Linked Life Data

20717665

Source:http://linkedlifedata.com/resource/pubmed/id/20717665

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2010-10-18
pubmed:abstractText
Escherichia coli strain FBR5, which has been engineered to direct fermentation of sugars to ethanol, was further engineered, using three different constructs, to contain and express the Vitreoscilla hemoglobin gene (vgb). The three resulting strains expressed Vitreoscilla hemoglobin (VHb) at various levels, and the production of ethanol was inversely proportional to the VHb level. High levels of VHb were correlated with an inhibition of ethanol production; however, the strain (TS3) with the lowest VHb expression (approximately the normal induced level in Vitreoscilla) produced, under microaerobic conditions in shake flasks, more ethanol than the parental strain (FBR5) with glucose, xylose, or corn stover hydrolysate as the predominant carbon source. Ethanol production was dependent on growth conditions, but increases were as high as 30%, 119%, and 59% for glucose, xylose, and corn stover hydrolysate, respectively. Only in the case of glucose, however, was the theoretical yield of ethanol by TS3 greater than that achieved by others with FBR5 grown under more closely controlled conditions. TS3 had no advantage over FBR5 regarding ethanol production from arabinose. In 2 L fermentors, TS3 produced about 10% and 15% more ethanol than FBR5 for growth on glucose and xylose, respectively. The results suggest that engineering of microorganisms with vgb/VHb could be of significant use in enhancing biological production of ethanol.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1432-0614
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
88
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1103-12
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Engineering of ethanolic E. coli with the Vitreoscilla hemoglobin gene enhances ethanol production from both glucose and xylose.
pubmed:affiliation
Department of Biological, Chemical, and Physical Sciences, Illinois Institute of Technology, Chicago, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't