5VWK

Crystal structure of human Scribble PDZ1:Beta-PIX complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for the differential interaction of Scribble PDZ domains with the guanine nucleotide exchange factor beta-PIX.

Lim, K.Y.B.Godde, N.J.Humbert, P.O.Kvansakul, M.

(2017) J. Biol. Chem. 292: 20425-20436

  • DOI: 10.1074/jbc.M117.799452
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Scribble is a highly conserved protein regulator of cell polarity that has been demonstrated to function as a tumor suppressor or, conversely, as an oncogene in a context-dependent manner, and it also controls many physiological processes ranging fro ...

    Scribble is a highly conserved protein regulator of cell polarity that has been demonstrated to function as a tumor suppressor or, conversely, as an oncogene in a context-dependent manner, and it also controls many physiological processes ranging from immunity to memory. Scribble consists of a leucine-rich repeat domain and four PDZ domains, with the latter being responsible for most of Scribble's complex formation with other proteins. Given the similarities of the Scribble PDZ domain sequences in their binding grooves, it is common for these domains to show overlapping preferences for the same ligand. Yet, Scribble PDZ domains can still exhibit unique binding profiles toward other ligands. This raises the fundamental question as to how these PDZ domains discriminate ligands and exert specificities in Scribble complex formation. To better understand how Scribble PDZ domains direct cell polarity signaling, we investigated here their interactions with the well-characterized Scribble binding partner β-PIX, a guanine nucleotide exchange factor. We report the interaction profiles of all isolated Scribble PDZ domains with a β-PIX peptide. We show that Scribble PDZ1 and PDZ3 are the major interactors with β-PIX and reveal a distinct binding hierarchy in the interactions between the individual Scribble PDZ domains and β-PIX. Furthermore, using crystal structures of PDZ1 and PDZ3 bound to β-PIX, we define the structural basis for Scribble's ability to specifically engage β-PIX via its PDZ domains and provide a mechanistic platform for understanding Scribble-β-PIX-coordinated cellular functions such as directional cell migration.


    Organizational Affiliation

    From the Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein scribble homolog
A, B, C, D
122Homo sapiensMutation(s): 0 
Gene Names: SCRIB (CRIB1, KIAA0147, LAP4, SCRB1, VARTUL)
Find proteins for Q14160 (Homo sapiens)
Go to Gene View: SCRIB
Go to UniProtKB:  Q14160
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-PIX
E, F, G, H
8N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, G, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.223 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 74.760α = 90.00
b = 74.760β = 90.00
c = 222.963γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council Australia GrantAustraliaAPP1007918
Australian Research CouncilAustraliaFT130101349

Revision History 

  • Version 1.0: 2017-11-08
    Type: Initial release
  • Version 1.1: 2017-12-27
    Type: Database references