Reference: Brandriss MC and Magasanik B (1981) Subcellular compartmentation in control of converging pathways for proline and arginine metabolism in Saccharomyces cerevisiae. J Bacteriol 145(3):1359-64

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Abstract


Enzymes of proline biosynthesis and proline degradation which act on the same compound, delta 1-pyrroline-5-carboxylate, are physically separated in yeast cells. The enzyme responsible for the final step in proline biosynthesis, pyrroline-5-carboxylate reductase, converts pyrroline-5-carboxylate to proline and is located in the cytoplasm. The last enzyme in the proline degradative pathway, pyrroline-5-carboxylate dehydrogenase, converts pyrroline-5-carboxylate to glutamate and is found in the particulate fraction of the cell, presumably in the mitochondrion. By subcellular compartmentation, yeast cells avoid futile cycling between proline and pyrroline-5-carboxylate.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, Non-P.H.S. | Research Support, U.S. Gov't, P.H.S.
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Brandriss MC, Magasanik B
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