2PJY

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 

wwPDB Validation   3D Report Full Report


This is version 1.2 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
  • Primary Citation of Related Structures:  
    2PJY

  • 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 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 ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transforming growth factor beta-3A112Homo sapiensMutation(s): 0 
Gene Names: TGFB3
UniProt & NIH Common Fund Data Resources
Find proteins for P10600 (Homo sapiens)
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Go to UniProtKB:  P10600
PHAROS:  P10600
Entity Groups  
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UniProt GroupP10600
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TGF-beta receptor type-2B108Homo sapiensMutation(s): 1 
Gene Names: TGFBR2
EC: 2.7.11.30
UniProt & NIH Common Fund Data Resources
Find proteins for P37173 (Homo sapiens)
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PHAROS:  P37173
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UniProt GroupP37173
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
TGF-beta receptor type-1C79Homo sapiensMutation(s): 1 
Gene Names: TGFBR1, ALK5, SKR4
EC: 2.7.11.30
UniProt & NIH Common Fund Data Resources
Find proteins for P36897 (Homo sapiens)
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Go to UniProtKB:  P36897
PHAROS:  P36897
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UniProt GroupP36897
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.92α = 90
b = 66.92β = 90
c = 254.36γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
MOLREPphasing
SOLVEphasing
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references