydrolase
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.52 Å
AuthorsBraxton JR / Tucker MR / Tse E / Southworth DR
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM138690 United States
CitationJournal: bioRxiv / Year: 2023
Title: The p97/VCP adapter UBXD1 drives AAA+ remodeling and ring opening through multi-domain tethered interactions.
Authors: Julian R Braxton / Chad R Altobelli / Maxwell R Tucker / Eric Tse / Aye C Thwin / Michelle R Arkin / Daniel R Southworth /
Abstract: p97/VCP is an essential cytosolic AAA+ ATPase hexamer that extracts and unfolds substrate polypeptides during protein homeostasis and degradation. Distinct sets of p97 adapters guide cellular ...p97/VCP is an essential cytosolic AAA+ ATPase hexamer that extracts and unfolds substrate polypeptides during protein homeostasis and degradation. Distinct sets of p97 adapters guide cellular functions but their roles in direct control of the hexamer are unclear. The UBXD1 adapter localizes with p97 in critical mitochondria and lysosome clearance pathways and contains multiple p97-interacting domains. We identify UBXD1 as a potent p97 ATPase inhibitor and report structures of intact p97:UBXD1 complexes that reveal extensive UBXD1 contacts across p97 and an asymmetric remodeling of the hexamer. Conserved VIM, UBX, and PUB domains tether adjacent protomers while a connecting strand forms an N-terminal domain lariat with a helix wedged at the interprotomer interface. An additional VIM-connecting helix binds along the second AAA+ domain. Together these contacts split the hexamer into a ring-open conformation. Structures, mutagenesis, and comparisons to other adapters further reveal how adapters containing conserved p97-remodeling motifs regulate p97 ATPase activity and structure.
History
DepositionDec 1, 2022-
Header (metadata) releaseJun 21, 2023-
Map releaseJun 21, 2023-
UpdateJun 21, 2023-
Current statusJun 21, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_28986.png

Downloads & links

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Map

FileDownload / File: emd_28986.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.834 Å
Density
Contour LevelBy AUTHOR: 0.5
Minimum - Maximum-1.7488178 - 2.5229669
Average (Standard dev.)-0.0014635273 (±0.046035063)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 333.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Unsharpened map

Fileemd_28986_additional_1.map
AnnotationUnsharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_28986_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_28986_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Complex of p97 and UBXD1

EntireName: Complex of p97 and UBXD1
Components
  • Complex: Complex of p97 and UBXD1
    • Protein or peptide: Transitional endoplasmic reticulum ATPase
    • Protein or peptide: UBX domain-containing protein 6

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Supramolecule #1: Complex of p97 and UBXD1

SupramoleculeName: Complex of p97 and UBXD1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Transitional endoplasmic reticulum ATPase

MacromoleculeName: Transitional endoplasmic reticulum ATPase / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO / EC number: vesicle-fusing ATPase
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MASGADSKGD DLSTAILKQK NRPNRLIVDE AINEDNSVVS LSQPKMDELQ LFRGDTVLLK GKKRREAVCI VLSDDTCSDE KIRMNRVVRN NLRVRLGDVI SIQPCPDVKY GKRIHVLPID DTVEGITGNL FEVYLKPYFL EAYRPIRKGD IFLVRGGMRA VEFKVVETDP ...String:
MASGADSKGD DLSTAILKQK NRPNRLIVDE AINEDNSVVS LSQPKMDELQ LFRGDTVLLK GKKRREAVCI VLSDDTCSDE KIRMNRVVRN NLRVRLGDVI SIQPCPDVKY GKRIHVLPID DTVEGITGNL FEVYLKPYFL EAYRPIRKGD IFLVRGGMRA VEFKVVETDP SPYCIVAPDT VIHCEGEPIK REDEEESLNE VGYDDIGGCR KQLAQIKEMV ELPLRHPALF KAIGVKPPRG ILLYGPPGTG KTLIARAVAN ETGAFFFLIN GPEIMSKLAG ESESNLRKAF EEAEKNAPAI IFIDELDAIA PKREKTHGEV ERRIVSQLLT LMDGLKQRAH VIVMAATNRP NSIDPALRRF GRFDREVDIG IPDATGRLEI LQIHTKNMKL ADDVDLEQVA NETHGHVGAD LAALCSEAAL QAIRKKMDLI DLEDETIDAE VMNSLAVTMD DFRWALSQSN PSALRETVVE VPQVTWEDIG GLEDVKRELQ ELVQYPVEHP DKFLKFGMTP SKGVLFYGPP GCGKTLLAKA IANECQANFI SIKGPELLTM WFGESEANVR EIFDKARQAA PCVLFFDELD SIAKARGGNI GDGGGAADRV INQILTEMDG MSTKKNVFII GATNRPDIID PAILRPGRLD QLIYIPLPDE KSRVAILKAN LRKSPVAKDV DLEFLAKMTN GFSGADLTEI CQRACKLAIR ESIESEIRRE RERQTNPSAM EVEEDDPVPE IRRDHFEEAM RFARRSVSDN DIRKYEMFAQ TLQQSRGFGS FRFPSGNQGG AGPSQGSGGG TGGSVYTEDN DDDLYG

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Macromolecule #2: UBX domain-containing protein 6

MacromoleculeName: UBX domain-containing protein 6 / type: protein_or_peptide / ID: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MKKFFQEFKA DIKFKSAGPG QKLKESVGEK AHKEKPNQPA PRPPRQGPTN EAQMAAAAAL ARLEQKQSRA WGPTSQDTIR NQVRKELQAE ATVSGSPEAP GTNVVSEPRE EGSAHLAVPG VYFTCPLTGA TLRKDQRDAC IKEAILLHFS TDPVAASIMK IYTFNKDQDR ...String:
MKKFFQEFKA DIKFKSAGPG QKLKESVGEK AHKEKPNQPA PRPPRQGPTN EAQMAAAAAL ARLEQKQSRA WGPTSQDTIR NQVRKELQAE ATVSGSPEAP GTNVVSEPRE EGSAHLAVPG VYFTCPLTGA TLRKDQRDAC IKEAILLHFS TDPVAASIMK IYTFNKDQDR VKLGVDTIAK YLDNIHLHPE EEKYRKIKLQ NKVFQERINC LEGTHEFFEA IGFQKVLLPA QDQEDPEEFY VLSETTLAQP QSLERHKEQL LAAEPVRAKL DRQRRVFQPS PLASQFELPG DFFNLTAEEI KREQRLRSEA VERLSVLRTK AMREKEEQRG LRKYNYTLLR VRLPDGCLLQ GTFYARERLG AVYGFVREAL QSDWLPFELL ASGGQKLSED ENLALNECGL VPSALLTFSW DMAVLEDIKA AGAEPDSILK PELLSAIEKL L

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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

Concentration1.89 mg/mL
BufferpH: 7.4
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 200 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.03 kPa / Details: Pelco easiGlow, 15 mA
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: Wait time 10 sec, blot time 3 sec, blot force 0.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Calibrated magnification: 59952 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 105000
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 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 / Number real images: 22536 / Average exposure time: 2.024 sec. / Average electron dose: 43.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: Ab initio reconstruction from cryoSPARC
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.52 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 168782

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Atomic model buiding 1

RefinementProtocol: FLEXIBLE FIT

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