RT Journal Article T1 Use of Synthetic Genes for Cloning, Production and Functional Expression of the Bacteriocins Enterocin A and Bacteriocin E 50-52 by Pichia pastoris and Kluyveromyces lactis A1 Jiménez Martínez, Juan J. A1 Borrero Del Pino, Juan A1 Gútiez Sainz-Pardo, Loreto A1 Arbulu Ruiz, Sara A1 Cintas Izarra, Luis Miguel A1 Herranz Sorribes, Carmen A1 Hernández Cruza, Pablo Elpidio AB The use of synthetic genes may constitute a successful approach for the heterologous production and functional expression of bacterial antimicrobial peptides (bacteriocins) by recombinant yeasts. In this work, synthetic genes with adapted codon usage designed from the mature amino acid sequence of the bacteriocin enterocin A (EntA), produced by Enterococcus faecium T136, and the mature bacteriocin E 50-52 (BacE50-52), produced by E. faecium NRRL B-32746, were synthesized. The synthetic entA and bacE50-52 were cloned into the protein expression vectors pPICZαA and pKLAC2 for transformation of derived vectors into Pichia pastoris X-33 and Kluyveromyces lactis GG799, respectively. The recombinant vectors were linearized and transformed into competent cells selecting for P. pastoris X-33EAS (entA), P. pastoris X-33BE50-52S (bacE50-52), K. lactis GG799EAS (entA), and K. lactis GG799BE50-52S (bacE50-52). P. pastoris X-33EAS and K. lactis GG799EAS, but not P. pastoris X-33BE50-52S and K. lactis GG799BE50-52S, showed antimicrobial activity in their supernatants. However, purification of the supernatants of the producer yeasts permitted recovery of the bacteriocins EntA and BacE50-52. Both purified bacteriocins were active against Gram-positive bacteria such as Listeria monocytogenes but not against Gram-negative bacteria, including Campylobacter jejuni. PB Springer SN 1073-6085 YR 2014 FD 2014 LK https://hdl.handle.net/20.500.14352/116681 UL https://hdl.handle.net/20.500.14352/116681 LA eng NO Jiménez, J. J., Borrero, J., Gútiez, L., Arbulu, S., Herranz, C., Cintas, L. M., & Hernández, P. E. (2014). Use of synthetic genes for cloning, production and functional expression of the bacteriocins enterocin A and bacteriocin E 50-52 by Pichia pastoris and Kluyveromyces lactis. Molecular Biotechnology, 56(6), 571-583. https://doi.org/10.1007/S12033-014-9731-7 NO Ministerio de Economía y Competitividad (España) NO Ministerio de Ciencia e Innovación (España) NO Banco de Santander Central Hispano NO Comunidad de Madrid NO Universidad Complutense de Madrid DS Docta Complutense RD 16 abr 2025