Document Detail


A new physiological role for Pdr12p in Saccharomyces cerevisiae: export of aromatic and branched-chain organic acids produced in amino acid catabolism.
MedLine Citation:
PMID:  16911515     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Saccharomyces cerevisiae can use a broad range of compounds as sole nitrogen source. Many amino acids, such as leucine, tyrosine, phenylalanine and methionine, are utilized through the Ehrlich pathway. The fusel acids and alcohols produced from this pathway, along with their derived esters, are important contributors to beer and wine flavor. It is unknown how these compounds are exported from the cell. Analysis of nitrogen-source-dependent transcript profiles via microarray analysis of glucose-limited, aerobic chemostat cultures revealed a common upregulation of PDR12 in cultures grown with leucine, methionine or phenylalanine as sole nitrogen source. PDR12 encodes an ABC transporter involved in weak-organic-acid resistance, which has hitherto been studied in the context of resistance to exogenous organic acids. The hypothesis that PDR12 is involved in export of natural products of amino acid catabolism was evaluated by analyzing the phenotype of null mutants in PDR12 or in WAR1, its positive transcriptional regulator. The hypersensitivity of the pdr12Delta and war1Delta strains for some of these compounds indicates that Pdr12p is involved in export of the fusel acids, but not the fusel alcohols derived from leucine, isoleucine, valine, phenylalanine and tryptophan.
Authors:
Lucie A Hazelwood; Siew Leng Tai; Viktor M Boer; Johannes H de Winde; Jack T Pronk; Jean Marc Daran
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  FEMS yeast research     Volume:  6     ISSN:  1567-1356     ISO Abbreviation:  FEMS Yeast Res.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-08-16     Completed Date:  2006-11-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101085384     Medline TA:  FEMS Yeast Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  937-45     Citation Subset:  IM    
Affiliation:
Department of Biotechnology, Industrial Microbiology Section, Delft University of Technology, Delft, The Netherlands.
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MeSH Terms
Descriptor/Qualifier:
ATP-Binding Cassette Transporters / genetics,  physiology*
Amino Acids / metabolism*
Carboxylic Acids / metabolism*
Gene Deletion
Gene Expression Profiling
Membrane Transport Proteins / physiology*
Oligonucleotide Array Sequence Analysis
Saccharomyces cerevisiae / genetics,  metabolism*
Saccharomyces cerevisiae Proteins / genetics,  physiology*
Transcription Factors / genetics
Chemical
Reg. No./Substance:
0/ATP-Binding Cassette Transporters; 0/Amino Acids; 0/Carboxylic Acids; 0/Membrane Transport Proteins; 0/Pdr12 protein, S cerevisiae; 0/Saccharomyces cerevisiae Proteins; 0/Transcription Factors; 0/War1 protein, S cerevisiae

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