Halophilic proteins are isolated from halophilic microorganisms,
which require salt for growth. However, there are also numerous
proteins that tolerate high salt concentrations, which are not isolated
from halophilic sources. These proteins are defined as halotolerants
(Graziano & Merlino, 2014). Halotolerant enzymes
remain active over a broad range of NaCl concentration, without
any specific salt dependence. According to salt tolerance, most food
fermentations are carried out by non-halophilic microorganisms;
however, specific proteins produced by these fermenting bacteria
could be adapted to remain active under high salt concentrations.
To date, some research on lipases from halophilic bacteria has been
carried out (Schreck & Grunden, 2014), but attention to halotolerant
lipases from non-halophilic microorganisms should be also
done.