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- PDB-9oa0: The human PHB1/2 complex (open) -

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Basic information

Entry
Database: PDB / ID: 9oa0
TitleThe human PHB1/2 complex (open)
Components
  • Prohibitin 1
  • Prohibitin-2
KeywordsMEMBRANE PROTEIN / SPFH / Mitochondria / PHB1 / PHB2
Function / homology
Function and homology information


complement component C3a binding / mitochondrial prohibitin complex / regulation of cardiolipin metabolic process / regulation of cytochrome-c oxidase activity / : / host-mediated perturbation of viral RNA genome replication / proteinase activated receptor binding / regulation of branching involved in mammary gland duct morphogenesis / negative regulation of nuclear receptor-mediated glucocorticoid signaling pathway / negative regulation of mammary gland epithelial cell proliferation ...complement component C3a binding / mitochondrial prohibitin complex / regulation of cardiolipin metabolic process / regulation of cytochrome-c oxidase activity / : / host-mediated perturbation of viral RNA genome replication / proteinase activated receptor binding / regulation of branching involved in mammary gland duct morphogenesis / negative regulation of nuclear receptor-mediated glucocorticoid signaling pathway / negative regulation of mammary gland epithelial cell proliferation / sphingolipid binding / Processing of SMDT1 / T-helper 17 type immune response / Cellular response to mitochondrial stress / RIG-I signaling pathway / positive regulation of complement activation / complement component C3b binding / mammary gland branching involved in thelarche / negative regulation of intracellular estrogen receptor signaling pathway / negative regulation of androgen receptor signaling pathway / negative regulation of transcription by competitive promoter binding / positive regulation of G protein-coupled receptor signaling pathway / cellular response to interleukin-6 / mammary gland epithelial cell proliferation / sister chromatid cohesion / DNA biosynthetic process / positive regulation of immunoglobulin production / positive regulation of interleukin-17 production / B cell activation / progesterone receptor signaling pathway / mammary gland alveolus development / : / : / mitophagy / estrogen receptor signaling pathway / positive regulation of smooth muscle cell proliferation / antiviral innate immune response / epigenetic regulation of gene expression / nuclear estrogen receptor binding / cell periphery / mitochondrion organization / RAF activation / positive regulation of non-canonical NF-kappaB signal transduction / negative regulation of cell growth / negative regulation of protein catabolic process / negative regulation of ERK1 and ERK2 cascade / histone deacetylase binding / nuclear matrix / protein import into nucleus / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / osteoblast differentiation / transcription corepressor activity / cell migration / positive regulation of neuron apoptotic process / regulation of apoptotic process / early endosome / mitochondrial outer membrane / positive regulation of ERK1 and ERK2 cascade / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / mitochondrial inner membrane / protein stabilization / protein heterodimerization activity / negative regulation of cell population proliferation / negative regulation of DNA-templated transcription / positive regulation of gene expression / regulation of DNA-templated transcription / symbiont entry into host cell / negative regulation of apoptotic process / positive regulation of DNA-templated transcription / enzyme binding / cell surface / negative regulation of transcription by RNA polymerase II / signal transduction / protein homodimerization activity / protein-containing complex / mitochondrion / extracellular exosome / nucleoplasm / identical protein binding / nucleus / membrane / plasma membrane / cytoplasm
Similarity search - Function
Prohibitin / Band 7 domain / SPFH domain / Band 7 family / prohibitin homologues / Band 7/SPFH domain superfamily
Similarity search - Domain/homology
Prohibitin 1 / Prohibitin-2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsGao, J. / Shao, S. / Sherpa, D. / Kupko, N.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute on Aging (NIH/NIA)AG073277 United States
David and Lucile Packard Foundation United States
Richard and Susan Smith Family Foundation United States
CitationJournal: Nat Commun / Year: 2025
Title: Structures of human organellar SPFH protein complexes.
Authors: Jingjing Gao / Dawafuti Sherpa / Nikita Kupko / Haruka Chino / Jianwei Zeng / Sichen Shao /
Abstract: Stomatin, Prohibitin, Flotillin, and HflK/C (SPFH) family proteins are found in all kingdoms of life and in multiple eukaryotic organelles. SPFH proteins assemble into homo- or hetero-oligomeric ...Stomatin, Prohibitin, Flotillin, and HflK/C (SPFH) family proteins are found in all kingdoms of life and in multiple eukaryotic organelles. SPFH proteins assemble into homo- or hetero-oligomeric rings that form domed structures. Most SPFH assemblies also abut a cellular membrane, where they are implicated in diverse functions ranging from membrane organization to protein quality control. However, the precise architectures of different SPFH complexes remain unclear. Here, we report single-particle cryo-EM structures of the endoplasmic reticulum (ER)-resident Erlin1/2 complex and the mitochondrial prohibitin (PHB1/2) complex, revealing assemblies of 13 heterodimers of Erlin1 and Erlin2 and 11 heterodimers of PHB1 and PHB2, respectively. We also describe key interactions underlying the architecture of each complex and conformational heterogeneity of the PHB1/2 complex. Our findings elucidate the distinct stoichiometries and properties of human organellar SPFH complexes and highlight common principles of SPFH complex organization.
History
DepositionApr 18, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 22, 2025Provider: repository / Type: Initial release
Revision 1.0Oct 22, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Oct 22, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
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Revision 1.0Oct 22, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Oct 22, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
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Revision 1.1Dec 24, 2025Data 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
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Prohibitin 1
B: Prohibitin 1
C: Prohibitin 1
D: Prohibitin 1
E: Prohibitin 1
F: Prohibitin 1
G: Prohibitin 1
H: Prohibitin 1
I: Prohibitin 1
J: Prohibitin 1
K: Prohibitin 1
a: Prohibitin-2
b: Prohibitin-2
c: Prohibitin-2
d: Prohibitin-2
e: Prohibitin-2
f: Prohibitin-2
g: Prohibitin-2
h: Prohibitin-2
i: Prohibitin-2
j: Prohibitin-2
k: Prohibitin-2


Theoretical massNumber of molelcules
Total (without water)732,93022
Polymers732,93022
Non-polymers00
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

#1: Protein
Prohibitin 1


Mass: 33288.652 Da / Num. of mol.: 11
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PHB1, PHB / Production host: Homo sapiens (human) / References: UniProt: P35232
#2: Protein
Prohibitin-2 / B-cell receptor-associated protein BAP37 / D-prohibitin / Repressor of estrogen receptor activity


Mass: 33341.355 Da / Num. of mol.: 11
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PHB2, BAP, REA / Production host: Homo sapiens (human) / References: UniProt: Q99623
Has protein modificationN

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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

ComponentName: Human PHB1/2 complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: 2000 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C11 (11 fold cyclic)
3D reconstructionResolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 7010 / Symmetry type: POINT

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