5JM6

Structure of Chaetomium thermophilum mApe1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Higher-order assemblies of oligomeric cargo receptor complexes form the membrane scaffold of the Cvt vesicle.

Bertipaglia, C.Schneider, S.Jakobi, A.J.Tarafder, A.K.Bykov, Y.S.Picco, A.Kukulski, W.Kosinski, J.Hagen, W.J.Ravichandran, A.C.Wilmanns, M.Kaksonen, M.Briggs, J.A.Sachse, C.

(2016) EMBO Rep 17: 1044-1060

  • DOI: 10.15252/embr.201541960
  • Primary Citation of Related Structures:  
    5JM0, 5JM6, 5JM9

  • PubMed Abstract: 
  • Selective autophagy is the mechanism by which large cargos are specifically sequestered for degradation. The structural details of cargo and receptor assembly giving rise to autophagic vesicles remain to be elucidated. We utilize the yeast cytoplasm-to-vacuole targeting (Cvt) pathway, a prototype of selective autophagy, together with a multi-scale analysis approach to study the molecular structure of Cvt vesicles ...

    Selective autophagy is the mechanism by which large cargos are specifically sequestered for degradation. The structural details of cargo and receptor assembly giving rise to autophagic vesicles remain to be elucidated. We utilize the yeast cytoplasm-to-vacuole targeting (Cvt) pathway, a prototype of selective autophagy, together with a multi-scale analysis approach to study the molecular structure of Cvt vesicles. We report the oligomeric nature of the major Cvt cargo Ape1 with a combined 2.8 Å X-ray and negative stain EM structure, as well as the secondary cargo Ams1 with a 6.3 Å cryo-EM structure. We show that the major dodecameric cargo prApe1 exhibits a tendency to form higher-order chain structures that are broken upon interaction with the receptor Atg19 in vitro The stoichiometry of these cargo-receptor complexes is key to maintaining the size of the Cvt aggregate in vivo Using correlative light and electron microscopy, we further visualize key stages of Cvt vesicle biogenesis. Our findings suggest that Atg19 interaction limits Ape1 aggregate size while serving as a vehicle for vacuolar delivery of tetrameric Ams1.


    Organizational Affiliation

    Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany carsten.sachse@embl.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Aminopeptidase-like proteinA, D [auth B], E [auth C], F [auth D], B [auth E], C [auth F]519Chaetomium thermophilumMutation(s): 0 
Gene Names: CTHT_0065300
UniProt
Find proteins for G0SG74 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SG74 
Go to UniProtKB:  G0SG74
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.019α = 90
b = 143.894β = 90
c = 201.315γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-06-15
    Type: Initial release
  • Version 1.1: 2016-06-22
    Changes: Database references
  • Version 1.2: 2016-07-13
    Changes: Database references
  • Version 1.3: 2019-10-16
    Changes: Data collection