pISSN 1225-7117 eISSN 2288-8268

Native bacteria and fungi with keratinase activity

Strains Source of isolation Fermentation conditions Optimal enzyme activity References
Feather (g/L) Other substrates (g/L) 2) Time (days) Degradation (%) pH Temp (°C) Time (days) Enzyme activity3) (U/mL)
Bacillus spp. B. licheniformis ALW1 Keratinous wastes 2 Glu 10 Pep 10 YE 3 1 64 8.0 65? 4 72.2 [34]
B. licheniformis NS-3 Poultry farm soil Unknown - 7 100 7.0 60 7 10.76 [35]
B. subtilis AMR Feather agro-industrial residues 10 YE 0.1 6 98.93 8.0 37 6 360.6 [36]
B. subtilis 8 Feather disposal site 10 - 2.5 83.7 - - 2 21.6 [37]
Other bacteria Arthrobacter sp. NFH5 Soil - - - - 8.0 40 3 26.57 [38]
Pseudomonas sp. LM19 Feather dumping site 0.1 YE 0.01 2.5 86 - - 2.5 127 [39]
Thermoactinomy ces sp. RM4 Soil from waste yard site 10 - 4 100 10.0 80 - 30-40 [40]
Aspergillus spp. A. nidulans K7 Poultry soil 15 - - 53.4 8.5 40 5 55.8 [41]
Aspergillus sp. DHE7 Soil from poultry farm Unknown - 4 100 - - 4 298 [42]
A. oryzae NRRL-447 - 10 YE 2 5 100 7.0 70 5 111.64) [43]
Other fungi Fusarium oxysporum Chicken feathers 10 - 7 36.11 - - 6 149 [44]
101) - 6 59.20 - - 6 243.25

1)Swine hair was used.

2)Glu; glucose, Pep; peptone, YE; yeast extract.

3)Enzyme activity was measured using keratinaceous substrates such as azokeratin, keratin azure, and feather powders.

4)Specific enzyme activity (U/mg).
Korean Society for Biotechnology and Bioengineering Journal 2022;37:1~10 https://doi.org/10.7841/ksbbj.2022.37.1.1
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