Phosphoglycerate mutase in developing forespores of Bacillus megaterium may be regulated by the intrasporal level of free manganous ion. |
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Authors: | R P Singh P Setlow |
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Institution: | Department of Biochemistry University of Connecticut Health Center Farmington, Connecticut 06032 USA |
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Abstract: | When young intact forespores of Bacillus megaterium were incubated with either Mn++ or the ionophore X-537A, the pool of 3-phosphoglyceric acid (3-PGA) was stable. However, incubation of forespores with Mn++ plus the ionophore X-537A resulted in rapid and complete utilization of the 3-PGA. This effect was not seen with Ca++ or Mg++, and was also not observed with older forespores or fresh dormant spores. Since the phosphoglycerate mutase of has an absolute and specific requirement for Mn++, it is possible that phosphoglycerate mutase in developing forespores may be inactive because of a low intrasporal level of free Mn++. |
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