Saccharomyces Cerevisiae as an Untapped Source of Fungal Chitosan for Antimicrobial Action

• Published in: Applied biochemistry and biotechnology Vol. 193; no. 11; pp. 3765 - 3786
• Main Authors: Afroz, Md. Masirul, Kashem, Md. Nayeem Hasan, Piash, K. M. Prottoy Shariar, Islam, Nafisa
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2021; Springer Nature B.V
• Subjects: Acetic acid; Agricultural wastes; Anti-Infective Agents - chemistry; Anti-Infective Agents - pharmacology; Antiinfectives and antibacterials; Antimicrobial agents; Aspergillus niger; Aspergillus niger - chemistry; Biochemistry; Biomass; Biopolymers; Biotechnology; Chemistry; Chemistry and Materials Science; Chitosan; Chitosan - chemistry; Chitosan - pharmacology; Deacetylation; Fourier transforms; Fungi; Industrial wastes; Infrared spectroscopy; Onions; Original Article; Saccharomyces cerevisiae; Saccharomyces cerevisiae - chemistry; Sodium acetate; Staphylococcus aureus; Staphylococcus aureus - growth & development; Yeast; Yeasts; Zones of inhibition; Baker’s yeast; Degree of deacetylation; FTIR; Aspergillus niger; Staphylococcus aureus
• ISSN: 0273-2289; 1559-0291
• DOI: 10.1007/s12010-021-03639-0

Despite being widely available, Saccharomyces cerevisiae has not been widely explored for direct extraction of chitosan biopolymer for antimicrobial applications. In our study, S. cerevisiae from Baker’s yeast and Aspergillus niger from moldy onion extracts are studied as alternative sources of chitosan; and S cerevisiae chitosan tested for antimicrobial efficacy. The properties of S. cerevisiae chitosan are compared with moldy onion chitosan and shrimp chitosan extracted from shrimp shells. Chitosan extracted from S. cerevisiae is tested for antimicrobial efficacy against Staphylococcus Aureus. The maximum yields of fungal chitosan are 20.85 ± 0.35 mg/g dry S. cerevisiae biomass at 4th day using a culture broth containing sodium acetate, and 16.15 ± 0.95 mg/g dry A. niger biomass at 12th day. The degree of deacetylation (DD%) of the extracted fungal chitosan samples from S. cerevisiae and A. niger is found to be 63.4%, and 61.2% respectively, using Fourier Transform Infrared Spectroscopy. At a concentration of 2 g/L, S. cerevisiae chitosan shows the maximum inhibition zone diameter of 15.48 ± 0.07 mm. Baker’s yeast S cerevisiae biomass and A. niger from moldy onions has not been previously explored as a source of extractible fungal chitosan. This study gives insight that S. cerevisiae and A. niger from agricultural or industrial wastes could be a potential biomass source for production of the chitosan biopolymer. The S. cerevisiae chitosan displayed effective antimicrobial properties against S aureus , indicating the viablitiy of S cerevisae as a resource for extraction of high-quality chitosan.