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Genes Dev. 1995 Feb 1;9(3):304-16.

Regulation of human RPS14 transcription by intronic antisense RNAs and ribosomal protein S14.

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  • 1Division of Biology, Kansas State University, Manhattan 66506-4901.

Abstract

RNase protection studies reveal two stable RNAs (250 and 280 nucleotides) transcribed from the antisense strand of the human ribosomal protein gene RPS14's first intron. These transcripts, designated alpha-250 and alpha-280, map to overlapping segments of the intron's 5' sequence. Neither RNA encodes a polypeptide sequence, and both are expressed in all human cells and tissues examined. Although alpha-280 is detected among both the cells' nuclear and cytoplasmic RNAs, the great majority of alpha-250 is found in the cytoplasmic subcellular compartment. As judged by its resistance to high concentrations of alpha-amanitin, cell-free transcription of alpha-250 and alpha-280 appears to involve RNA polymerase I. Tissue culture transfection and cell-free transcription experiments demonstrate that alpha-250 and alpha-280 stimulate S14 mRNA transcription, whereas free ribosomal protein S14 inhibits it. Electrophoretic mobility shift experiments indicate specific binary molecular interactions between r-protein S14, its message and the antisense RNAs. In light of these data, we propose a model for fine regulation of human RPS14 transcription that involves RPS14 intron 1 antisense RNAs as positive effectors and S14 protein as a negative effector.

PMID:
7867928
[PubMed - indexed for MEDLINE]
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