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- PDB-6wr4: Structure of human ATG9A, the only transmembrane protein of the c... -

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Basic information

Entry
Database: PDB / ID: 6wr4
TitleStructure of human ATG9A, the only transmembrane protein of the core autophagy machinery
ComponentsAutophagy-related protein 9A
KeywordsMEMBRANE PROTEIN / TG9A / autophagosome / autophagy / cryoEM / molecular dynamics / transmembrane protein / membranecurvature / cellular compartments / membrane morphology / lipids
Function / homology
Function and homology information


late nucleophagy / protein localization to phagophore assembly site / phagophore assembly site / autophagy of mitochondrion / autophagosome assembly / autophagosome / late endosome membrane / recycling endosome / trans-Golgi network / protein transport ...late nucleophagy / protein localization to phagophore assembly site / phagophore assembly site / autophagy of mitochondrion / autophagosome assembly / autophagosome / late endosome membrane / recycling endosome / trans-Golgi network / protein transport / late endosome / endosome / intracellular membrane-bounded organelle / endoplasmic reticulum membrane / membrane / integral component of membrane
Autophagy-related protein 9
Autophagy-related protein 9A
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsGuardia, C.M. / Tan, X. / Lian, T. / Rana, M.S. / Zhou, W. / Christenson, E.T. / Lowry, A.J. / Faraldo-Gomez, J.D. / Bonifacino, J.S. / Jiang, J. / Banerjee, A.
CitationJournal: Cell Rep / Year: 2020
Title: Structure of Human ATG9A, the Only Transmembrane Protein of the Core Autophagy Machinery.
Authors: Carlos M Guardia / Xiao-Feng Tan / Tengfei Lian / Mitra S Rana / Wenchang Zhou / Eric T Christenson / Augustus J Lowry / José D Faraldo-Gómez / Juan S Bonifacino / Jiansen Jiang / Anirban Banerjee /
Abstract: Autophagy is a catabolic process involving capture of cytoplasmic materials into double-membraned autophagosomes that subsequently fuse with lysosomes for degradation of the materials by lysosomal ...Autophagy is a catabolic process involving capture of cytoplasmic materials into double-membraned autophagosomes that subsequently fuse with lysosomes for degradation of the materials by lysosomal hydrolases. One of the least understood components of the autophagy machinery is the transmembrane protein ATG9. Here, we report a cryoelectron microscopy structure of the human ATG9A isoform at 2.9-Å resolution. The structure reveals a fold with a homotrimeric domain-swapped architecture, multiple membrane spans, and a network of branched cavities, consistent with ATG9A being a membrane transporter. Mutational analyses support a role for the cavities in the function of ATG9A. In addition, structure-guided molecular simulations predict that ATG9A causes membrane bending, explaining the localization of this protein to small vesicles and highly curved edges of growing autophagosomes.
Validation Report
SummaryFull reportAbout validation report
History
DepositionApr 29, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 8, 2020Provider: repository / Type: Initial release
Revision 1.1Jul 15, 2020Group: Database references / Category: citation / citation_author
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.name

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Structure visualization

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Assembly

Deposited unit
A: Autophagy-related protein 9A
B: Autophagy-related protein 9A
C: Autophagy-related protein 9A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)289,6849
Polymers283,6533
Non-polymers6,0316
Water0
1


TypeNameSymmetry operationNumber
identity operation1_5551
Buried area10650 Å2
ΔGint-90 kcal/mol
Surface area69360 Å2

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Components

#1: Protein Autophagy-related protein 9A / APG9-like 1 / mATG9


Mass: 94551.031 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ATG9A, APG9L1 / Production host: Homo sapiens (human) / References: UniProt: Q7Z3C6
#2: Chemical
ChemComp-LMN / Lauryl Maltose Neopentyl Glycol / 2,2-didecylpropane-1,3-bis-b-D-maltopyranoside


Mass: 1005.188 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C47H88O22 / Feature type: SUBJECT OF INVESTIGATION / Comment: detergent*YM
Has ligand of interestY

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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: Autophagy Related 9A with LMNG / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: unspecified
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / C2 aperture diameter: 70 µm
Image recordingElectron dose: 57 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

Software
NameVersionClassificationNB
PHENIX(1.13_2998:phenix.real_space_refine)refinement
PDB_EXTRACT3.25data extraction
CTF correctionType: NONE
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 646291 / Symmetry type: POINT
RefinementCross valid method: THROUGHOUT
Displacement parametersBiso max: 0 Å2 / Biso mean: 0 Å2 / Biso min: 0 Å2

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