4GMV

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.242 

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:  
    4GMV, 4GN1

  • 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 that like its paralog RIAM, Lpd may also mediate particular Ras GTPase signaling ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras-associated and pleckstrin homology domains-containing protein 1A, B281Homo sapiensMutation(s): 0 
Gene Names: RAPH1ALS2CR18ALS2CR9KIAA1681LPDPREL2RMO1
Find proteins for Q70E73 (Homo sapiens)
Explore Q70E73 
Go to UniProtKB:  Q70E73
NIH Common Fund Data Resources
PHAROS:  Q70E73
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.242 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.617α = 90
b = 96.972β = 126.99
c = 76.824γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
ARP/wARPmodel building
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



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  (Full details and data files)

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