Updated publication reference for PubMed record(s): 33013758. In this study, we performed a global quantitative proteomic analysis under extreme temperatures, pH, hydrostatic pressure (HP) and salinity on an archaeal strain, Thermococcus eurythermalis A501. Here is the result of NaCl adaptation: low salinity (1.5% NaCl, w/v) and high salinity (4.5% NaCl, w/v), and the optimal culture condition (85°C, pH 7, 2.3% NaCl, 0.1 MPa or 10 MPa) was used as the control.