4ZDV

Crystal structure of LC3 in complex with FAM134B LIR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Regulation of endoplasmic reticulum turnover by selective autophagy.

Khaminets, A.Heinrich, T.Mari, M.Grumati, P.Huebner, A.K.Akutsu, M.Liebmann, L.Stolz, A.Nietzsche, S.Koch, N.Mauthe, M.Katona, I.Qualmann, B.Weis, J.Reggiori, F.Kurth, I.Hubner, C.A.Dikic, I.

(2015) Nature 522: 354-358

  • DOI: 10.1038/nature14498

  • PubMed Abstract: 
  • The endoplasmic reticulum (ER) is the largest intracellular endomembrane system, enabling protein and lipid synthesis, ion homeostasis, quality control of newly synthesized proteins and organelle communication. Constant ER turnover and modulation is ...

    The endoplasmic reticulum (ER) is the largest intracellular endomembrane system, enabling protein and lipid synthesis, ion homeostasis, quality control of newly synthesized proteins and organelle communication. Constant ER turnover and modulation is needed to meet different cellular requirements and autophagy has an important role in this process. However, its underlying regulatory mechanisms remain unexplained. Here we show that members of the FAM134 reticulon protein family are ER-resident receptors that bind to autophagy modifiers LC3 and GABARAP, and facilitate ER degradation by autophagy ('ER-phagy'). Downregulation of FAM134B protein in human cells causes an expansion of the ER, while FAM134B overexpression results in ER fragmentation and lysosomal degradation. Mutant FAM134B proteins that cause sensory neuropathy in humans are unable to act as ER-phagy receptors. Consistently, disruption of Fam134b in mice causes expansion of the ER, inhibits ER turnover, sensitizes cells to stress-induced apoptotic cell death and leads to degeneration of sensory neurons. Therefore, selective ER-phagy via FAM134 proteins is indispensable for mammalian cell homeostasis and controls ER morphology and turnover in mice and humans.


    Organizational Affiliation

    Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Microtubule-associated proteins 1A/1B light chain 3A
A
132Homo sapiensMutation(s): 0 
Gene Names: MAP1LC3A
Find proteins for Q9H492 (Homo sapiens)
Go to Gene View: MAP1LC3A
Go to UniProtKB:  Q9H492
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.184 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 62.170α = 90.00
b = 62.170β = 90.00
c = 74.410γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
PHENIXrefinement
MOLREPphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-06-03
    Type: Initial release
  • Version 1.1: 2015-06-17
    Type: Database references
  • Version 1.2: 2015-06-24
    Type: Database references