Abstract
In this study, we report isolation of a phosphatase gene designated GhHL1 from cotton and its functional characterization. GhHL1 transcripts were detected in all cotton tissues examined. Southern blotting analysis indicated that it exists in multiple-copies. Biochemical analysis showed that GhHL1 was Mg2+-dependent and cation-sensitive. Purified recombinant GhHL1 protein dephosphorylated both 3′,5′-bisphosphate nucleotide and inositol 1,4-bisphosphate, demonstrating dual 3′,5′-bisphosphate nucleotidase and inositol polyphosphate 1-phosphatase activities. Overexpression of GhHL1 complemented yeast hal2 mutant and enhanced yeast growth under elevated NaCl or LiCl, showing a role in salt tolerance associated with ionic stress response. Taken together, these results show that GhHL1 is a functional and good candidate gene, which might be used to improve salt tolerance in plants.
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Abbreviations
- FDD-PCR:
-
fluorescence differential display-polymerase chain reaction
- IP2:
-
inositol 1,4-bisphosphate
- IP3:
-
inositol 1,4,5-trisphosphate
- IPP1ase:
-
inositol polyphosphate 1-phosphatase
- PAP:
-
3′(2′),5′-bisphosphate nucleotide
- PAPase:
-
3′(2′),5′-bisphosphate nucleotidase
- PAPS:
-
3′(2′),5′-bisphosphate nucleotide sulfate
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Published in Russian in Biokhimiya, 2010, Vol. 75, No. 1, pp. 105–116.
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Lu, SY., Zhao, GR., Wu, AM. et al. Molecular cloning of a cotton phosphatase gene and its functional characterization. Biochemistry Moscow 75, 85–94 (2010). https://doi.org/10.1134/S0006297910010116
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DOI: https://doi.org/10.1134/S0006297910010116