Human transforming growth factor beta2 in a tetragonal crystal form

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 

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Recombinant production, purification, crystallization, and structure analysis of human transforming growth factor beta 2 in a new conformation.

Del Amo-Maestro, L.Marino-Puertas, L.Goulas, T.Gomis-Ruth, F.X.

(2019) Sci Rep 9: 8660-8660

  • DOI: https://doi.org/10.1038/s41598-019-44943-4
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Transforming growth factor β is a disulfide-linked dimeric cytokine that occurs in three highly related isoforms (TGFβ1-TGFβ3) engaged in signaling functions through binding of cognate TGFβ receptors. To regulate this pathway, the cytokines are biosynthesized as inactive pro-TGFβs with an N-terminal latency-associated protein preceding the mature moieties. Due to their pleiotropic implications in physiology and pathology, TGFβs are privileged objects of in vitro studies. However, such studies have long been limited by the lack of efficient human recombinant expression systems of native, glycosylated, and homogenous proteins. Here, we developed pro-TGFβ2 production systems based on human Expi293F cells, which yielded >2 mg of pure histidine- or Strep-tagged protein per liter of cell culture. We assayed this material biophysically and in crystallization assays and obtained a different crystal form of mature TGFβ2, which adopted a conformation deviating from previous structures, with a distinct dimeric conformation that would require significant rearrangement for binding of TGFβ receptors. This new conformation may be reversibly adopted by a certain fraction of the mature TGβ2 population and represent a hitherto undescribed additional level of activity regulation of the mature growth factor once the latency-associated protein has been separated.

  • Organizational Affiliation

    Proteolysis Lab; Structural Biology Unit; "María-de-Maeztu" Unit of Excellence, Molecular Biology Institute of Barcelona (CSIC); Barcelona Science Park, c/Baldiri Reixac, 15-21, 08028, Barcelona, Catalonia, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transforming growth factor beta-2 proprotein112Homo sapiensMutation(s): 0 
Gene Names: TGFB2
UniProt & NIH Common Fund Data Resources
Find proteins for P61812 (Homo sapiens)
Explore P61812 
Go to UniProtKB:  P61812
PHAROS:  P61812
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61812
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.57α = 90
b = 55.57β = 90
c = 70.57γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-03
    Type: Initial release