Amino acid sequences of pyridoxal 5'-phosphate binding sites and fluorescence resonance energy transfer in chicken liver fatty acid synthase.
Journal Article (Journal Article)
The amino acid sequences associated with pyridoxal 5'-phosphate binding sites in chicken liver fatty acid synthase have been determined: a site whose modification causes selective inhibition of the enoyl reductase activity and a site (site I) that is not associated with enzymatic activity. The amino acid sequences of peptides obtained by trypsin hydrolysis of the pyridoxamine 5'-phosphate labeled enzyme were determined. For the site associated with enoyl reductase activity, the sequence similarities between chicken and goose are extensive and include the sequence Ser-X-X-Lys, a characteristic structural feature of pyridoxamine enzymes. In addition, the spatial relationships between the pyridoxal 5'-phosphate binding sites and reductase site(s) have been studied with fluorescence resonance energy-transfer techniques. The distances between site I and the enoyl reductase and beta-ketoacyl reductase sites are greater than 50 and 41-44 A, respectively. The distance between the two reductase sites is greater than 49 A.
- Chang, SI; Hammes, GG
- May 2, 1989
Volume / Issue
- 28 / 9
Start / End Page
- 3781 - 3788
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)
- United States