ArticleProtein science : a publication of the Protein Society2012
Structural basis of RNA binding by leucine zipper GCN4.
Article in Protein science : a publication of the Protein Society, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 6 citations in OpenAlex.
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Authors and funding
2 authors at 1 institution in 2 countries.
Funding
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Abstract
Recently, we showed that leucine zipper (LZ) motifs of basic leucine zipper (bZIP) transcription factors GCN4 and c-Jun are capable of catalyzing degradation of RNA (Nikolaev et al., PLoS ONE 2010; 5:e10765). This observation is intriguing given the tight regulation of RNA turnover control and the antiquity of bZIP transcription factors. To support further mechanistic studies, herein, we elucidated RNA binding interface of the GCN4 leucine zipper motif from yeast. Solution NMR experiments showed that the LZ-RNA interaction interface is located in the first two heptads of LZ moiety, and that only the dimeric (coiled coil) LZ conformation is capable of binding RNA. Site-directed mutagenesis of the LZ-GCN4 RNA binding interface showed that substrate binding is facilitated by lysine and arginine side chains, and that at least one nucleophilic residue is located in proximity to the RNA phosphate backbone. Further studies in the context of full-length bZIP factors are envisaged to address the biological relevance of LZ RNase activity.
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