Taxonomic group: bacteria / Firmicutes
(Phylum: Firmicutes)
Associated disease: infection due to Bacillus cereus [ICD11:
XN8PY 
]
NCBI PubMed ID: 8109958Publication DOI: 10.1007/BF02916450Journal NLM ID: 8208561Publisher: Humana Press
Institutions: Biotechnology Division, Regional Research Laboratory, Kerala, India
A potent indigenous bacillus isolate identified as Bacillus cereus (RJ-30) was found to produce Cyclodextrin Glucosyl Transferase (CGTase) extracellularly. Process optimization of various fermentation parameters has been established for optimal growth of bacillus and the maximum enzyme synthesis. The organism had the highest specific growth rate (0.7 mu) with a generation time of 1 h in glucose containing medium at the conditions of pH 7.0, 37 degrees C at 300 rpm, 1.5 vvm of agitation, and aeration. At these conditions, it exhibited the maximum activity of 54 U/mL at the synthesis rate of 2.7 U/L/h. CGTase was produced from the early exponential growth and peaked during the midsporulating stage of about 16 h thereafter maintained at the same level of 50 U/mL. Saccharides containing media were better inducers than starch, and the influence of carbohydrate substrates has shown that enzyme synthesis is promoted by xylose (65 U/mL) and, more remarkably, by the supplementation of wheat bran extract in glucose medium (106 U/mL). This organism produced CGTase stably in a chemostat culturing over a period of 400 h with a maximum productivity of 5.4 kU/L/h (threefold higher than obtained in batch culturing [1.75 kU/L/h]). Comparatively, CGTase was produced by immobilized cells in a continuous fluidized bed reactor for over approx 360 h, at a relatively high dilution rate of 0.88 h-1 resulting in the productivity of 23.0 kU/L/h.
Structure type: cyclic polymer repeating unit ; n=6-8
Trivial name: cyclodextrin
Contained glycoepitopes: IEDB_140629,IEDB_142488,IEDB_144998,IEDB_146664,IEDB_420417,IEDB_420418,IEDB_420421,IEDB_857742,IEDB_983931,SB_192
Enzymes that release or process the structure: cyclodextrin glucosyl transferase
Synthetic data: enzymatic
NCBI Taxonomy refs (TaxIDs): 1396Reference(s) to other database(s): GTC:G05740LL, GlycomeDB:
12100
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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