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. 1977 Feb;129(2):874–879. doi: 10.1128/jb.129.2.874-879.1977

Control of morphogenesis in Arthrobacter crystallopoiets: effect of cyclic adenosine 3',5'-monophosphate.

R W Hamilton, E C Achberger, P E Kolenbrander
PMCID: PMC235024  PMID: 190210

Abstract

The intracellular levels of cyclic adenosine 3',5'-monophosphate (cyclic AMP) were measured at various intervals during growth and morphogenesis in Arthrobacter crystallopoietes. Cyclic AMP levels remained relatively constant throughout growth in spherical cells grown in glucose-based media. Immediately after inoculation of spheres from glucose- to succinate-containing media, a 30-fold increase in intracellular cyclic AMP was detected. This dramatic rise in cyclic AMP preceded the observed change in cellular morphology from spheres to rods. The cyclic AMP level in rod-shaped cells rapidly dropped to a relatively stable concentration during the exponential growth phase. At the onset of stationary phase and rod-to-sphere morphological transition, a second peak of cyclic AMP was observed. Neither of these two peaks was detectable in a morphogenetic mutant that grew only as spheres. The intracellular levels of cyclic AMP in this mutant remained constant throughout exponential growth and decreased slightly during stationary phase. Effects of exogenously added cyclic nucleotides and their derivatives to both parent and mutant cultures were investigated. The data presented indicate that dramatic changes in intracellular cyclic AMP levels occur just before the morphological transitions characteristic of the morphogenetic cycle in A. crystallopoietes. It is suggested that cyclic AMP is a contributing factor in the regulatory phenomenon associated with morphogenesis in this bacterium.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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