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ksgA | Dimethyladenosine 16S ribosomal RNA transferase; Specifically dimethylates two adjacent adenosines (A1518 and A1519) in the loop of a conserved hairpin near the 3'-end of 16S rRNA in the 30S particle. May play a critical role in biogenesis of 30S subunits; Belongs to the class I-like SAM-binding methyltransferase superfamily. rRNA adenine N(6)-methyltransferase family. RsmA subfamily. (292 aa) | ||||
hag | Flagellin protein; Flagellin is the subunit which polymerizes to form the filaments of bacterial flagella. Assembly into flagella requires FliW. Acts as a homeostatic autoinhibitory regulator to control its own cytoplasmic levels. Partner switching by flagellin between FliW and CsrA provides a flagellar assembly checkpoint to tightly control the timing of flagellin synthesis. Flagellin binds to assembly factor FliW, freeing translation regulator CsrA to repress translation of the flagellin mRNA. When the flagellar hook is assembled flagellin is secreted, depleting intracellular flagell [...] (304 aa) | ||||
csrA | Carbon storage regulator; A translational regulator that binds mRNA to regulate translation initiation and/or mRNA stability. Usually binds in the 5'- UTR at or near the Shine-Dalgarno sequence preventing ribosome-binding, thus repressing translation. Represses expression of flagellin (hag) in a post-transcriptional fashion. Specifically binds to 2 sites in the 5'-UTR of hag mRNA in a cooperative fashion; the second site overlaps the Shine-Dalgarno sequence and prevents 30S ribosomal subunit binding. Mutation of either binding site abolishes CsrA regulation of hag expression. Repressio [...] (74 aa) | ||||
fliW | Assembly factor of the flagellum; Acts as an anti-CsrA protein, binds CsrA and prevents it from repressing translation of its target genes, one of which is flagellin. Binds to flagellin (hag), which is implicated in polymerization, and participates in the assembly of the flagellum. An antagonist to translational regulator CsrA, it binds CsrA at an allosteric site and non-competitively inhibits CsrA binding to hag RNA. Partner switching by flagellin between FliW and CsrA provides a flagellar assembly checkpoint to tightly control the timing of flagellin synthesis. Flagellin binds to ass [...] (143 aa) |