Innovative Artificial-Intelligence- Based Approach for the Biodegradation of Feather Keratin by Bacillus paramycoides, and Cytotoxicity of the Resulting Amino Acids

Zeiad Moussa; Doaa B Darwish; Salma S Alrdahe; WesamEldin I A Saber

doi:10.3389/fmicb.2021.731262

Innovative Artificial-Intelligence- Based Approach for the Biodegradation of Feather Keratin by Bacillus paramycoides, and Cytotoxicity of the Resulting Amino Acids

Front Microbiol. 2021 Oct 22:12:731262. doi: 10.3389/fmicb.2021.731262. eCollection 2021.

Authors

Zeiad Moussa¹, Doaa B Darwish^{2

3}, Salma S Alrdahe³, WesamEldin I A Saber¹

Affiliations

¹ Microbial Activity Unit, Microbiology Department, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt.
² Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt.
³ Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia.

Abstract

The current study reported a new keratinolytic bacterium, which was characterized as Bacillus paramycoides and identified by 16S rRNA, and the sequence was then deposited in the GenBank (MW876249). The bacterium was able to degrade the insoluble chicken feather keratin (CFK) into amino acids (AA) through the keratinase system. The statistical optimization of the biodegradation process into AA was performed based on the Plackett-Burman design and rotatable central composite design (RCCD) on a simple solid-state fermentation medium. The optimum conditions were temperature, 37°C, 0.547 mg KH₂PO₄, 1.438 mg NH₄Cl, and 11.61 days of incubation. Innovatively, the degradation of the CFK process was modeled using the artificial neural network (ANN), which was better than RCCD in modeling the biodegradation process. Differentiation of the AA by high-performance liquid chromatography (HPLC) revealed the presence of 14 AA including essential and non-essential ones; proline and aspartic acids were the most dominant. The toxicity test of AA on the HepG2 cell line did not show any negative effect either on the cell line or on the morphological alteration. B. paramycoides ZW-5 is a new eco-friendly tool for CFK degradation that could be optimized by ANN. However, additional nutritional trials are encouraged on animal models.

Keywords: artificial intelligence; artificial neural network; biodegradation; bioremediation; keratinase; mineral salts; response surface methodology.