Pressure adaptation is linked to thermal adaptation in salt-saturated marine habitats
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In: Environmental Microbiology, Vol. 17, No. 2, 17.12.2014, p. 332-345.
Research output: Contribution to journal › Article › peer-review
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T1 - Pressure adaptation is linked to thermal adaptation in salt-saturated marine habitats
AU - Alcaide, M.
AU - Stogios, P.J.
AU - Lafraya, A.
AU - Tchigvintsev, A.
AU - Flick, R.
AU - Bargiela, R.
AU - Chernikova, T.N.
AU - Reva, O.N.
AU - Hai, T.
AU - Leggewie, C.C.
AU - Katzke, N.
AU - La Cono, V.
AU - Matesanz, R.
AU - Jebbar, M.
AU - Jaeger, K.
AU - Yakimov, M.M.
AU - Yakunin, A.F.
AU - Golyshin, P.N.
AU - Golyshina, O.V.
AU - Savchenko, A.
AU - Ferrer, M.
PY - 2014/12/17
Y1 - 2014/12/17
N2 - The present study provides a deeper view of protein functionality as a function of temperature, salt and pressure in deep-sea habitats. A set of eight different enzymes from five distinct deep-sea (3040–4908 m depth), moderately warm (14.0–16.5°C) biotopes, characterized by a wide range of salinities (39–348 practical salinity units), were investigated for this purpose. An enzyme from a ‘superficial’ marine hydrothermal habitat (65°C) was isolated and characterized for comparative purposes. We report here the first experimental evidence suggesting that in salt-saturated deep-sea habitats, the adaptation to high pressure is linked to high thermal resistance (P value = 0.0036). Salinity might therefore increase the temperature window for enzyme activity, and possibly microbial growth, in deep-sea habitats. As an example, Lake Medee, the largest hypersaline deep-sea anoxic lake of the Eastern Mediterranean Sea, where the water temperature is never higher than 16°C, was shown to contain halopiezophilic-like enzymes that are most active at 70°C and with denaturing temperatures of 71.4°C. The determination of the crystal structures of five proteins revealed unknown molecular mechanisms involved in protein adaptation to poly-extremes as well as distinct active site architectures and substrate preferences relative to other structurally characterized enzymes.
AB - The present study provides a deeper view of protein functionality as a function of temperature, salt and pressure in deep-sea habitats. A set of eight different enzymes from five distinct deep-sea (3040–4908 m depth), moderately warm (14.0–16.5°C) biotopes, characterized by a wide range of salinities (39–348 practical salinity units), were investigated for this purpose. An enzyme from a ‘superficial’ marine hydrothermal habitat (65°C) was isolated and characterized for comparative purposes. We report here the first experimental evidence suggesting that in salt-saturated deep-sea habitats, the adaptation to high pressure is linked to high thermal resistance (P value = 0.0036). Salinity might therefore increase the temperature window for enzyme activity, and possibly microbial growth, in deep-sea habitats. As an example, Lake Medee, the largest hypersaline deep-sea anoxic lake of the Eastern Mediterranean Sea, where the water temperature is never higher than 16°C, was shown to contain halopiezophilic-like enzymes that are most active at 70°C and with denaturing temperatures of 71.4°C. The determination of the crystal structures of five proteins revealed unknown molecular mechanisms involved in protein adaptation to poly-extremes as well as distinct active site architectures and substrate preferences relative to other structurally characterized enzymes.
U2 - 10.1111/1462-2920.12660
DO - 10.1111/1462-2920.12660
M3 - Article
VL - 17
SP - 332
EP - 345
JO - Environmental Microbiology
JF - Environmental Microbiology
SN - 1462-2920
IS - 2
ER -