Yeast acyl-CoA-binding protein: acyl-CoA-binding affinity and effect on intracellular acyl-CoA pool size
Research output: Contribution to journal › Journal article › Research › peer-review
Acyl-CoA-binding protein (ACBP) is a 10 kDa protein characterized in vertebrates. We have isolated two ACBP homologues from the yeast Saccharomyces carlsbergensis, named yeast ACBP types 1 and 2. Both proteins contain 86 amino acid residues and are identical except for four conservative substitutions. In comparison with human ACBP, yeast ACBPs exhibit 48% (type 1) and 49% (type 2) conservation of amino acid residues. The amino acid sequence of S. carlsbergensis ACBP type 1 was found to be identical with the one ACBP present in Saccharomyces cerevisiae. A recombinant form of this protein was expressed in Escherichia coli and S. cerevisiae, purified, and its acyl-CoA-binding properties were characterized by isoelectric focusing and microcalorimetric analyses. The yeast ACBP was found to bind acyl-CoA esters with high affinity (Kd 0.55 x 10(-10) M). Overexpression of yeast ACBP in S. cerevisiae resulted in a significant expansion of the intracellular acyl-CoA pool. Finally, Southern-blotting analysis of the two genes encoding ACBP types 1 and 2 in S. carlsbergensis strongly indicated that this species is a hybrid between S. cerevisiae and Saccharomyces monacensis.
|Volume||302 ( Pt 2)|
|Number of pages||6|
|Publication status||Published - 1994|
Keywords: Acyl Coenzyme A; Amino Acid Sequence; Base Sequence; Blotting, Southern; Calorimetry; Carrier Proteins; Diazepam Binding Inhibitor; Electron Spin Resonance Spectroscopy; Electrophoresis, Polyacrylamide Gel; Escherichia coli; Genes, Fungal; Genome, Fungal; Humans; Isoelectric Point; Mass Spectrometry; Molecular Sequence Data; Recombinant Proteins; Saccharomyces; Saccharomyces cerevisiae; Sequence Alignment