6N8P

Crystal structure of the human cell polarity protein Lethal Giant Larvae 2 (Lgl2). Unphosphorylated, crystal form 1.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.193 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insights into the aPKC regulatory switch mechanism of the human cell polarity protein lethal giant larvae 2.

Almagor, L.Ufimtsev, I.S.Ayer, A.Li, J.Weis, W.I.

(2019) Proc.Natl.Acad.Sci.USA 116: 10804-10812

  • DOI: 10.1073/pnas.1821514116
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Metazoan cell polarity is controlled by a set of highly conserved proteins. Lethal giant larvae (Lgl) functions in apical-basal polarity through phosphorylation-dependent interactions with several other proteins as well as the plasma membrane. Phosph ...

    Metazoan cell polarity is controlled by a set of highly conserved proteins. Lethal giant larvae (Lgl) functions in apical-basal polarity through phosphorylation-dependent interactions with several other proteins as well as the plasma membrane. Phosphorylation of Lgl by atypical protein kinase C (aPKC), a component of the partitioning-defective (Par) complex in epithelial cells, excludes Lgl from the apical membrane, a crucial step in the establishment of epithelial cell polarity. We present the crystal structures of human Lgl2 in both its unphosphorylated and aPKC-phosphorylated states. Lgl2 adopts a double β-propeller structure that is unchanged by aPKC phosphorylation of an unstructured loop in its second β-propeller, ruling out models of phosphorylation-dependent conformational change. We demonstrate that phosphorylation controls the direct binding of purified Lgl2 to negative phospholipids in vitro. We also show that a coil-helix transition of this region that is promoted by phosphatidylinositol 4,5-bisphosphate (PIP 2 ) is also phosphorylation-dependent, implying a highly effective phosphorylative switch for membrane association.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305.,Department of Molecular & Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305.,Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305; bill.weis@stanford.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lethal(2) giant larvae protein homolog 2
A
979Homo sapiensMutation(s): 0 
Gene Names: LLGL2
Find proteins for Q6P1M3 (Homo sapiens)
Go to Gene View: LLGL2
Go to UniProtKB:  Q6P1M3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.193 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.204 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.699α = 90.00
b = 118.489β = 90.00
c = 126.639γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Mental HealthUnited StatesMH58570

Revision History 

  • Version 1.0: 2019-05-08
    Type: Initial release
  • Version 1.1: 2019-05-29
    Type: Data collection, Database references
  • Version 1.2: 2019-06-12
    Type: Data collection, Database references