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- W2023169844 abstract "Among the three zinc finger-containing glycine-rich RNA-binding proteins, named AtRZ-1a, AtRZ-1b, and AtRZ-1c, in the Arabidopsis thaliana genome, AtRZ-1a has previously been shown to enhance cold and freezing tolerance in Arabidopsis. Here, we determined and compared the functional roles of AtRZ-1b and AtRZ-1c in Arabidopsis and Escherichia coli under cold stress conditions. AtRZ-1b, but not AtRZ-1c, successfully complemented the cold sensitivity of E. coli BX04 mutant cells lacking four cold shock proteins. Domain deletion and site-directed mutagenesis showed that the zinc finger motif of AtRZ-1b is important for its complementation ability, and that the truncated N- and C-terminal domains of AtRZ-1b and AtRZ-1c harbor the complementation ability. Despite an increase in transcript levels of AtRZ-1b and AtRZ-1c under cold stress, overexpression or loss-of-function mutations did not affect seed germination or seedling growth of Arabidopsis under cold stress conditions. AtRZ-1b and AtRZ-1c proteins, being localized to the nucleus, have been shown to bind non-specifically to RNA sequences in vitro, in comparison to AtRZ-1a that is localized to both the nucleus and the cytoplasm and binds preferentially to G- or U-rich RNA sequences. Taken together, these results demonstrate that the three AtRZ-1 family members showing different cellular localization and characteristic nucleic acid-binding property have a potential to contribute differently to the enhancement of cold tolerance in Arabidopsis and E. coli." @default.
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- W2023169844 date "2010-10-01" @default.
- W2023169844 modified "2023-10-17" @default.
- W2023169844 title "Comparative analysis of Arabidopsis zinc finger-containing glycine-rich RNA-binding proteins during cold adaptation" @default.
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- W2023169844 doi "https://doi.org/10.1016/j.plaphy.2010.08.013" @default.
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