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MsiK RNA motif
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MsiK RNA motif : ウィキペディア英語版
MsiK RNA motif

The ''msiK'' RNA motif describes a conserved RNA structure discovered using bioinformatics. The RNA is always found in the presumed 5' untranslated regions of genes annotated as ''msiK'', and is therefore hypothesized to be an RNA-based cis-regulatory element that regulates these genes.
MsiK, the protein encoded by ''msiK'' genes, is the ATPase subunit within certain ABC-type membrane transporter proteins. MsiK is thought to allow the import of multiple kinds of complex sugars. Based on analysis of various experimental reports, it was suggested that ''msiK'' RNAs are probably not involved in sensing glucose themselves, but are more likely a part of a feedback inhibition process to regulate levels of the MsiK protein.〔
The ''msi'' RNA motif is a hairpin with a conserved 11-nucleotide bulge (see secondary structure), as shown in the diagram. A Shine-Dalgarno sequence (predicted ribosome-binding site) overlaps a part of the ''msiK'' RNA. If ''msiK'' RNAs are ''cis''-regulatory elements, they likely function by sequestering the ribosome-binding site, thus preventing gene translation.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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