Functional analysis of a vacuolar ABC transporter in wild-type Candida albicans reveals its involvement in virulence

Stephanie Theiss, Marianne Kretschmar, Thomas Nichterlein, Herbert Hof, Nina Agabian, Jörg Hacker, Gerwald Koehler

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

ATP-driven transport proteins belonging to the ATP-binding cassette (ABC) superfamily perform important functions in cell metabolism and detoxification. Compounds can be actively transported across membranes, including the plasma membrane or organellar membranes. The vacuole is an important organelle in fungal cells required for compartmentalization of metabolites as well as toxic substances. Sequestration into the vacuole is often energy-dependent. We present the first isolation and molecular analysis of a vacuolar ABC transporter gene in the opportunistic fungal pathogen Candida albicans. The protein encoded by the MLT1 gene is highly similar to Multiple Drug Resistance-associated Protein (MRP)-like transporters of yeast and higher organisms that form the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR)/MRP subfamily of ABC transporters, a class of proteins so far not characterized in C. albicans. MLT1 expression is extensively growth phase-regulated, and gene transcripts are inducible by metabolic poisons. Gene replacement mutants generated in wild-type C. albicans with the dominant selection marker MPAR showed a profound reduction in virulence in a mouse peritonitis model that was reversed by complementation with an intact MLT1 gene. Hence, this report provides primary evidence for the involvement of vacuolar ABC transporters in fungal virulence.

Original languageEnglish
Pages (from-to)571-584
Number of pages14
JournalMolecular Microbiology
Volume43
Issue number3
DOIs
StatePublished - 17 Jun 2002

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ATP-Binding Cassette Transporters
Candida albicans
Virulence
Genes
Poisons
Multiple Drug Resistance
Vacuoles
Proteins
Organism Forms
Adenosine Triphosphate
Cystic Fibrosis Transmembrane Conductance Regulator
Membranes
Peritonitis
Organelles
Carrier Proteins
Yeasts
Cell Membrane
Growth

Cite this

Theiss, Stephanie ; Kretschmar, Marianne ; Nichterlein, Thomas ; Hof, Herbert ; Agabian, Nina ; Hacker, Jörg ; Koehler, Gerwald. / Functional analysis of a vacuolar ABC transporter in wild-type Candida albicans reveals its involvement in virulence. In: Molecular Microbiology. 2002 ; Vol. 43, No. 3. pp. 571-584.
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Functional analysis of a vacuolar ABC transporter in wild-type Candida albicans reveals its involvement in virulence. / Theiss, Stephanie; Kretschmar, Marianne; Nichterlein, Thomas; Hof, Herbert; Agabian, Nina; Hacker, Jörg; Koehler, Gerwald.

In: Molecular Microbiology, Vol. 43, No. 3, 17.06.2002, p. 571-584.

Research output: Contribution to journalArticle

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