What is "riboregulator"

n. (context biology genetics English) An RNA that regulates expression of itself or another nucleic acid in response to a signaling event.

In molecular biology, a riboregulator is a ribonucleic acid ( RNA) that responds to a signal nucleic acid molecule by Watson-Crick base pairing. A riboregulator may respond to a signal molecule in any number of manners including, translation (or repression of translation) of the RNA into a protein, activation of a ribozyme, release of silencing RNA ( siRNA), conformational change, and/or binding other nucleic acids. Riboregulators contain two canonical domains, a sensor domain and an effector domain. These domains are also found on riboswitches, but unlike riboswitches, the sensor domain only binds complementary RNA or DNA strands as opposed to small molecules. Because binding is based on base-pairing, a riboregulator can be tailored to differentiate and respond to individual genetic sequences and combinations thereof.