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Biotechnological production of the cell penetrating antifungal PAF102 peptide in pichia pastoris
Popa, Crina (Centre de Recerca en Agrigenòmica)
Shi, Xiaoqing (Centre de Recerca en Agrigenòmica)
Ruiz Medina, Tarik (Centre de Recerca en Agrigenòmica)
Ferrer, Pau (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Coca López, María (Centre de Recerca en Agrigenòmica)

Date: 2019
Abstract: Antimicrobial peptides (AMPs) have potent and durable antimicrobial activity to a wide range of fungi and bacteria. The growing problem of drug-resistant pathogenic microorganisms, together with the lack of new effective compounds, has stimulated interest in developing AMPs as anti-infective molecules. PAF102 is an AMP that was rationally designed for improved antifungal properties. This cell penetrating peptide has potent and specific activity against major fungal pathogens. Cecropin A is a natural AMP with strong and fast lytic activity against bacterial and fungal pathogens, including multidrug resistant pathogens. Both peptides, PAF102 and Cecropin A, are alternative antibiotic compounds. However, their exploitation requires fast, cost-efficient production systems. Here, we developed an innovative system to produce AMPs in Pichia pastoris using the oleosin fusion technology. Oleosins are plant-specific proteins with a structural role in lipid droplet formation and stabilization, which are used as carriers for recombinant proteins to lipid droplets in plant-based production systems. This study reports the efficient production of PAF102 in P. pastoris when fused to the rice plant Oleosin 18, whereas no accumulation of Cecropin A was detected. The Ole18-PAF102 fusion protein targets the lipid droplets of the heterologous system where it accumulates to high levels. Interestingly, the production of this fusion protein induces the formation of lipid droplets in yeast cells, which can be additionally enhanced by the coexpression of a diacylglycerol transferase gene that allows a three-fold increase in the production of the fusion protein. Using this high producer strain, PAF102 reaches commercially relevant yields of up to 180 mg/l of yeast culture. Moreover, the accumulation of PAF102 in the yeast lipid droplets facilitates its downstream extraction and recovery by flotation on density gradients, with the recovered PAF102 being biologically active against pathogenic fungi. Our results demonstrate that plant oleosin fusion technology can be transferred to the well-established P. pastoris cell factory to produce the PAF102 antifungal peptide, and potentially other AMPs, for multiple applications in crop protection, food preservation and animal and human therapies.
Note: Número d'acord de subvenció MINECO/BIO2015-68790-C2-2-R
Note: Número d'acord de subvenció MINECO/RTI2018-101115B-C22
Note: Número d'acord de subvenció MINECO/SEV-2015-0533
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: article ; recerca ; publishedVersion
Subject: Antimicrobial peptides ; Antifungal peptides ; Pichia pastoris ; Plant oleosin ; Cecropin A ; PAF peptides ; Lipid droplets
Published in: Frontiers in microbiology, Vol. 10 (June 2019) , art. 1472, ISSN 1664-302X

DOI: 10.3389/fmicb.2019.01472
PMID: 31316491


13 p, 5.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
Articles > Published articles

 Record created 2019-10-14, last modified 2020-08-02



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