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 
  • R-Value Observed: 0.225 

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This is version 1.2 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:  
    5VWI, 5VWK, 5VWC

  • 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, m.kvansakul@latrobe.edu.au.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein scribble homologA, B, C, D122Homo sapiensMutation(s): 0 
Gene Names: SCRIB, CRIB1, KIAA0147, LAP4, SCRB1, VARTUL
Find proteins for Q14160 (Homo sapiens)
Explore Q14160 
Go to UniProtKB:  Q14160
NIH Common Fund Data Resources
PHAROS  Q14160
GTEx  ENSG00000180900
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-PIXE, F, G, H8Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.225 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.76α = 90
b = 74.76β = 90
c = 222.963γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1007918
Australian Research Council (ARC)AustraliaFT130101349

Revision History 

  • Version 1.0: 2017-11-08
    Type: Initial release
  • Version 1.1: 2017-12-27
    Changes: Database references
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence