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. 1977 Sep;131(3):906–916. doi: 10.1128/jb.131.3.906-916.1977

Peptide transport in yeast: utilization of leucine- and lysine-containing peptides by Saccharomyces cerevisiae.

R Marder, J M Becker, F Naider
PMCID: PMC235548  PMID: 330503

Abstract

A variety of leucine-containing di- and tripeptides and two lysine-containing dipeptides supported the growth of strain Z1-2D, a leucine, lysine auxotroph of Saccharomyces cerevisiae. However, (Lys)2, (Lys)3, (Lys)4, and (Lys)5 as well as Gly-Leu-Gly, three tetra- and one pentapeptide containing leucine were not utilized by the mutant. Cellular peptidases released leucine or lysine from all of these non-growth-supporting peptides, suggesting that the failure of strain Z1-2D to utilize these compounds reflects their failure to enter the yeast. Competition studies employing phenylalanine or non-leucine-containing peptides showed that the uptake of peptides into S. cerevisiae Z1-2D is distinct from that of amino acids and that di- and oligopeptides may share a common transport system. The failure of strain Z1-2D to utilize any peptide larger than (Leu)3 may indicate a transport size limit. Such a size limit would influence the construction of models that explain the action of yeast mating factors.

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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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