Proteome profiling of Rhodobacter capsulatus wild type and a ΔmodABC mutant in response to molybdenum

The diazotrophic bacterium Rhodobacter capsulatus is able to synthesize two nitrogenases, a molybdenum-dependent and an alternative Mo-free iron-only nitrogenase, enabling growth with molecular dinitrogen (N2) as sole nitrogen source. The Mo response of the wild type and a mutant lacking the high-affinity molybdate transporter, ModABC, were analyzed by proteome profiling.