2PJY

Structural basis for cooperative assembly of the TGF-beta signaling complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cooperative assembly of TGF-beta superfamily signaling complexes is mediated by two disparate mechanisms and distinct modes of receptor binding.

Groppe, J.Hinck, C.S.Samavarchi-Tehrani, P.Zubieta, C.Schuermann, J.P.Taylor, A.B.Schwarz, P.M.Wrana, J.L.Hinck, A.P.

(2008) Mol.Cell 29: 157-168

  • DOI: 10.1016/j.molcel.2007.11.039

  • PubMed Abstract: 
  • Dimeric ligands of the transforming growth factor-beta (TGF-beta) superfamily signal across cell membranes in a distinctive manner by assembling heterotetrameric complexes of structurally related serine/threonine-kinase receptor pairs. Unlike complex ...

    Dimeric ligands of the transforming growth factor-beta (TGF-beta) superfamily signal across cell membranes in a distinctive manner by assembling heterotetrameric complexes of structurally related serine/threonine-kinase receptor pairs. Unlike complexes of the bone morphogenetic protein (BMP) branch that apparently form due to avidity from membrane localization, TGF-beta complexes assemble cooperatively through recruitment of the low-affinity (type I) receptor by the ligand-bound high-affinity (type II) pair. Here we report the crystal structure of TGF-beta3 in complex with the extracellular domains of both pairs of receptors, revealing that the type I docks and becomes tethered via unique extensions at a composite ligand-type II interface. Disrupting the receptor-receptor interactions conferred by these extensions abolishes assembly of the signaling complex and signal transduction (Smad activation). Although structurally similar, BMP and TGF-beta receptors bind in dramatically different modes, mediating graded and switch-like assembly mechanisms that may have coevolved with branch-specific groups of cytoplasmic effectors.


    Organizational Affiliation

    Department of Biochemistry, University of Texas Health Science Center, San Antonio, TX 78229, USA. jgroppe@bcd.tamhsc.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transforming growth factor beta-3
A
112Homo sapiensGene Names: TGFB3
Find proteins for P10600 (Homo sapiens)
Go to Gene View: TGFB3
Go to UniProtKB:  P10600
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TGF-beta receptor type-2
B
108Homo sapiensGene Names: TGFBR2
EC: 2.7.11.30
Find proteins for P37173 (Homo sapiens)
Go to Gene View: TGFBR2
Go to UniProtKB:  P37173
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TGF-beta receptor type-1
C
79Homo sapiensGene Names: TGFBR1 (ALK5, SKR4)
EC: 2.7.11.30
Find proteins for P36897 (Homo sapiens)
Go to Gene View: TGFBR1
Go to UniProtKB:  P36897
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 66.920α = 90.00
b = 66.920β = 90.00
c = 254.360γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
SOLVEphasing
REFMACrefinement
XSCALEdata scaling
MOLREPphasing
PDB_EXTRACTdata extraction
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance