4GMV

Crystal Structure of the coiled-coil, RA and PH domains of Lamellipodin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.403 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of Lamellipodin implicates diverse functions in actin polymerization and Ras signaling.

Chang, Y.C.Zhang, H.Brennan, M.L.Wu, J.

(2013) Protein Cell 4: 211-219

  • DOI: 10.1007/s13238-013-2082-5
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The adapter protein Lamellipodin (Lpd) plays an important role in cell migration. In particular, Lpd mediates lamellipodia formation by regulating actin dynamics via interacting with Ena/VASP proteins. Its RA-PH tandem domain configuration suggests t ...

    The adapter protein Lamellipodin (Lpd) plays an important role in cell migration. In particular, Lpd mediates lamellipodia formation by regulating actin dynamics via interacting with Ena/VASP proteins. Its RA-PH tandem domain configuration suggests that like its paralog RIAM, Lpd may also mediate particular Ras GTPase signaling. We determined the crystal structures of the Lpd RA-PH domains alone and with an N-terminal coiled-coil region (cc-RA-PH). These structures reveal that apart from the anticipated coiled-coil interaction, Lpd may also oligomerize through a second intermolecular contact site. We then validated both oligomerization interfaces in solution by mutagenesis. A fluorescence-polarization study demonstrated that Lpd binds phosphoinositol with low affinity. Based on our crystallographic and biochemical data, we propose that Lpd and RIAM serve diverse functions: Lpd plays a predominant role in regulating actin polymerization, and its function in mediating Ras GTPase signaling is largely suppressed compared to RIAM.


    Organizational Affiliation

    Department of Developmental Therapeutics, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ras-associated and pleckstrin homology domains-containing protein 1
A, B
281Homo sapiensMutation(s): 0 
Gene Names: RAPH1 (ALS2CR18, ALS2CR9, KIAA1681, LPD, PREL2, RMO1)
Find proteins for Q70E73 (Homo sapiens)
Go to Gene View: RAPH1
Go to UniProtKB:  Q70E73
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.403 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.240 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 117.617α = 90.00
b = 96.972β = 126.99
c = 76.824γ = 90.00
Software Package:
Software NamePurpose
MAR345dtbdata collection
REFMACrefinement
HKL-2000data reduction
ARP/wARPmodel building
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-08-16 
  • Released Date: 2012-11-28 
  • Deposition Author(s): Chang, Y.C.E., Wu, J.

Revision History 

  • Version 1.0: 2012-11-28
    Type: Initial release
  • Version 1.1: 2013-03-27
    Type: Database references