5TX2

Miniature TGF-beta2 3-mutant monomer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.213 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

An engineered transforming growth factor beta (TGF-beta ) monomer that functions as a dominant negative to block TGF-beta signaling.

Kim, S.K.Barron, L.Hinck, C.S.Petrunak, E.M.Cano, K.E.Thangirala, A.Iskra, B.Brothers, M.Vonberg, M.Leal, B.Richter, B.Kodali, R.Taylor, A.B.Du, S.Barnes, C.O.Sulea, T.Calero, G.Hart, P.J.Hart, M.J.Demeler, B.Hinck, A.P.

(2017) J Biol Chem 292: 7173-7188

  • DOI: https://doi.org/10.1074/jbc.M116.768754
  • Primary Citation of Related Structures:  
    5TX2, 5TX4, 5TX6

  • PubMed Abstract: 

    The transforming growth factor β isoforms, TGF-β1, -β2, and -β3, are small secreted homodimeric signaling proteins with essential roles in regulating the adaptive immune system and maintaining the extracellular matrix. However, dysregulation of the TGF-β pathway is responsible for promoting the progression of several human diseases, including cancer and fibrosis. Despite the known importance of TGF-βs in promoting disease progression, no inhibitors have been approved for use in humans. Herein, we describe an engineered TGF-β monomer, lacking the heel helix, a structural motif essential for binding the TGF-β type I receptor (TβRI) but dispensable for binding the other receptor required for TGF-β signaling, the TGF-β type II receptor (TβRII), as an alternative therapeutic modality for blocking TGF-β signaling in humans. As shown through binding studies and crystallography, the engineered monomer retained the same overall structure of native TGF-β monomers and bound TβRII in an identical manner. Cell-based luciferase assays showed that the engineered monomer functioned as a dominant negative to inhibit TGF-β signaling with a K i of 20-70 nm Investigation of the mechanism showed that the high affinity of the engineered monomer for TβRII, coupled with its reduced ability to non-covalently dimerize and its inability to bind and recruit TβRI, enabled it to bind endogenous TβRII but prevented it from binding and recruiting TβRI to form a signaling complex. Such engineered monomers provide a new avenue to probe and manipulate TGF-β signaling and may inform similar modifications of other TGF-β family members.


  • Organizational Affiliation

    the Departments of Biochemistry and Structural Biology and.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transforming growth factor beta-2
A, B
93Mus musculusMutation(s): 3 
Gene Names: Tgfb2
UniProt
Find proteins for P27090 (Mus musculus)
Explore P27090 
Go to UniProtKB:  P27090
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP27090
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.213 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.459α = 90
b = 33.355β = 109.55
c = 54.131γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-01
    Type: Initial release
  • Version 1.1: 2017-03-08
    Changes: Database references
  • Version 1.2: 2017-05-10
    Changes: Database references
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Refinement description