Chimeric GST Containing Inserts of Kininogen Peptides

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report

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Chimeric glutathione S-transferases containing inserts of kininogen peptides: potential novel protein therapeutics.

Bentley, A.A.Merkulov, S.M.Peng, Y.Rozmarynowycz, R.Qi, X.Pusztai-Carey, M.Merrick, W.C.Yee, V.C.McCrae, K.R.Komar, A.A.

(2012) J Biol Chem 287: 22142-22150

  • DOI: https://doi.org/10.1074/jbc.M112.372854
  • Primary Citation of Related Structures:  
    4ECB, 4ECC

  • PubMed Abstract: 

    The study of synthetic peptides corresponding to discrete regions of proteins has facilitated the understanding of protein structure-activity relationships. Short peptides can also be used as powerful therapeutic agents. However, in many instances, small peptides are prone to rapid degradation or aggregation and may lack the conformation required to mimic the functional motifs of the protein. For peptides to function as pharmacologically active agents, efficient production or expression, high solubility, and retention of biological activity through purification and storage steps are required. We report here the design, expression, and functional analysis of eight engineered GST proteins (denoted GSHKTs) in which peptides ranging in size from 8 to 16 amino acids and derived from human high molecular weight kininogen (HK) domain 5 were inserted into GST (between Gly-49 and Leu-50). Peptides derived from HK are known to inhibit cell proliferation, angiogenesis, and tumor metastasis, and the biological activity of the HK peptides was dramatically (>50-fold) enhanced following insertion into GST. GSHKTs are soluble and easily purified from Escherichia coli by affinity chromatography. Functionally, these hybrid proteins cause inhibition of endothelial cell proliferation. Crystallographic analysis of GSHKT10 and GSHKT13 (harboring 10- and 13-residue HK peptides, respectively) showed that the overall GST structure was not perturbed. These results suggest that the therapeutic efficacy of short peptides can be enhanced by insertion into larger proteins that are easily expressed and purified and that GST may potentially be used as such a carrier.

  • Organizational Affiliation

    Center for Gene Regulation in Health and Disease, Department of Biological, Geological, and Environmental Sciences, Cleveland State University, Cleveland, Ohio 44115, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
chimeric protein between GSHKT10 and domain 5 of kininogen-1231Schistosoma japonicumHomo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P01042 (Homo sapiens)
Explore P01042 
Go to UniProtKB:  P01042
PHAROS:  P01042
Find proteins for P08515 (Schistosoma japonicum)
Explore P08515 
Go to UniProtKB:  P08515
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP01042P08515
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.52α = 90
b = 92.52β = 90
c = 58.087γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-16
    Type: Initial release
  • Version 1.1: 2012-09-19
    Changes: Database references
  • Version 1.2: 2017-08-09
    Changes: Refinement description, Source and taxonomy
  • Version 1.3: 2023-09-13
    Changes: Data collection, Database references, Refinement description