PMID- 29959013 OWN - NLM STAT- MEDLINE DCOM- 20181121 LR - 20181121 IS - 1879-0003 (Electronic) IS - 0141-8130 (Linking) VI - 118 IP - Pt B DP - 2018 Oct 15 TI - Optimization of in vitro refolding conditions of recombinant Lepidium draba peroxidase using design of experiments. PG - 1369-1376 LID - S0141-8130(18)31832-4 [pii] LID - 10.1016/j.ijbiomac.2018.06.122 [doi] AB - The main objective of this study was to optimize the in vitro refolding conditions of the recombinant Lepidium draba peroxidase (LDP). Initially, the effects of various factors were investigated on LDP refolding yield using one-factor-at-a-time (OFAT) method. Based on the OFAT results, optimum concentrations for LDP refolding were 2 M urea, 2 mM CaCl(2), 0.42 mM l-glutathione oxidized (GSSG), 0.20 mg/ml protein, and 12 muM hemin as well as pH 7. Secondly, according to the OFAT results, design of experiments (DOE) was applied for investigation of the interactions between factors including protein (P), urea (U), CaCl(2) (C), and GSSG (G). The results showed the possible interaction between PC, PG, PU, and GU. Lastly, response surface methodology (RSM) was used for final refolding conditions optimization. The final optimized refolding conditions for LDP were conducted as 2 M urea, 1 mM CaCl(2), 0.70 mM GSSG, 0.07 mM DTT, 0.15 mg/ml protein which they obtained from RSM results and 12 muM hemin, and pH 7 according to the results of OFAT method. Overall, under optimal conditions, 23.4 mg active refolded LDP per liter of expression medium was obtained. So, the refolding yield was calculated to be approximately 48%. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Fattahian, Yaser AU - Fattahian Y AD - Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. FAU - Riahi-Madvar, Ali AU - Riahi-Madvar A AD - Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. Electronic address: Riahi.ali@gmail.com. FAU - Mirzaee, Reza AU - Mirzaee R AD - Jiroft University of Medical Sciences, Jiroft, Iran. FAU - Torkzadeh-Mahani, Masoud AU - Torkzadeh-Mahani M AD - Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. FAU - Asadikaram, Gholamreza AU - Asadikaram G AD - Neuroscience Research Center, Institute of Neuropharmacology, Department of Biochemistry, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran. FAU - Sargazi, Ghasem AU - Sargazi G AD - Department of Nanotechnology Engineering, Mineral Industries Research Center, Shahid Bahonar University of Kerman, Kerman, Iran. LA - eng PT - Journal Article DEP - 20180626 PL - Netherlands TA - Int J Biol Macromol JT - International journal of biological macromolecules JID - 7909578 RN - 0 (Recombinant Proteins) RN - 8W8T17847W (Urea) RN - EC 1.11.1.7 (Peroxidase) RN - M4I0D6VV5M (Calcium Chloride) RN - ULW86O013H (Glutathione Disulfide) SB - IM MH - Calcium Chloride/pharmacology MH - Dose-Response Relationship, Drug MH - Glutathione Disulfide/pharmacology MH - Lepidium/*enzymology MH - Peroxidase/*chemistry MH - Protein Refolding/*drug effects MH - Recombinant Proteins/*chemistry MH - Solubility MH - Urea/pharmacology OTO - NOTNLM OT - Design of experiments OT - Lepidium draba peroxidase OT - Refolding OT - Response surface methodology EDAT- 2018/07/01 06:00 MHDA- 2018/11/22 06:00 CRDT- 2018/07/01 06:00 PHST- 2018/04/18 00:00 [received] PHST- 2018/06/17 00:00 [revised] PHST- 2018/06/25 00:00 [accepted] PHST- 2018/07/01 06:00 [pubmed] PHST- 2018/11/22 06:00 [medline] PHST- 2018/07/01 06:00 [entrez] AID - S0141-8130(18)31832-4 [pii] AID - 10.1016/j.ijbiomac.2018.06.122 [doi] PST - ppublish SO - Int J Biol Macromol. 2018 Oct 15;118(Pt B):1369-1376. doi: 10.1016/j.ijbiomac.2018.06.122. Epub 2018 Jun 26.