The harnessing of peptide-monolith constructs for single step plasmid DNA purification

Han, Ying, You, Guanlin, Pattenden, Leonard K., & Forde, Gareth M. (2010) The harnessing of peptide-monolith constructs for single step plasmid DNA purification. Process Biochemistry, 45(2), pp. 203-209.

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The availability of synthetic peptides has paved the way for their use in tailor-made interactions with biomolecules. In this study, a 16mer LacI-based peptide was used as an affinity ligand to examine the scale up feasibility for plasmid DNA purification. First, the peptide was designed and characterized for the affinity purification of lacO containing plasmid DNA, to be employed as a high affinity ligand for the potential capturing of plasmid DNA in a single unit operation. It was found there were no discernible interactions with a control plasmid that did not encode the lacO nucleotide sequence. The dissociation equilibrium constant of the binding between the 16mer peptide and target pUC19 was 5.0 ± 0.5 × 10-8 M as assessed by surface plasmon resonance. This selectivity and moderated affinity indicate that the 16mer is suitable for the adsorption and chromatographic purification of plasmid DNA. The suitability of this peptide was then evaluated using a chromatography system with the 16mer peptide immobilized to a customized monolith to purify plasmid DNA, obtaining preferential purification of supercoiled pUC19. The results demonstrate the applicability of peptide-monolith supports to scale up the purification process for plasmid DNA using designed ligands via a biomimetic approach.

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ID Code: 81536
Item Type: Journal Article
Refereed: Yes
Keywords: Affinity ligands, Chromatography, DNA purification, Monolith, Plasmid DNA, Process scale up, Protein-DNA binding, Process scale-up, Adsorption, Amines, Biomimetics, Chromatographic analysis, Equilibrium constants, Genes, Ligands, Monolithic integrated circuits, Nucleic acids, Peptides, Purification, Surface plasmon resonance, DNA
DOI: 10.1016/j.procbio.2009.09.008
ISSN: 1359-5113
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2009 Elsevier Ltd.
Deposited On: 05 Feb 2015 23:55
Last Modified: 11 Feb 2015 02:32

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