title: Preliminary characterization of Yor180Cp: identification of a novel peroxisomal protein of saccharomyces cerevisiae involved in fatty acid metabolism.
abstract: Here we report the preliminary characterization of Yor180Cp, a novel peroxisomal protein involved in fatty acid metabolism in the yeast Saccharomyces cerevisiae. A computer-based screen identified Yor180Cp as a putative peroxisomal protein, and Yor180Cp targeted GFP to peroxisomes in a PEX8-dependent manner. Yor180Cp was also detected by mass spectrometric analysis of an HPLC-separated extract of yeast peroxisomal matrix proteins. YOR180C is upregulated during growth on oleic acid, and deletion of YOR180C from the yeast genome resulted in a mild but significant growth defect on oleic acid, indicating a role for Yor180Cp in fatty acid metabolism. In addition, we observed that yor180cDelta cells fail to efficiently import the enzyme Delta3,Delta2-enoyl-CoA isomerase (Eci1p) to peroxisomes. This result suggested that Yor180Cp might associate with Eci1p in vivo, and a Yor180Cp-Eci1p interaction was detected using the yeast two-hybrid system. Potential roles for Yor180Cp in peroxisomal fatty acid metabolism are discussed.
authors.affiliation: Department of Biological Chemistry, Department of Pediatrics, The Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, Maryland, 21205, USA.
authors.forename: B V
authors.initials: BV
authors.lastname: Geisbrecht
authors.forename: K
authors.initials: K
authors.lastname: Schulz
authors.forename: K
authors.initials: K
authors.lastname: Nau
authors.forename: M T
authors.initials: MT
authors.lastname: Geraghty
authors.forename: H
authors.initials: H
authors.lastname: Schulz
authors.forename: R
authors.initials: R
authors.lastname: Erdmann
authors.forename: S J
authors.initials: SJ
authors.lastname: Gould
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D019748:Carbon-Carbon Double Bond Isomerases / Q000378:metabolism; D002458:Cell Fractionation; D064006:Dodecenoyl-CoA Isomerase; D005227:Fatty Acids / Q000378:metabolism*; D013058:Mass Spectrometry; D008565:Membrane Proteins / Q000737:chemistry* / Q000235:genetics*; D008830:Microbodies / Q000378:metabolism*; D008969:Molecular Sequence Data; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D013997:Time Factors
chemical_list: D005227:Fatty Acids; D008565:Membrane Proteins; D029701:Saccharomyces cerevisiae Proteins; D019748:Carbon-Carbon Double Bond Isomerases; C120150:DCI1 protein, S cerevisiae; D064006:Dodecenoyl-CoA Isomerase