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Bioprocessing of some agro-industrial residues for endoglucanase production by the new subsp.; Streptomyces albogriseolus subsp. cellulolyticus strain NEAE-J
El-Naggar, Noura El-Ahmady; Abdelwahed, Nayera A.M.; Saber, Wesam I.A.; Mohamed, Asem A..
  • El-Naggar, Noura El-Ahmady; City of Scientific Research and Technological Applications. Genetic Engineering and Biotechnology Research Institute. Department of Bioprocess Development. Alexandria. EG
  • Abdelwahed, Nayera A.M.; City of Scientific Research and Technological Applications. Genetic Engineering and Biotechnology Research Institute. Department of Bioprocess Development. Alexandria. EG
  • Saber, Wesam I.A.; City of Scientific Research and Technological Applications. Genetic Engineering and Biotechnology Research Institute. Department of Bioprocess Development. Alexandria. EG
  • Mohamed, Asem A.; City of Scientific Research and Technological Applications. Genetic Engineering and Biotechnology Research Institute. Department of Bioprocess Development. Alexandria. EG
Braz. j. microbiol ; 45(2): 743-751, Apr.-June 2014. ilus, tab
Article in English | LILACS | ID: lil-723113
ABSTRACT
The use of low cost agro-industrial residues for the production of industrial enzymes is one of the ways to reduce significantly production costs. Cellulase producing actinomycetes were isolated from soil and decayed agricultural wastes. Among them, a potential culture, strain NEAE-J, was selected and identified on the basis of morphological, cultural, physiological and chemotaxonomic properties, together with 16S rDNA sequence. It is proposed that strain NEAE-J should be included in the species Streptomyces albogriseolus as a representative of a novel sub-species, Streptomyces albogriseolus subsp. cellulolyticus strain NEAE-J and sequencing product was deposited in the GenBank database under accession number JN229412. This organism was tested for its ability to produce endoglucanase and release reducing sugars from agro-industrial residues as substrates. Sugarcane bagasse was the most suitable substrate for endoglucanase production. Effects of process variables, namely incubation time, temperature, initial pH and nitrogen source on production of endoglucanase by submerged fermentation using Streptomyces albogriseolus subsp. cellulolyticus have been studied. Accordingly optimum conditions have been determined. Incubation temperature of 30 ºC after 6 days, pH of 6.5, 1% sugarcane bagasse as carbon source and peptone as nitrogen source were found to be the optimum for endoglucanase production. Optimization of the process parameters resulted in about 2.6 fold increase in the endoglucanase activity. Therefore, Streptomyces albogriseolus subsp. cellulolyticus coud be potential microorganism for the intended application.
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Full text: Available Index: LILACS (Americas) Main subject: Streptomyces / Cellulase Type of study: Prognostic study Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2014 Type: Article Affiliation country: Egypt Institution/Affiliation country: City of Scientific Research and Technological Applications/EG

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Full text: Available Index: LILACS (Americas) Main subject: Streptomyces / Cellulase Type of study: Prognostic study Language: English Journal: Braz. j. microbiol Journal subject: Microbiology Year: 2014 Type: Article Affiliation country: Egypt Institution/Affiliation country: City of Scientific Research and Technological Applications/EG