Straightforward and Cost-Effective Production of RADA-16I Peptide in Escherichia coli

Document Type : Research Paper

Authors

1 PhD Candidate, Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran

2 Associate Professor, Department of Nanobiotechnology, Tarbiat Modares University, Tehran, Iran

3 Professor, Faculty of Biological Sciences, Tarbiat Modares University Tehran, Iran

10.21859/ijb.2125

Abstract

Background: RADA16I represents one of promising hydrogel forming peptides. Several implementations of RADA16I hydrogels have proven successful in the field of regenerative medicine and tissue engineering. However, RADA16I peptides used in various studies utilize synthetic peptides and so far, only two research articles have been published on RADA16I peptide recombinant production. Moreover, previous studies utilized non- or less routine expression and purification methods to produce RADA16I peptide recombinantly.
Objectives: The main goal was to produce the self-assembling peptide, RADA16I, in Escherichia coli by exploiting routine and widely used vectors and purification methods, in shake flask.
Material and Methods: RADA16I coding sequence was inserted in pET31b+, and the construct was transformed into E. coli. Purified fusion constructs were purified using Nickel Sepharose. RADA16I unimers were released using CNBr cleavage. CD and FTIR spectroscopy were used to study recombinant RADA16I’s confirmation. TEM was used to confirm fibril formation of recombinant RADA16I. Furthermore, MTT assay was implemented to assess cytocompatibility of recombinant RADA16I.
Results: The biochemical, biophysical and structural analysis proved the ability of the recombinant RADA16I to form self-assembling peptide nanofibers. Furthermore, the nanofibers exhibited no cytotoxicity and retained their cell adhesive activity.
Conclusions: We successfully produced RADA16I in acceptable levels and established a basis for future investigation for the production of RADA16I under fermentation conditions.

Keywords

Main Subjects

References

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Iranian Journal of Biotechnology
Volume 17, Issue 2
June 2019
Pages 1-7

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