Patent · US Active

Xylitol synthesis mutant of xylose-utilizing zymomonas for ethanol production

US7741119B2 · kind B2 · utility

47Cited by

5References

9Claims

0Family size

Assignees

E.I. DU PONT DE NEMOURS AND COMPANY · US
Alliance for Sustainable Energy, LLC · US

Inventors

Paul V. Viitanen · West Chester, US
Yat-Chen Chou · Lakewood, US
Carol M. McCutchen · Dickson, US
Min Zhang · 安丰镇, CN

Key dates

Filing date	Sep 27, 2007
Grant date	Jun 22, 2010
Priority date	—
Expiry date	Sep 28, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E50/10
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

A strain of xylose-utilizing Zymomonas was engineered with a genetic modification to the glucose-fructose oxidoreductase gene resulting in reduced expression of GFOR enzyme activity. The engineered strain exhibits reduced production of xylitol, a detrimental by-product of xylose metabolism. It also consumes more xylose and produces more ethanol during mixed sugar fermentation under process-relevant conditions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.