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Figure 7 | BMC Microbiology

Figure 7

From: The mxd operon in Shewanella oneidensis MR-1 is induced in response to starvation and regulated by ArcS/ArcA and BarA/UvrY

Figure 7

Summary: Mxd regulation in S. oneidensis MR-1. Summary of mxd regulation in S. oneidensis MR-1 under planktonic (left cartoon) and biofilm (right cartoon) conditions. Under planktonic conditions starvation and more specifically carbon starvation was identified to transcriptionally induce expression of the mxd operon. The ArcS/ArcA TCS was found to act as a minor repressor of the mxd genes under planktonic conditions. The TCS BarA/UvrY was identified to induce mxd gene expression under planktonic growth conditions. Under biofilm conditions, the ArcS/ArcA TCS activates mxd gene expression which is contrary to the findings under planktonic conditions. The TCS BarA/UvrY was found to act as a minor inducer of biofilm formation (solid arrow) and it remains to be determined if it acts via the mxd operon (dashed arrow).

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