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Metabolism of [14C]bicarbonate by Streptococcus lactis: the synthesis, uptake and excretion of aspartate by resting cells

Published online by Cambridge University Press:  01 June 2009

Alan J. Hillier
Affiliation:
Russell Grimwade School of Biochemistry, University of Melbourne, Parkville, Victoria 3052, Australia
Garry H. Rice
Affiliation:
Russell Grimwade School of Biochemistry, University of Melbourne, Parkville, Victoria 3052, Australia
G. Richard Jago
Affiliation:
Dairy Research Laboratory, Division of Food Research, CSIRO, Highett, Victoria 3190, Australia

Summary

Resting cells of Streptococcus lactis C10 were able to synthesize aspartic acid de novo but could not actively transport aspartic acid into the cell. Intracellular aspartate was excreted from the cell in the presence of glucose but did not exchange with any extracellular amino acids. The results indicated that Str. lactis C10 obtains the aspartic acid it requires for growth by bicarbonate fixation instead of by the utilization of extracellular aspartic acid.

Type
Original Articles
Copyright
Copyright © Proprietors of Journal of Dairy Research 1978

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References

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