Chemical genomic profiling for identifying intracellular targets of toxicants producing Parkinson's disease.
The yeast deletion collection includes approximately 4700 strains deleted for both copies of every nonessential gene. This collection is a powerful resource for identifying the cellular pathways that functionally interact with drugs. In the present study, the complete pool of approximately 4700 barcoded homozygous deletion strains of Saccharomyces cerevisiae were surveyed to identify genes/pathways interacting with 1-methyl-4-phenylpyridinium (MPP(+)) and N,N-dimethyl-4-4-bipiridinium (paraquat), neurotoxicants that can produce Parkinson's disease. Each yeast mutant is molecularly "barcoded" the collections can be grown competitively and ranked for sensitivity by microarray hybridization. Analysis data from these screens allowed us to determine that the multivesicular body pathway is an important element of toxicity induced by both MPP(+) and paraquat. When yeast genes that when deleted showed sensitivity to MPP(+) and paraquat toxicity were analyzed for their homology to human genes, 80% were found to have highly conserved human homologs (with e < 10(-8)). Future work will address if these human genes may also functionally interact with MPP(+) and paraquat toxicity.
Doostzadeh
Julie
J
The Parkinson's Institute, Sunnyvale, California 94087, USA. jdoostzadeh@thepi.org
Davis
Ronald W
RW
Giaever
Guri N
GN
Nislow
Corey
C
Langston
James W
JW
D015655:1-Methyl-4-phenylpyridinium / Q000633:toxicity*; D016000:Cluster Analysis; D017353:Gene Deletion; D020869:Gene Expression Profiling; D015966:Gene Expression Regulation, Fungal / Q000187:drug effects*; D015894:Genome, Human; D006801:Humans; D007306:Insecticides / Q000633:toxicity*; D020411:Oligonucleotide Array Sequence Analysis; D010269:Paraquat / Q000633:toxicity*; D010302:Parkinson Disease, Secondary / Q000139:chemically induced* / Q000235:genetics / Q000378:metabolism; D046988:Proteasome Endopeptidase Complex / Q000187:drug effects / Q000235:genetics; D011506:Proteins / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D012689:Sequence Homology, Nucleic Acid; D025801:Ubiquitin / Q000378:metabolism
D007306:Insecticides; D011506:Proteins; D025801:Ubiquitin; D046988:Proteasome Endopeptidase Complex; D010269:Paraquat; D015655:1-Methyl-4-phenylpyridinium