RT info:eu-repo/semantics/article T1 Characterization of the keratinolytic activity of three streptomyces strains and impact of their co-cultivation on this activity A1 Martín González, Diego A1 Bordel Velasco, Sergio A1 Santos Beneit, Fernando K1 Streptomyces K1 Staphylococcus K1 Infecciones por estafilococos - Tratamiento K1 Antibiotics K1 Feathers K1 Biofertilizers K1 Fertilizantes y abonos orgánicos K1 Microbiology K1 Co-culture K1 2414.01 Antibióticos K1 2414 Microbiología K1 3308 Ingeniería y Tecnología del Medio Ambiente AB In this study, we describe the characterization of three efficient chicken feather-degrading Streptomyces bacteria isolated from honeybee samples and assess the impact of their co-cultivation on this activity and antistaphylococcal activity. Streptomyces griseoaurantiacus AD2 was the strain showing the highest keratinolytic activity (4000 U × mL−1), followed by Streptomyces albidoflavus AN1 and Streptomyces drozdowiczii AD1, which both generated approximately 3000 U × mL−1. Moreover, a consortium constituted of these three strains was able to use chicken feathers as its sole nutrient source and growth in such conditions led to a significant increase in antibiotic production. S. griseoaurantiacus AD2 was the only strain that exhibited weak antimicrobial activity against Staphylococcus aureus. UPLC analyses revealed that a significant number of peaks detected in the extracts of co-cultures of the three strains were missing in the extracts of individual cultures. In addition, the production of specialized metabolites, such as undecylprodigiosin and manumycin A, was clearly enhanced in co-culture conditions, in agreement with the results of the antimicrobial bioassays against S. aureus. Our results revealed the benefits of co-cultivation of these bacterial species in terms of metabolic wealth and antibiotic production. Our work could thus contribute to the development of novel microbial-based strategies to valorize keratin waste. PB MDPI SN 2076-2607 YR 2023 FD 2023 LK https://uvadoc.uva.es/handle/10324/64331 UL https://uvadoc.uva.es/handle/10324/64331 LA eng NO Microorganisms, 2023, Vol. 11, Nº. 5, 1109 NO Producción Científica DS UVaDOC RD 17-jun-2024