In molecular biology, the SR1 RNA is a small RNA (sRNA) produced by species of Bacillus and closely related bacteria.
SR1 RNA is involved in the regulation of arginine catabolism.
SR1 RNA binds to complementary stretches of ahrC mRNA (also known as argR and inhibits translation.
[2][3] AhrC endodes an arginine repressor protein which represses synthesis of arginine biosynthetic enzymes and activates arginine catabolic enzymes via regulation of the rocABC and rocDEF operons.
[4][5][6] In addition to acting as a sRNA, SR1 also encodes a small peptide, SR1P.