Abstract
Transfer RNA (tRNA) is an essential link between the genetic code and proteins. During the process of translation, tRNA is charged with its cognate amino acid and delivers it to the ribosome, thus serving as a substrate of protein synthesis. To analyze the charging state of a particular tRNA, total RNA is purified and analyzed on an acid-urea gel. Separated RNA is then transferred to a membrane and detected with a probe for the tRNA of interest. Here, we present an improved protocol to analyze the tRNA charging state in the α-proteobacterium Rhodopseudomonas palustris. Compared to the classical method, the RNA isolation step is optimized to suit this organism. Additionally, a non-radioactive platform is used for electrophoresis and Northern blots. This significantly reduces the time and the effort required for this protocol.
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