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• W2108767532 abstract "The expressions of chloroplast and mitochondria genes are tightly controlled by numerous nuclear-encoded proteins, mainly at the post-transcriptional level. Recent analyses have identified a large, plant-specific family of pentatricopeptide repeat (PPR) motif-containing proteins that are exclusively involved in RNA metabolism of organelle genes via sequence-specific RNA binding. A tandem array of PPR motifs within the protein is believed to facilitate the RNA interaction, although little is known of the mechanism. Here, we describe the RNA interacting framework of a PPR protein, Arabidopsis HCF152. First, we demonstrated that a Pfam model could be relevant to the PPR motif function. A series of proteins with two PPR motifs showed significant differences in their RNA binding affinities, indicating functional differences among PPR motifs. Mutagenesis and informatics analysis putatively identified five amino acids organizing its RNA binding surface [the 1st, 4th, 8th, 12th and ‘ii’(-2nd) amino acids] and their complex connections. SELEX (Systematic evolution of ligands by exponential enrichment) and nucleobase preference assays determined the nucleobases with high affinity for HCF152 and suggested several characteristic amino acids that may be involved in determining specificity and/or affinity of the PPR/RNA interaction." @default.
• W2108767532 created "2016-06-24" @default.
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• W2108767532 date "2011-11-29" @default.
• W2108767532 modified "2023-10-15" @default.
• W2108767532 title "Identification and characterization of the RNA binding surface of the pentatricopeptide repeat protein" @default.
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• W2108767532 doi "https://doi.org/10.1093/nar/gkr1084" @default.
• W2108767532 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3315335" @default.
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