Increase in Cellulose Production by Sulfaguanidine - resistant Mutants Deriyed
نویسندگان
چکیده
The re]ationship between bacterial cellulose production and growth was inyestigated and the production was found to be associated with growth. Thus, it was expected that enhanced growth would lead to enhanced cellulose production. On the other hand, factors which promote the growth of and cellulose production by Aeetobacter rytinnm subsp. suerqtlirmentans BPR2001 were investigated and it was found that addition of
منابع مشابه
Relationship between Sulfaguanidine Resistance and Increased Cellulose Production in Acetobacter xylinum BPR3001E.
The mechanism of the increased cell growth and cellulose production of Acetobacter xylinum subsp. sucrofermentans BPR3001E, a sulfaguanidine (SG)-resistant mutant, was investigated. We found that adding p-aminobenzoic acid (PABA) to cultures of the parent strain, BPR2001, led to increased levels of intracellular adenosine-related purine compounds and increased cellulose production. Furthermore,...
متن کاملProduction of bacterial cellulose by agitation culture systems
An economical mass production system of bacterial cellulose (BC) on agitated culture was constructed. We frst conducted screening of BC producers in agitated culture. A total of 2096 strains were isolated from natural sources and the best BC producing strain, BPR2001, was selected. According to the taxonomic examination, we concluded that the strain belongs to a new subspecies, Acetobacter xyli...
متن کاملBreeding of a 5-Fluorouridine-resistant Mutant with Increased Cellulose Production from Acetobacter xylinum subsp. nonacetoxidans.
UDP-glucose (UDP-G), the direct precursor of cellulose, is known to be produced from UTP and glucose-1-phosphate. In an attempt to increase UTP biosynthesis, 5-fluorouridine (5-FUR: a pyrimidine analog)-resistant mutants were obtained using Acetobacter xylinum subsp. nonacetoxidans 757 as the parent strain. One of the 5-FUR-resistant mutants, FUR-35, showed about 40% higher cellulose productivi...
متن کاملStudy of Organic Solvent Tolerance and Increased Antibiotic Resistance Properties in E. coli gyrA Mutants
Ciprofloxacin is one of the most widely used antibiotics for the treatment of several infections caused by Gram-negative bacteria, like E. coli. Changes in gyrA, encoding GyrA subunit of DNA gyrase, cause the resistance to ciprofloxacin. Some ciprofloxacin resistant gyrA mutants acquired constitutive expression of marRAB operon due to the gaining mutations in marR, a repressor of this operon...
متن کاملExpression of tolC and organic solvent tolerance of Escherichia coli ciprofloxacin resistant mutants
AcrAB-TolC is a major efflux pump in Escherichia coli. It was reported that tolC is overexpressed and involves in improving the organic solvent tolerance level in Escherichia coli marR mutants that are resistant to several antibiotics, such as ciprofloxacin. Low and intermediate levels resistance did not improve organic solvent tolerance. Thus, in this descriptive-experimental study it was deci...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2018