Abstract:
:Periplasmic expression of recombinant proteins ensures the production of biologically active proteins in a correctly folded state with several key advantages. This research focused on the in-frame cloning of rhIL-15 in pET-20 (+) vector with pelB-leader sequence to direct the protein to the bacterial periplasm. The target construct periplasmic expression was evaluated in four strains, BL21 (DE3), BL21 (DE3) pLysS, Rosetta 2 (DE3) and Rosetta-gami 2 (DE3). Soluble periplasmic expression of IL-15 was highest in Rosetta-gami 2 (DE3) followed by Rossetta 2 (DE3) whereas negligible expression was observed with rest of two expression host. Best expression clone was selected for purification by dye ligand affinity chromatography. Purified rhIL-15 was characterized by SDS-PAGE, Western blotting and SEC-HPLC. This is the first report of functional recombinant human interleukin-15 being expressed and purified with yield of 120 mg/L in the periplasmic space of E. coli.
journal_name
Protein Expr Purifjournal_title
Protein expression and purificationauthors
Ahmed N,Afroze B,Abbas R,Khan MA,Akram M,Tahir S,Bakht S,Munir A,Shahid AAdoi
10.1016/j.pep.2020.105746subject
Has Abstractpub_date
2021-01-01 00:00:00pages
105746eissn
1046-5928issn
1096-0279pii
S1046-5928(20)30337-5journal_volume
177pub_type
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