ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS, cilt.94, sa.4, ss.1-8, 2022 (SCI-Expanded)
β-Glucan is an essential component of the cell walls of grains such as oats
and barley. 1,3-1,4-β-D-glucan 4-glucanhydrolase (β-glucanase or lichenase) (EC 3.2.1.73)
is an enzyme with the ability to hydrolyze β-glucans. In this research, β-Glucan which
is a good source of feed additive fi sh probiotics, was used in order to benefi t from feed
quality in fi shery products, to increase live weight gain and to strengthen the immune
system. In this study, recombinant vector pNW33N carrying the β-(1,3-1,4) glucanase
(lichenase) gene of Streptococcus bovis genome was transferred to Bacillus subtilis
RSKK246 (CMCase+) strain by electroporation. Subsequently, electrotransformation was
performed on LB-agar plates containing lichenan and enzymatic activity regions of
recombinant B. subtilis RSKK246 colonies were observed by staining with Congo red. In
addition, the DNA from the recombinant plasmid pNW33N+Lichenase (pNW33NLic) was
cut on both the BamHI and HindIII endonucleases and observed on the lichenase gene
(1800 bp) agarose gel. On the other hand, the protein band corresponding to 26 kDa of
the recombinant enzyme was observed by zymogram analysis. These results indicate
that the β-(1,3-1,4) glucanase gene has been successfully expressed to the B. subtilis
strain RSKK246