Function
Makes mgtA transcription sensitive to intracellular proline levels. At low levels of proline this proline-rich protein cannot be fully translated, and stem loop 'C' forms in the mgtA 5' UTR which permits transcription of the downstream mgtA gene. Osmotic shock induction (0.3 M NaCl) also depends on mgtL translation. The distance between the mtgL-translating ribosome and the nucleotides which form the downstream stem loop 'C' is critical for mgtL-mediated transcription of mgtA. Cotranscribed with mgtA.