4EDN

Crystal structure of beta-parvin CH2 domain in complex with paxillin LD1 motif


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for paxillin binding and focal adhesion targeting of beta-parvin.

Stiegler, A.L.Draheim, K.M.Li, X.Chayen, N.E.Calderwood, D.A.Boggon, T.J.

(2012) J.Biol.Chem. 287: 32566-32577

  • DOI: 10.1074/jbc.M112.367342
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • β-Parvin is a cytoplasmic adaptor protein that localizes to focal adhesions where it interacts with integrin-linked kinase and is involved in linking integrin receptors to the cytoskeleton. It has been reported that despite high sequence similarity t ...

    β-Parvin is a cytoplasmic adaptor protein that localizes to focal adhesions where it interacts with integrin-linked kinase and is involved in linking integrin receptors to the cytoskeleton. It has been reported that despite high sequence similarity to α-parvin, β-parvin does not bind paxillin, suggesting distinct interactions and cellular functions for these two closely related parvins. Here, we reveal that β-parvin binds directly and specifically to leucine-aspartic acid repeat (LD) motifs in paxillin via its C-terminal calponin homology (CH2) domain. We present the co-crystal structure of β-parvin CH2 domain in complex with paxillin LD1 motif to 2.9 Å resolution and find that the interaction is similar to that previously observed between α-parvin and paxillin LD1. We also present crystal structures of unbound β-parvin CH2 domain at 2.1 Å and 2.0 Å resolution that show significant conformational flexibility in the N-terminal α-helix, suggesting an induced fit upon paxillin binding. We find that β-parvin has specificity for the LD1, LD2, and LD4 motifs of paxillin, with K(D) values determined to 27, 42, and 73 μM, respectively, by surface plasmon resonance. Furthermore, we show that proper localization of β-parvin to focal adhesions requires both the paxillin and integrin-linked kinase binding sites and that paxillin is important for early targeting of β-parvin. These studies provide the first molecular details of β-parvin binding to paxillin and help define the requirements for β-parvin localization to focal adhesions.


    Organizational Affiliation

    Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-parvin
A, B, C, D, E, F, G, H, I, J
133Homo sapiensMutation(s): 0 
Gene Names: PARVB
Find proteins for Q9HBI1 (Homo sapiens)
Go to Gene View: PARVB
Go to UniProtKB:  Q9HBI1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Paxillin
K, L, M, N, O, P, Q
22Homo sapiensMutation(s): 0 
Gene Names: PXN
Find proteins for P49023 (Homo sapiens)
Go to Gene View: PXN
Go to UniProtKB:  P49023
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
K, L, M, N, O, P, Q
NON-POLYMERH2 N

--

ACE
Query on ACE
K, L, M, N, O, P, Q
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.228 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 330.741α = 90.00
b = 55.842β = 97.44
c = 95.550γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
CBASSdata collection
HKL-2000data scaling
HKL-2000data reduction
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-08
    Type: Initial release
  • Version 1.1: 2012-09-26
    Type: Database references
  • Version 1.2: 2013-06-19
    Type: Database references