Patent · US Active

Zymomonas with improved ethanol production in medium containing concentrated sugars and acetate

US7897396B2 · kind B2 · utility

11Cited by

5References

12Claims

0Family size

Assignees

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

Inventors

Perry G. Caimi · Kennett Square, US
Yat-Chen Chou · Lakewood, US
Mary Ann Franden · Centennial, US
Kyle Knoke · Newark, US
Luan Tao · Claymont, US
Paul V. Viitanen · West Chester, US
Min Zhang · 安丰镇, CN
Yuying Zhang · New Hope, US

Key dates

Filing date	Oct 30, 2008
Grant date	Mar 1, 2011
Priority date	—
Expiry date	Apr 11, 2029

Classification

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

Abstract

Through screening of a Zymomonas mutant library the himA gene was found to be involved in the inhibitory effect of acetate on Zymomonas performance. Xylose-utilizing Zymomonas strains further engineered to reduce activity of the himA gene were found to have increased ethanol production in comparison to a parental strain, when cultured in mixed-sugars medium comprising xylose, and, in particular, in the presence of acetate.

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