Abstract
Keratin-containing wastes (feathers and bristles) make up the majority of all animal wastes, a fast-growing agricultural sector that annually increases production volume. The development of methods for environmentally friendly processing of such waste to obtain valuable resources (amino acids and oligopeptides) is an important task in modern science, including biotechnology. A way to dispose of livestock waste according to the current trends of the development of green economy is the use of microorganisms and their enzymes. The possibility of production of keratinolytic enzymes of Aspergillus clavatus VKPM F-1593 has been studied under submerged conditions with different sources of nitrogen and carbon, including the growth of the producer on animal waste. The highest target activity (96.1 E) was achieved using mixed sources of carbon and nitrogen: an inorganic source (sodium nitrate), an easily digestible organic source (fish meal hydrolysate) and a hard-to-get organic source (ground chicken feather). The variation in the content of different substrates in the fermentation media has made it possible not only to regulate the level of proteolytic activity, but also to reach the peak of producer activity on different days of cultivation. The specific activity of the keratinase of A. clavatus VKPM F-1593 (pI 9.3) with respect to different protein substrates has been compared with the activity of the commercial proteinase K preparation. Both enzymes have shown a similar level of activity with respect to most of the used substrates. However, the protease of A. clavatus VKPM F-1593 has had a greater total proteolytic activity, which confirms the prospective use of this culture for the biodegradation of animal waste.
REFERENCES
Safaric, R., Fras Zemljic, L., Novak, M., Dugonik, B., Bratina, B., Gubeljak, N., Bolka, S., and Strnad, S., Preparation and characterisation of waste poultry feathers composite fibreboards, Materials, 2020, vol. 13, no. 21, p. 4964.
Nnolim, N.E., Udenigwe, C.C., Okoh, A.I., and Nwodo, U.U., Microbial keratinase: next generation green catalyst and prospective applications, Front. Microbiol., 2020, vol. 11, p. 580164.
Chen, H., Gao, S., Li, Y., Xu, H.J., Li, W., Wang, J., and Zhang, Y., Valorization of livestock keratin waste: application in agricultural fields, Int. J. Environ. Res. Public Health, 2022, vol. 19, no. 11, p. 6681.
de Menezes, C.L.A., Santos, R.D.C., Santos, M.V., Boscolo, M., da Silva, R., Gomes, E., and da Sil-va, R.R., Industrial sustainability of microbial keratinases: production and potential applications, World J. Microbiol. Biotechnol., 2021, vol. 37, no. 5, p. 86.
Sypka, M., Jodłowska, I., and Białkowska, A.M., Keratinases as versatile enzymatic tools for sustainable development, Biomolecules, 2021, vol. 11, no. 12, p. 1900.
Tamreihao, K., Mukherjee, S., Khunjamayum, R., Devi, L.J., Asem, R.S., and Ningthoujam, D.S., Feather degradation by keratinolytic bacteria and biofertilizing potential for sustainable agricultural production, J. Basic Microbiol., 2019, vol. 59, no. 1, pp. 4–13.
Gong, J.S., Ye, J.P., Tao, L.Y., Su, C., Qin, J., Zhang, Y.Y., Li, H., Li, H., Xu, Z.H., and Shi, J.S., Efficient keratinase expression via promoter engineering strategies for degradation of feather wastes, Enzyme Microb. Technol., 2020, vol. 137, p. 109550.
Li, Q., Structure, application, and biochemistry of microbial keratinases, Front. Microbiol., 2021, vol. 12, p. 674345.
Liaqat, I., Ali, S., Butt, A., Durrani, A.I., Zafar, U., Saleem, S., Naseem, S., and Ahsan, F., Purification and characterization of keratinase from Bacillus licheniformis dcs1 for poultry waste processing, J. Oleo Sci., 2022, vol. 71, no. 5, pp. 693–700.
