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- W970885736 abstract "Nitric oxide (NO) production increases in the cold stress. This cold enhanced NO manifests its effect either by regulating the gene expression or by modulating proteins by NO based post-translational modifications (PTMs) including S-nitrosylation. CBF (C-repeat binding factor) dependent cold stress signaling is most studied cold stress-signaling pathway in plants. SNP (sodium nitroprusside, a NO donor) treatment to tomato seedlings showed four fold induction of LeCBF1 (a cold inducible CBF) transcript in cold stress. S-nitrosylation as PTM of CBF has not been analyzed till date. In silico analysis using GPS-SNO 1.0 software predicted Cys 68 as the probable site for nitrosylation in LeCBF1. The 3D structure and motif prediction showed it to be present in the beta hairpin loop and hence available for S-nitrosylation. LeCBF1 was cloned and expressed in Escherichia coli. LeCBF1 accumulated in the inclusion bodies, which were solubilized under denaturing conditions and purified after on column refolding by Ni-NTA His tag affinity chromatography. Purified LeCBF1 resolved as a 34 kDa spot with a slightly basic pI (8.3) on a 2-D gel. MALDI-TOF mass spectrometry identified it as LeCBF1 and western blotting using anti-LeCBF1 antibodies confirmed its purification. Biotin switch assay and neutravidin affinity chromatography showed LeCBF1 to be S-nitrosylated in presence of GSNO (NO donor) as well as endogenously (without donor) in cold stress treated tomato seedlings. Dual regulation of LeCBF1 by NO at both transcriptional as well as post-translational level (by S-nitrosylation) is shown for the first time." @default.
- W970885736 created "2016-06-24" @default.
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- W970885736 date "2015-11-01" @default.
- W970885736 modified "2023-09-27" @default.
- W970885736 title "Nitric oxide modulates Lycopersicon esculentum C-repeat binding factor 1 (LeCBF1) transcriptionally as well as post-translationally by nitrosylation" @default.
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- W970885736 doi "https://doi.org/10.1016/j.plaphy.2015.07.032" @default.
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