AsponA is a small asRNA transcribed antisense to the penicillin-binding protein 1A gene called "ponA." It was identified by RNAseq and the expression was validated by 5' and 3' RACE experiments in "Pseudomanas aeruginosa". "AsponA" expression was up or down regulated under different antibiotic stress. Owing to its location it may be able to prevent the transcription or translation of the opposite gene. Study by Wurtzel "et al." and Ferrara "et al." also detected its expression.
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