Exploiting the Diversity of Saccharomycotina Yeasts To Engineer Biotin-Independent Growth of Saccharomyces cerevisiae

June 09, 2020 | Biotechnology

Reading time: 1-2 minutes

Lab.Equipment has sourced a new article from the Biotech industry for you. This one is published by Applied and Environmental Microbiology (AEM):

Biotin, an important cofactor for carboxylases, is essential for all kingdoms of life. Since native biotin synthesis does not always suffice for fast growth and product formation, microbial cultivation in research and industry often requires supplementation of biotin. De novo biotin biosynthesis in yeasts is not fully understood, which hinders attempts to optimize the pathway in these industrially relevant microorganisms. Previous work based on laboratory evolution of Saccharomyces cerevisiae for biotin prototrophy identified Bio1, whose catalytic function remains unresolved, as a bottleneck in biotin synthesis. This study aimed at eliminating this bottleneck in the S. cerevisiae laboratory strain CEN.PK113-7D. A screening of 35 Saccharomycotina yeasts identified six species that grew fast without biotin supplementation. Overexpression of the S. cerevisiae BIO1 (ScBIO1) ortholog isolated from one of these biotin prototrophs, Cyberlindnera fabianii, enabled fast growth of strain CEN.PK113-7D in biotin-free medium. Similar results were obtained by single overexpression of C. fabianii BIO1 (CfBIO1) in other laboratory and industrial S. cerevisiae strains. However, biotin prototrophy was restricted to aerobic conditions, probably reflecting the involvement of oxygen in the reaction catalyzed by the putative oxidoreductase CfBio1. In aerobic cultures on biotin-free medium, S. cerevisiae strains expressing CfBio1 showed a decreased susceptibility to contamination by biotin-auxotrophic S. cerevisiae. This study illustrates how the vast Saccharomycotina genomic resources may be used to improve physiological characteristics of industrially relevant S. cerevisiae.

IMPORTANCE The reported metabolic engineering strategy to enable optimal growth in the absence of biotin is of direct relevance for large-scale industrial applications of S. cerevisiae. Im... View the whole article at the Applied and Environmental Microbiology (AEM) Blog.

Covering Bio Technology applications including isolation testing or direct sequencing applications and scouting for reliable Biotechnology lab products? You can depend on Lab.Equipment for an extensive collection of products from established brands like:

We showcase valuable and user-friendly Biotech laboratory equipment highly recommended for various Bio Technology tests such as:

Accomplishing microbiology, forensics, environmental applications? Count on Lab.Equipment to boost your efficiency. Get accurate and precise lab equipment for whatever application here.

Back To Top
We are fully compliant with the GDPR laws. We promise to safeguard your data and protect your privacy rights.