2Y6U

Peroxisomal alpha-beta-hydrolase Lpx1 (Yor084w) from Saccharomyces cerevisiae (crystal form II)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Unusual Extended C-Terminal Helix of the Peroxisomal Alpha-Beta-Hydrolase Lpx1 is Involved in Dimer Contacts But Dispensable for Dimerization

Thoms, S.Hofhuis, J.Thoing, C.Gartner, J.Niemann, H.H.

(2011) J Struct Biol 175: 362

  • DOI: 10.1016/j.jsb.2011.06.008
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The yeast peroxisomal hydrolase Lpx1 belongs to the α/β-hydrolase superfamily. In the absence of Lpx1, yeast peroxisomes show an aberrant vacuolated morphology similar to what is found in peroxisomal disorder patients. Here, we present the crystal st ...

    The yeast peroxisomal hydrolase Lpx1 belongs to the α/β-hydrolase superfamily. In the absence of Lpx1, yeast peroxisomes show an aberrant vacuolated morphology similar to what is found in peroxisomal disorder patients. Here, we present the crystal structure of Lpx1 determined at a resolution of 1.9 Å. The structure reveals the complete catalytic triad with an unusual location of the acid residue after strand β6 of the canonical α/β-hydrolase fold. A four-helix cap domain covers the active site. The interface between the α/β-hydrolase core and the cap domain forms the potential substrate binding site, which may also comprise the tunnel that leads into the protein interior and widens into a cavity. Two further tunnels connect the active site to the protein surface, potentially facilitating substrate access. Lpx1 is a homodimer. The α/β-hydrolase core folds of the two protomers form the dimer contact site. Further dimerization contacts arise from the mutual embracement of the cap domain of one protomer by the non-canonical C-terminal helix of the other, resulting in a total buried surface area of some 6000 Ų. The unusual C-terminal helix sticks out from the core fold to which it is connected by an extended flexible loop. We analyzed whether this helix is required for dimerization and for import of the dimer into peroxisomes using biochemical assays in vitro and a microscopy-based interaction assay in mammalian cells. Surprisingly, the C-terminal helix is dispensable for dimerization and dimer import. The unusually robust self-interaction suggests that Lpx1 is imported into peroxisomes as dimer.


    Organizational Affiliation

    Department of Pediatrics and Pediatric Neurology, University Medical Center, University of Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany. sven.thoms@med.uni-goettingen.de



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PEROXISOMAL MEMBRANE PROTEIN LPX1
A
398SACCHAROMYCES CEREVISIAEMutation(s): 0 
EC: 3.1.1
Find proteins for Q12405 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12405
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CME
Query on CME
A
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
CSO
Query on CSO
A
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.156α = 90
b = 87.156β = 90
c = 125.52γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-13
    Type: Initial release
  • Version 1.1: 2011-08-17
    Changes: Database references
  • Version 1.2: 2019-07-24
    Changes: Data collection, Derived calculations
  • Version 1.3: 2019-09-25
    Changes: Data collection, Experimental preparation, Other