Yeast strains

US9297027B1 · kind B1 · utility

Assignees

• The United States of America, as represented by the Secretary of Agriculture · US
• BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY · US

Inventors

• Patricia J. Slininger · Metamora, US
• Stephanie R. Thompson · East Peoria, US
• Venkatesh Balan · Saginaw, US
• Leonardo Da Costa Sousa · Lansing, US
• Bruce E. Dale · Big Rapids, US
• Maureen A. Shea-Andersh · Peoria, US
• Bruce S. Dien · Peoria, US

Key dates

• Filing date: Jan 29, 2014
• Grant date: Mar 29, 2016
• Expiry date: Jan 29, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E50/10
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

Several mutated strains of Scheffersomyces stipitis are generated by repetitive culturing of the parent strain on two types of concentrated hydrolyzates and with ethanol-challenged xylose-fed continuous culture. Isolates collected from various enriched populations are screened and ranked based on relative xylose uptake rate and ethanol yield. Ranking on hydrolyzates with and without nutritional supplementation is used to identify those isolates with best performance across diverse conditions.