5D94

Crystal structure of LC3-LIR peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

FYCO1 Contains a C-terminally Extended, LC3A/B-preferring LC3-interacting Region (LIR) Motif Required for Efficient Maturation of Autophagosomes during Basal Autophagy

Olsvik, H.L.Lamark, T.Takagi, K.Larsen, K.B.Evjen, G.vervatn, A.Mizushima, T.Johansen, T.

(2015) J Biol Chem 290: 29361-29374

  • DOI: 10.1074/jbc.M115.686915
  • Primary Citation of Related Structures:  
    5D94

  • PubMed Abstract: 
  • FYCO1 (FYVE and coiled-coil protein 1) is a transport adaptor that binds to phosphatidylinositol 3-phosphate, to Rab7, and to LC3 (microtubule-associated protein 1 light chain 3) to mediate transport of late endosomes and autophagosomes along microtubules in the plus end direction ...

    FYCO1 (FYVE and coiled-coil protein 1) is a transport adaptor that binds to phosphatidylinositol 3-phosphate, to Rab7, and to LC3 (microtubule-associated protein 1 light chain 3) to mediate transport of late endosomes and autophagosomes along microtubules in the plus end direction. We have previously shown that FYCO1 binds to LC3B via a 19-amino acid sequence containing a putative core LC3-interacting region (LIR) motif. Here, we show that FYCO1 preferentially binds to LC3A and -B. By peptide array-based two-dimensional mutational scans of the binding to LC3B, we found FYCO1 to contain a C-terminally extended LIR domain. We determined the crystal structure of a complex between a 13-amino acid LIR peptide from FYCO1 and LC3B at 1.53 Å resolution. By combining the structural information with mutational analyses, both the basis for the C-terminally extended LIR and the specificity for LC3A/B binding were revealed. FYCO1 contains a 9-amino acid-long F-type LIR motif. In addition to the canonical aromatic residue at position 1 and the hydrophobic residue at position 3, an acidic residue and a hydrophobic residue at positions 8 and 9, respectively, are important for efficient binding to LC3B explaining the C-terminal extension. The specificity for binding to LC3A/B is due to the interaction between Asp(1285) in FYCO1 and His(57) in LC3B. To address the functional significance of the LIR motif of FYCO1, we generated FYCO1 knock-out cells that subsequently were reconstituted with GFP-FYCO1 WT and LIR mutant constructs. Our data show that FYCO1 requires a functional LIR motif to facilitate efficient maturation of autophagosomes under basal conditions, whereas starvation-induced autophagy was unaffected.


    Organizational Affiliation

    From the Molecular Cancer Research Group, Institute of Medical Biology, University of Tromsø - The Arctic University of Norway, 9037 Tromsø, Norway and terje.johansen@uit.no.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Microtubule-associated proteins 1A/1B light chain 3B A130Homo sapiensMutation(s): 0 
Gene Names: MAP1LC3BMAP1ALC3
Find proteins for Q9GZQ8 (Homo sapiens)
Explore Q9GZQ8 
Go to UniProtKB:  Q9GZQ8
NIH Common Fund Data Resources
PHAROS:  Q9GZQ8
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide from FYVE and coiled-coil domain-containing protein 1 B13Homo sapiensMutation(s): 0 
Gene Names: FYCO1ZFYVE7
Find proteins for Q9BQS8 (Homo sapiens)
Explore Q9BQS8 
Go to UniProtKB:  Q9BQS8
NIH Common Fund Data Resources
PHAROS:  Q9BQS8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.724α = 90
b = 39.162β = 115.05
c = 42.756γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data scaling
MOLREPphasing
PDB_EXTRACTdata extraction
HKL-2000data reduction
Cootmodel building

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-10-28
    Changes: Database references
  • Version 1.2: 2015-12-16
    Changes: Database references
  • Version 1.3: 2020-02-19
    Changes: Data collection, Database references, Derived calculations