Keratinases Produced by , and Isolated from Human Hair: Yield and Activity.

Twenty fungal strains belonging to 17 species and isolated from male scalp hair were tested for their capacity to hydrolyze keratinous material from chicken feather. The identification of the three most efficient species was confirmed by sequencing of the internal transcribed spacer (ITS) region of rDNA. Activities of fungal keratinases produced by (strain AUMC 10920), (AUMC 10935), and (AUMC 10937) were 113, 120, and 130 IU mg enzymes, respectively. The most favorable conditions were at pH 8.0 and 50 °C. Keratinase activity was markedly inhibited by EDTA and metal ions Ca, Co, Ni, Cu, Fe, Mg, and Zn, with differences between the fungal species. To the best of our knowledge, this is the first study on the activity of keratinase produced by , and . keratinase was the most active, but the species is not recommended because of its known phytopathogenicty. has many known biotechnological solutions and here we add another application of the species, as producer of keratinases. We introduce as new producer of active fungal keratinases for biotechnological solutions, such as in the management of keratinous waste in poultry industry.