Table 3 Comparative account of characteristics of bacterial keratinases.

From: Parametrically optimized feather degradation by Bacillus velezensis NCIM 5802 and delineation of keratin hydrolysis by multi-scale analysis for poultry waste management

Bacteria

Optimum

Catalytic type

Activators

Inhibitors

References

pH

Temp. (°C)

Ochrobactrum intermedium

9.0

40

Metallo-serine

K+, Na+, Ca2+ and Mg2+

PMSF, EDTA, Zn2+, Fe2+, Cu2+, and Mn2+

Sharma and Kango23

Bacillus licheniformis ALW1

8.0

65

Abdel-Fattah et al.25

Bacillus cereus

7.0–9.0

30–45

Metallo

Verma et al.28

Bacillus sp.

7–8

30–37

Serine/metallo

Verma et al.28

Laceyella sacchari YNDH

10.4

70

Mixed Serine/metallo

PMSF, EDTA, DTT

Cu2+, Mn2+, Zn2+, and Co2+

Goda et al.47

Bacillus sp.

11.0

60

Serine

PMSF, H2O2, Ca2+

Genckal and Tari48

Bacillus clausii

11.0

60

Serine

SDS, H2O2

PMSF, Leupeptin

Joo et al.52

Bacillus subtilis DP1

10.0

37

Serine

Ca2+ and Mg2+

PMSF, EDTA Mn2+ and Zn2+

Sanghvi et al.58

Paenibacillus woosongensis TKB2

9.0

50

Serine

Mo+, Fe2+ and Mn2+

PMSF, SDS, EDTA and β-ME

Paul et al. 60

B. velezensis NCIM 5802

10.0

60

Metallo-serine

Ca2+ and Mg2+

EDTA, PMSF, Ag2+ Hg2+ and NaN3

This study

  1. Significant values are given in bold.