Abstract
Partial sequences of P-type ATPases were cloned from the marine microalgae Dunaliella maritima, two putative H+-ATPases (DmHA1 and DmHA2) and two putative Ca2+-ATPases (DmCA1 and DmCA2). The probable functions of the cloned proteins were suggested on the basis of their primary structure similarity with the proteins whose functions have been already characterized. The transcriptional response of the cloned D. maritima ATPase genes to a sharp increase in the NaCl concentration in the culture medium (from 100 to 500 mM) was investigated by quantitative RT-PCR. Hyperosmotic salt shock led to a significant increase in the DmHA2 expression and to a slight increase in the DmCA2 expression, whereas the expression of the two other ATPases, DmHA1 and DmCA1, was decreased. These data indicate that the DmHA2 ATPase is involved in maintenance of ion homeostasis in D. maritima cells under hyperosmotic salt shock.
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This work was supported by the Russian Foundation for Basic Research (project no. 16-04-01544).
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Khramov, D.E., Matalin, D.A., Karpichev, I.V. et al. Expression of P-Type ATPases of Marine Green Microalga Dunaliella maritima under Hyperosmotic Salt Shock. Dokl Biochem Biophys 488, 327–331 (2019). https://doi.org/10.1134/S1607672919050119
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DOI: https://doi.org/10.1134/S1607672919050119