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. 1988 Dec;85(23):9133-7.
doi: 10.1073/pnas.85.23.9133.

Synthesis of an opine-like compound, a rhizopine, in alfalfa nodules is symbiotically regulated

P J Murphy  1 , N Heycke, S P Trenz, P Ratet, F J de Bruijn, J Schell
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Synthesis of an opine-like compound, a rhizopine, in alfalfa nodules is symbiotically regulated

P J Murphy et al. Proc Natl Acad Sci U S A. 1988 Dec.

Abstract

We show that the promoter of the mos locus, which encodes genes required for the synthesis of a nodule-specific, opine-like compound, a rhizopine, in alfalfa nodules is regulated by the symbiotic nitrogen-fixation regulatory gene nifA. The 5'-regulatory region and amino-terminal end of the first open reading frame of the mos locus are highly homologous to the 5'-regulatory region and amino-terminal portion of the Rhizobium meliloti nifH gene. The coordinate regulation of mos and nif genes suggests that the mos locus plays a symbiotic role. We propose that the rhizopine enhances the survival of the bacterial partner in the symbiosis.

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