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- W4365786564 abstract "The potato pathogenesis-related gene PR-10a is transcriptionally activated in response to pathogen infection or elicitor treatment. Characterization of the cis-acting elements of the PR-10a promoter revealed the presence of a silencing element between residues −52 and −27 that contributes to transcriptional regulation. In this study, we have isolated a silencing element binding factor (SEBF) from potato tuber nuclei that binds to the coding strand of the silencing element in a sequence-specific manner. The consensus binding site of SEBF, PyTGTCNC, is present in a number of PR genes and shows striking similarity to the auxin response element. Mutational analysis of the PR-10a promoter revealed an inverse correlation between the in vitro binding of SEBF and the expression of PR-10a. SEBF was purified to homogeneity from potato tubers, and sequencing of the N terminus of the protein led to the isolation of a cDNA clone. Sequence analysis revealed that SEBF is homologous with chloroplast RNA binding proteins that possess consensus sequence–type RNA binding domains characteristic of heterogenous nuclear ribonucleoproteins (hnRNPs). Overexpression of SEBF in protoplasts repressed the activity of a PR-10a reporter construct in a silencing element–dependent manner, confirming the role of SEBF as a transcriptional repressor." @default.
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- W4365786564 date "2003-04-01" @default.
- W4365786564 modified "2023-10-10" @default.
- W4365786564 title "A Diterpene as an Endogenous Signal for the Activation of Defense Responses to Infection with <i>Tobacco mosaic virus</i> and Wounding in Tobacco" @default.
- W4365786564 doi "https://doi.org/10.1105/tpc.010231" @default.
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