Transcriptional Regulation: Riboswitches
Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...
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Nigeria made progress in polio eradication efforts, improving vaccination quality and reducing cases, but challenges like insecurity and vaccine sentiment persist. Continued improvements are crucial for interrupting wild poliovirus transmission in 2014.
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Riboswitches: Non-coding mRNA Domains
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.<br />The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...