Isolation of Mutant Saccharomyces Cerevisiae Strains That Survive Without Sphingolipids

Overview

Journal Mol Cell Biol

Specialty Cell Biology

Date 1990 May 1

PMID 2183021

Citations 21

Authors

R C Dickson

G B Wells

A Schmidt

R L Lester

Affiliations

Soon will be listed here.

Abstract

Sphingolipids comprise a large, widespread family of complex eucaryotic-membrane constituents of poorly defined function. The yeast Saccharomyces cerevisiae is particularly suited for studies of sphingolipid function because it contains a small number of sphingolipids and is amenable to molecular genetic analysis. Moreover, it is the only eucaryote in which mutants blocked in sphingolipid biosynthesis have been isolated. Beginning with a nonreverting sphingolipid-defective strain that requires the addition of the long-chain-base component of sphingolipids to the culture medium for growth, we isolated two strains carrying secondary, suppressor mutations that permit survival in the absence of exogenous long-chain base. Remarkably, the suppressor strains made little if any sphingolipid. A study of how the suppressor gene products compensate for the lack of sphingolipids may reveal the function(s) of these membrane lipids in yeast cells.

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