Wang, Z., Chen, Y., Yan, M., Li, K., Okoye, C.O., Fang, Z., Ni, Z., and Chen, H., Research progress on the degradation mechanism and modification of keratinase, Appl. Microbiol. Biotechnol., 2023, vol. 107, no. 4, pp. 1003–1017.
Gupta, R., Rajput, R., Sharma, R., and Gupta, N., Biotechnological applications and prospective market of microbial keratinases, Appl. Microbiol. Biotechnol., 2013, vol. 97, no. 23, pp. 9931–9940.
Shestakova, A., Lyamina, V., Timorshina, S., and Osmolovskiy, A., Patented keratinolytic enzymes for industrial application: an overview, Recent Pat. Biotechnol., 2023, vol. 17, no. 4, pp. 346–363.
Kushnirov, V.V., Dergalev, A.A., and Alexandrov, A.I., Proteinase K resistant cores of prions and amyloids, Prion, 2020, vol. 14, no. 1, pp. 11–19.
Brilhante, R.S.N., Lopes, R.G.P., de Aguiar, L., de Oliveira, J.S., Araújo, G.D.S., Paixão, G.C., Pereira-Neto, W.A., Freire, R.S., Nunes, J.V.S., de Lima, R.P., Santos, F.A., Sidrim, J.J.C., and Rocha, M.F.G., Inhibitory effect of proteinase K against dermatophyte biofilms: an alternative for increasing the antifungal effects of terbinafine and griseofulvin, Biofouling, 2022, vol. 38, no. 3, pp. 286–297.
De Souza, P.M., Bittencourt, M.L., and Caprara, C.C., A biotechnology perspective of fungal proteases, Braz. J. Microbiol., 2015, vol. 46, no. 2, pp. 337–346.
Alwakeel, S.S., Ameen, F., Al Gwaiz, H., Sonbol, H., Alghamdi, S., Moharram, A.M., and Al-Bedak, O.A., Keratinases produced by Aspergillus stelliformis, Aspergillus sydowii, and Fusarium brachygibbosum isolated from human hair: yield and activity, J. Fungi, 2021, vol. 7, no. 6, p. 471.
Qiu, J., Barrett, K., Wilkens, C., and Meyer, A.S., Bioinformatics based discovery of new keratinases in protease family M36, New Biotechnol., 2022, vol. 68, pp. 19–27.
Timorshina, S., Popova, E., Kreyer, V., Baranova, N., and Osmolovskiy, A., Keratinolytic properties of Aspergillus clavatus promising for biodegradation, Int. J. Environ. Res. Public Health, 2022, vol. 19, no. 21, p. 13939.
Timorshina, S.N., Osmolovsky, A.A., and Aleksandrova, A.V., The Aspergillus clavatus strain is a producer of proteolytic enzymes with keratinolytic activity, RF Patent No. 2774366, 2022.
Osmolovskiy, A.A., Popova, E.A., Kreyer, V.G., Baranova, N.A., and Egorov, N.S., Fibrinolytic and collagenolytic activity of extracellular proteinases of the strains of micromycetes Aspergillus ochraceus L-1 and Aspergillus ustus 1, Moscow Univ. Biol. Sci. Bull., 2016, vol. 71, no. 1, pp. 62–66.
Timorshina, S.N., Popova, E.A., Galiakberova, A.A., Ochneva, A.G., and Osmolovskiy, A.A., Aspergillus proteolytic enzymes hydrolyzing fibrillar proteins for biomedicine and biotechnological processes, Moscow Univ. Biol. Sci. Bull., 2022, vol. 77, no. 3, pp. 178–183.
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This research was supported by the Russian Science Foundation, project no. 22-24-00674.
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Timorshina, S.N., Popova, E.A., Kuleshova, K.I. et al. Keratinolytic Potential of the Micromycete Aspergillus clavatus VKPM F-1593 and Comparison of Its Enzymes with the Commercial Keratinase Preparation. Moscow Univ. Biol.Sci. Bull. 78, 225–231 (2023). https://doi.org/10.3103/S0096392524600418
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DOI: https://doi.org/10.3103/S0096392524600418