Table 2.
Main enzymes secreted by Bacillus strains and their functions in monogastric animals
| Enzyme | Producer strain | Substrate | Function | Reference |
|---|---|---|---|---|
| Protease | Bacillus cereus AT | Proteins | Contributes to proteins digestion and improves FCR and weight gain | [106] |
| Lipase | Bacillus methylotrophicus PS3 | Lipids | Digests lipids | [107] |
| Cellulase | Bacillus subtilis BY-3 | Cellulose | Hydrolyzes cellulose, and enhances fiber degradation | [108] |
| Xylanase | Bacillus subtilis E44 | Xylans | Contributes to degradation of NSP as well as release of nutrients and decreases intestinal chyme viscosity increasing animal production efficiency | [106] |
| Phytase | Bacillus subtilis US417 | Phytic acid | Releases phosphorus (P) from phytates contributing to better bioavailability of P and vital minerals and enhancement of growth performance and health of animals along with environment protection | [109] |
| Keratinase | Bacillus subtilis S14 | Keratin | Degrades keratin and improve digestion | [110] |
| Mannanase | Bacillus amyloliquefaciens 10A1 | Mannans | Contributes to degradation of NSP and decreases intestinal chyme viscosity increasing animal production performance | [111] |