3NVQ

Molecular mechanism of guidance cue recognition


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Semaphorin-Plexin Recognition and Viral Mimicry from Sema7A and A39R Complexes with PlexinC1.

Liu, H.Juo, Z.S.Shim, A.H.Focia, P.J.Chen, X.Garcia, K.C.He, X.

(2010) Cell 142: 749-761

  • DOI: 10.1016/j.cell.2010.07.040
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Repulsive signaling by Semaphorins and Plexins is crucial for the development and homeostasis of the nervous, immune, and cardiovascular systems. Sema7A acts as both an immune and a neural Semaphorin through PlexinC1, and A39R is a Sema7A mimic secre ...

    Repulsive signaling by Semaphorins and Plexins is crucial for the development and homeostasis of the nervous, immune, and cardiovascular systems. Sema7A acts as both an immune and a neural Semaphorin through PlexinC1, and A39R is a Sema7A mimic secreted by smallpox virus. We report the structures of Sema7A and A39R complexed with the Semaphorin-binding module of PlexinC1. Both structures show two PlexinC1 molecules symmetrically bridged by Semaphorin dimers, in which the Semaphorin and PlexinC1 beta propellers interact in an edge-on, orthogonal orientation. Both binding interfaces are dominated by the insertion of the Semaphorin's 4c-4d loop into a deep groove in blade 3 of the PlexinC1 propeller. A39R appears to achieve Sema7A mimicry by preserving key Plexin-binding determinants seen in the mammalian Sema7A complex that have evolved to achieve higher affinity binding to the host-derived PlexinC1. The complex structures support a conserved Semaphorin-Plexin recognition mode and suggest that Plexins are activated by dimerization.


    Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Semaphorin-7A
A, E
590Homo sapiensMutation(s): 0 
Gene Names: SEMA7A (CD108, SEMAL)
Find proteins for O75326 (Homo sapiens)
Go to Gene View: SEMA7A
Go to UniProtKB:  O75326
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Plexin-C1
B, F
476Homo sapiensMutation(s): 0 
Gene Names: PLXNC1 (VESPR)
Find proteins for O60486 (Homo sapiens)
Go to Gene View: PLXNC1
Go to UniProtKB:  O60486
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDG
Query on NDG

Download SDF File 
Download CCD File 
A
2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE
C8 H15 N O6
OVRNDRQMDRJTHS-PVFLNQBWSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, E, F
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.248 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 99.645α = 90.00
b = 126.078β = 90.00
c = 236.419γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
RESOLVEmodel building
RESOLVEphasing
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance