title: ATP citrate lyase in the glaucocystophyte alga Cyanophora paradoxa is a cytosolic enzyme: characterisation of the gene for the large subunit at the cDNA and genomic levels.
abstract: The single-copy gene for the large subunit of ATP citrate lyase (ACL) from the alga Cyanophora paradoxa was characterized at the cDNA and genome levels. The gene product showed high sequence similarity to its mammalian counterparts, but is smaller in size, as is also found for the fungal subunit Acl1 and, most probably, for the corresponding subunit from Arabidopsis thaliana. The C. paradoxa gene is interrupted by at least 12 introns of 53-65 bp with conserved border and branchpoint sequences, and the product lacks a stroma-targeting peptide. Enzyme activity was found in the cytosol of C. paradoxa but not in the plastid (cyanelle) fraction. This is in contrast to the subcellular distribution of ATP citrate lyases in higher plants, where both chloroplast and cytosolic enzymes have been reported.
authors.affiliation: Institut für Biochemie und Molekulare Zellbiologie der Universität Wien and Ludwig-Boltzmann-Forschungsstelle für Biochemie, Vienna, Austria.
authors.forename: Y
authors.initials: Y
authors.lastname: Ma
authors.forename: J
authors.initials: J
authors.lastname: Jakowitsch
authors.forename: T L
authors.initials: TL
authors.lastname: Maier
authors.forename: M G
authors.initials: MG
authors.lastname: Bayer
authors.forename: N E
authors.initials: NE
authors.lastname: Müller
authors.forename: H E
authors.initials: HE
authors.lastname: Schenk
authors.forename: W
authors.initials: W
authors.lastname: Löffelhardt
mesh_terms: D001275:ATP Citrate (pro-S)-Lyase / Q000235:genetics* / Q000378:metabolism; D000595:Amino Acid Sequence; D003600:Cytosol / Q000201:enzymology; D004247:DNA / Q000737:chemistry / Q000235:genetics; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D056890:Eukaryota / Q000201:enzymology / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D021122:Protein Subunits; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D021122:Protein Subunits; D004247:DNA; D001275:ATP Citrate (pro-S)-Lyase