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Table 3 Proteolytic enzymes from archaea

From: Biotechnological applications of archaeal enzymes from extreme environments

Type of protease

Organism

Type of enzyme

Enzyme properties

References

Optimal temperature (°C)

Optimal pH

Thermostability

Serine proteases

Desulforococcus strain Tok12S1

Native

95

7.2

70–90 min, 95 °C

[16]

Pyrobaculum aerophilum IM2

Native

100–130

Neutral-alkaline

Not reported

[17]

Staphylothermus marinus

Native

90

9

Not reported

[18]

Thermococcus kodakaraensis

Recombinant

100

7–11.5

100 min, 100 °C

[15]

Haloferax lucentensis VKMM 007

Native

60

8.0

> 30 min, 60 °C

[20]

Thiol protease

Pyrococcus horikoshi OT3

Recombinant

80

8.5

Not reported

[14]

Acidic protease

Sulfolobus solfataricus P2

Native

70

2

Not reported

[19]