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• W2082800491 abstract "The fatty acid transport protein Fat1p functions as a component of the long-chain fatty acid transport apparatus in the yeast Saccharomyces cerevisiae. Fat1p has significant homologies to the mammalian fatty acid transport proteins (FATP) and the very long-chain acyl-CoA synthetases (VLACS). In order to further understand the functional roles intrinsic to Fat1p (fatty acid transport and VLACS activities), a series of 16 alleles carrying site-directed mutations within FAT1 were constructed and analyzed. Sites chosen for the construction of amino acid substitutions were based on conservation between Fat1p and the mammalian FATP orthologues and included the ATP/AMP and FATP/VLACS signature motifs. Centromeric and 2 mu plasmids encoding mutant forms of Fat1p were transformed into a yeast strain containing a deletion in FAT1 (fat1Delta). For selected subsets of FAT1 mutant alleles, we observed differences between the wild type and mutants in 1) growth rates when fatty acid synthase was inhibited with 45 microm cerulenin in the presence of 100 microm oleate (C(18:1)), 2) levels of fatty acid import monitored using the accumulation of the fluorescent fatty acid 4,4-difluoro-5-methyl-4-bora-3a,4a-diaza-S-indacene-3-dodecanoic acid and [(3)H]oleate, 3) levels of lignoceryl (C(24:0)) CoA synthetase activities, and 4) fatty acid profiles monitored using gas chromatography/mass spectrometry. In most cases, there was a correlation between growth on fatty acid/cerulenin plates, the levels of fatty acid accumulation, very long-chain fatty acyl-CoA synthetase activities, and the fatty acid profiles in the different FAT1 mutants. For several notable exceptions, the fatty acid transport and very long-chain fatty acyl-CoA synthetase activities were distinguishable. The characterization of these novel mutants provides a platform to more completely understand the role of Fat1p in the linkage between fatty acid import and activation to CoA thioesters." @default.
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• W2082800491 date "2002-08-01" @default.
• W2082800491 modified "2023-10-17" @default.
• W2082800491 title "Fatty Acid Transport in Saccharomyces cerevisiae" @default.
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• W2082800491 doi "https://doi.org/10.1074/jbc.m205034200" @default.
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