4XH2

Crystal structure of human paxillin LD4 motif in complex with Fab fragment

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Engineering Synthetic Antibody Inhibitors Specific for LD2 or LD4 Motifs of Paxillin.

Nocula-Lugowska, M., Lugowski, M., Salgia, R., Kossiakoff, A.A.

(2015) J.Mol.Biol. 427: 2532-2547

  • DOI: 10.1016/j.jmb.2015.06.004
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Focal adhesion protein paxillin links integrin and growth factor signaling to actin cytoskeleton. Most of paxillin signaling activity is regulated via leucine-rich LD motifs (LD1-LD5) located at the N-terminus. Here, we demonstrate a method to engine ...

    Focal adhesion protein paxillin links integrin and growth factor signaling to actin cytoskeleton. Most of paxillin signaling activity is regulated via leucine-rich LD motifs (LD1-LD5) located at the N-terminus. Here, we demonstrate a method to engineer highly selective synthetic antibodies (sABs) against LD2 and LD4 that are binding sites for focal adhesion kinase (FAK) and other proteins. Phage display selections against peptides were used to generate sABs recognizing each LD motif. In the obtained X-ray crystal structures of the LD-sAB complexes, the LD motifs are helical and bind sABs through a hydrophobic side, similarly as in the structures with natural paxillin partners. The sABs are capable of pulling down endogenous paxillin in complex with FAK and can visualize paxillin in focal adhesions in cells. They were also used as selective inhibitors to effectively compete with focal adhesion targeting domain of FAK for the binding to LD2 and LD4. The sABs are tools for investigation of paxillin LD binding "platforms" and are capable of inhibiting paxillin interactions, thereby useful as potential therapeutics in the future.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60607, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fab Heavy Chain
A, C, E, G, H, J
228N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab Light Chain
B, D, F, I, K, L
217N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
paxillin LD4
a, c, e, g, h, j
18Homo sapiensGene Names: PXN
Find proteins for P49023 (Homo sapiens)
Go to Gene View: PXN
Go to UniProtKB:  P49023
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4
Download SDF File 
Download CCD File 
D, F
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ACT
Query on ACT
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Download CCD File 
F
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL
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Download CCD File 
B, C, D, F, G, H, I, K, L
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
LDA
Query on LDA
Download SDF File 
Download CCD File 
F
LAURYL DIMETHYLAMINE-N-OXIDE
C14 H31 N O
SYELZBGXAIXKHU-UHFFFAOYSA-N
 Ligand Interaction
ACE
Query on ACE
Download SDF File 
Download CCD File 
J, L
ACETYL GROUP
C2 H4 O
IKHGUXGNUITLKF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.224 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 117.580α = 90.00
b = 138.120β = 90.00
c = 223.510γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
PDB_EXTRACTdata extraction
PHASERphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationCountryGrant Number
National Institutes of HealthUnited States--

Revision History 

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-08-05
    Type: Database references
  • Version 1.2: 2017-05-31
    Type: Other