3OK8

I-BAR OF PinkBAR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Pinkbar is an epithelial-specific BAR domain protein that generates planar membrane structures.

Pykalainen, A.Boczkowska, M.Zhao, H.Saarikangas, J.Rebowski, G.Jansen, M.Hakanen, J.Koskela, E.V.Peranen, J.Vihinen, H.Jokitalo, E.Salminen, M.Ikonen, E.Dominguez, R.Lappalainen, P.

(2011) Nat.Struct.Mol.Biol. 18: 902-907

  • DOI: 10.1038/nsmb.2079

  • PubMed Abstract: 
  • Bin/amphipysin/Rvs (BAR)-domain proteins sculpt cellular membranes and have key roles in processes such as endocytosis, cell motility and morphogenesis. BAR domains are divided into three subfamilies: BAR- and F-BAR-domain proteins generate positive ...

    Bin/amphipysin/Rvs (BAR)-domain proteins sculpt cellular membranes and have key roles in processes such as endocytosis, cell motility and morphogenesis. BAR domains are divided into three subfamilies: BAR- and F-BAR-domain proteins generate positive membrane curvature and stabilize cellular invaginations, whereas I-BAR-domain proteins induce negative curvature and stabilize protrusions. We show that a previously uncharacterized member of the I-BAR subfamily, Pinkbar, is specifically expressed in intestinal epithelial cells, where it localizes to Rab13-positive vesicles and to the plasma membrane at intercellular junctions. Notably, the BAR domain of Pinkbar does not induce membrane tubulation but promotes the formation of planar membrane sheets. Structural and mutagenesis analyses reveal that the BAR domain of Pinkbar has a relatively flat lipid-binding interface and that it assembles into sheet-like oligomers in crystals and in solution, which may explain its unique membrane-deforming activity.


    Organizational Affiliation

    Institute of Biotechnology, University of Helsinki, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Brain-specific angiogenesis inhibitor 1-associated protein 2-like protein 2
A, B
222Mus musculusGene Names: Baiap2l2
Find proteins for Q80Y61 (Mus musculus)
Go to UniProtKB:  Q80Y61
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 99.920α = 90.00
b = 39.913β = 94.82
c = 120.702γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
CCP4phasing
HKL-2000data reduction
CCP4model building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-13
    Type: Initial release
  • Version 1.1: 2011-07-20
    Type: Database references
  • Version 1.2: 2011-08-17
    Type: Database references