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  3. Vol. 2 No. 1 (2006): IJPS_Volume 2_Issue 1(2006)
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Vol. 2 No. 1 (2006)

January 2006

Bioengineered Peptides Based on α1-PDX Structure as Inhibitors of Furin: Design, Synthesis and Comparative Efficacy Bioengineered peptides as inhibitors of furin

  • Farzaneh Lotfipour
  • Mohammad Hossein Zarrintan
  • Jabraeil Sherbafi
  • Ajoy Basak

Iranian Journal of Pharmaceutical Sciences, Vol. 2 No. 1 (2006), 15 January 2006 , Page 11-22
https://doi.org/10.22037/ijps.v2.39576

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Abstract

Furin is a Ca2+ -dependent serine protease which cleaves proprotein substrates at the Arg-Xaa-(Lys/Arg)-Arg site to generate biologically active proteins. Furin’s
critical role in many cellular events associated with health disorders such as HIV, SARS, anthrax, and influenza as well as cancer has made inhibitors of this enzyme as therapeutic targets. To this date, the most potent inhibitor of furin is the bioengineered serpin (serine protease inhibitors) protein namely α1-PDX. It was already demonstrated that the reactive site loop (RSL) of all serpins are prime interactive domains responsible for their protease inhibitory function. Therefore, the objective of the present study was to develop small peptides with the RSL structure of serpin α1-PDX, as inhibitors of furin activity. Fifteen peptides were designed from reactive site loop structure of α1-PDX (sequences 367-394) with different mutations in this site, and were synthesized using a solid-phase peptide synthesizer, and characterized by MALDI-tof mass spectrometry and amino acid analysis. The inhibitory effects of the designed peptides against furin activity were evaluated by spectroflourometry using QVEGF-C [Abz-QVHSIIRRßSLP-Y(NO2)-A-CONH2, Abz = 2-amino benzoic acid and Y(NO2) = 3-nitro tyrosine] as substrate. The results showed that all of the designed peptides inhibit furin activity with different efficacies in a time and concentration dependent pattern. Peptides containing His or straight alkyl side chain amino acids in positions P2, P3, P6 and P8 have higher efficacy for blocking furin activity in comparison with peptides containing Arg or Lys in that position. The study further revealed that the peptides inactivate furin in a slow tight binding pattern. Our study provides an alternate strategy for development of efficient peptide-based inhibitors of proprotein convertases such as furin.

Keywords:
  • α1-PDX; Furin
  • Proprotein convertase
  • Protease inhibitor
  • Serpin
  • IJPS_Volume 2_Issue 1_Pages 11-22

How to Cite

Lotfipour, F., Zarrintan, M. H. ., Sherbafi, J. ., & Basak, A. . (2006). Bioengineered Peptides Based on α1-PDX Structure as Inhibitors of Furin: Design, Synthesis and Comparative Efficacy: Bioengineered peptides as inhibitors of furin. Iranian Journal of Pharmaceutical Sciences, 2(1), 11–22. https://doi.org/10.22037/ijps.v2.39576
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References

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