scholarly journals Antibacterial activity of Cyt1Aa from Bacillus thuringiensis subsp. israelensis

Microbiology ◽  
2008 ◽  
Vol 154 (11) ◽  
pp. 3529-3536 ◽  
Author(s):  
Rivka Cahan ◽  
Hen Friman ◽  
Yeshayahu Nitzan
Plasmid ◽  
2008 ◽  
Vol 59 (2) ◽  
pp. 134-138 ◽  
Author(s):  
Géraldine A. Van der Auwera ◽  
Sophie Timmery ◽  
Jacques Mahillon

2012 ◽  
Vol 65 (2) ◽  
pp. 121-127
Author(s):  
Marina Nisnevitch ◽  
Svetlana Nikonov ◽  
Yeshayahu Nitzan

1987 ◽  
Vol 169 (2) ◽  
pp. 796-801 ◽  
Author(s):  
M A Pfannenstiel ◽  
G Muthukumar ◽  
G A Couche ◽  
K W Nickerson

2000 ◽  
Vol 40 (4) ◽  
pp. 227-232 ◽  
Author(s):  
White-Shang Kuo ◽  
Jong-Huon Lin ◽  
Ching-Chou Tzeng ◽  
Shui-Shang Kao ◽  
Kin-Fu Chak

2006 ◽  
Vol 52 (7) ◽  
pp. 651-657 ◽  
Author(s):  
Luis Morales de la Vega ◽  
J Eleazar Barboza-Corona ◽  
Maria G Aguilar-Uscanga ◽  
Mario Ramírez-Lepe

A chitinolytic enzyme from Bacillus thuringiensis subsp. aizawai has been purified and its molecular mass was estimated ca. 66 kDa by sodium dodecyl sulfate – polyacryamide gel electrophoresis (SDS–PAGE). The enzyme was able to hydrolyze chitin to chitobiosides but not carboxymethylcellulose, cellulose, pullulan, and laminarin. Optimal pH and temperature were detected at 6 and 50 °C, respectively. Stability, in the absence of substrate, was observed at temperatures less than 60 °C and pH between 5 and 8. Enzyme activity was significantly inhibited by K+ and EDTA and completely inhibited by Hg2+. Purified chitinase showed lytic activity against cell walls from six phytopathogenic fungi and inhibited the mycelial growth of both Fusarium sp. and Sclerotium rolfsii. The biocontrol efficacy of the enzyme was tested in the protection of bean seeds infested with six phytopathogenic fungi.Key words: chitinase, Bacillus thuringiensis, purification, phytopathogenic fungi.


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