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Biosynthesis and hyper production of pullulan by a newly isolated strain of Aspergillus japonicus-VIT-SB1.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mishra, Bishwambhar Suneetha, V.
Description	Author Affiliation: Mishra B ( School of Bio Sciences and Technology, VIT University, Vellore, 632 014, Tamil Nadu, India, bishwambharmishra@vit.ac.in.)
Abstract	The main focus of this study was to screen and characterize novel microbial strains isolated from culinary leaf samples, capable of producing high concentrations of pullulan. Hundred isolates were screened from the phylloplane of different plants. The results revealed that eight strains had the capability to produce exopolysaccharide (EPS) and only one potential strain (designated as VIT-SB1) could produce the significant amount of EPS (3.9 ± 0.02%) on the 6th day of the fermentation without optimisation. The EPS synthesized by VIT-SB1 strain was confirmed to be pullulan on the basis of the results of FT-IR, HPLC and the enzymatic (Pullulanase) analysis. More than 91% hydrolysis of pullulan by pullulanase enzyme also indicated the presence of (1 â 6) glycosidic linkages of (1 â 4) linked maltotriose units. This VIT-SB1 strain was identified as Aspergillus japonicus based on the nucleotide sequence of the D1/D2 domain of Large-Subunit rRNA gene. The sequence was submitted to the GenBank Nucleotide sequence database with Accession No: KC128815. This study has confirmed that pullulan production capacity of this novel strain and Aureobasidium pullulans are comparable. Hence Aspergillus japonicus-VIT-SB1 strain can be commercially exploited as a potential pullulan producing strain.
File Format	HTM / HTML
ISSN	09593993
Issue Number	7
Volume Number	30
e-ISSN	15730972
Journal	World Journal of Microbiology and Biotechnology
Language	English
Publisher	Springer
Publisher Date	2014-07-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Discipline Microbiology Molecular Sequence Data Biosynthesis Metabolism Fungal Polysaccharides Journal Article Discipline Biotechnology Aspergillus Genes, Rrna Glycoside Hydrolases Glucans Genetics
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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