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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2005-7-25
pubmed:abstractText
Using an inosine-producing mutant of Escherichia coli, the contributions of the central carbon metabolism for overproducing inosine were investigated. Sodium gluconate instead of glucose was tested as a carbon source to increase the supply of ribose-5-phosphate through the oxidative pentose phosphate pathway. The edd (6-phosphogluconate dehydrase gene)-disrupted mutant accumulated 2.5 g/l of inosine from 48 g/l of sodium gluconate, compared with 1.4 g/l of inosine in the edd wild strain. The rpe (ribulose phosphate 3-epimerase gene)-disrupted mutant resulted in low cell growth and low inosine production on glucose and on gluconate. The disruption of pgi (glucose-6-phosphate isomerase gene) was effective for increasing the accumulation of inosine from glucose but resulted in low cell growth. The pgi-disrupted mutant accumulated 3.7 g/l of inosine from 40 g/l of glucose when 8 g/l of yeast extract was added to the medium. Furthermore, to improve effective utilization of adenine, the yicP (adenine deaminase gene)-disrupted mutant was evaluated. It showed higher inosine accumulation, of 3.7 g/l, than that of 2.8 g/l in the yicP wild strain when 4 g/l of yeast extract was added to the medium.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0916-8451
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1248-55
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Effects of edd and pgi disruptions on inosine accumulation in Escherichia coli.
pubmed:affiliation
Fermentation and Biotechnology Laboratories, Ajinomoto Co. Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa 210-8681, Japan.
pubmed:publicationType
Journal Article, Comparative Study