Here is a very recent publication in J. Bact.  The authors show that Shewanella oneidensis MR-1 has two adenylate cyclases that are essential to anaerobic respiraiton in Shewanella.  These are the same cya’s as shown in the arsenate respiring Shewanella, strain ANA-3.  The authors also report on transcriptome analysis of crp and adenylate cyclase mutants.  This is a solid paper with interesting results.  Here is the Pubmed link:

Charania et al. 2009. Involvement of a membrane-bound class III adenylate cyclase in the regulation of anaerobic respiration in Shewanella oneidensis MR-1 J. Bacteriology, Apr 24. Epub ahead of print.