Figure 4:

SR1 gene is encoded between pdhD and speA. Its transcription is repressed by CcpA and CcpN under glycolytic conditions. The 205 nucleotide sRNA expressed under gluconeogenic conditions and in presence of L-arginine also encodes a small 39 aa protein SR1P (blue). The ORF and the base-pairing region overlap on this sRNA. In the presence of arginine, SR1 represses translation of the ahrC mRNA, the transcriptional activator of two arginine catabolic operons rocABC and rocDEF. The small protein SR1P plays a role in gluconeogenic conditions by binding to GapA and stabilizing the gapA operon mRNA from degradation by an unknown mechanism. It also binds RNase J1 and enhances its activity. Thus, the activities of the small protein and base pairing RNA affect different pathways.