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  • Title: Molecular cloning and sequencing of a cDNA encoding the thioesterase domain of the rat fatty acid synthetase.
    Author: Naggert J, Witkowski A, Mikkelsen J, Smith S.
    Journal: J Biol Chem; 1988 Jan 25; 263(3):1146-50. PubMed ID: 2891707.
    Abstract:
    A cloned cDNA containing the entire coding sequence for the long-chain S-acyl fatty acid synthetase thioester hydrolase (thioesterase I) component as well as the 3'-noncoding region of the fatty acid synthetase has been isolated using an expression vector and domain-specific antibodies. The coding region was assigned to the thioesterase I domain by identification of sequences coding for characterized peptide fragments, amino-terminal analysis of the isolated thioesterase I domain and the presence of the serine esterase active-site sequence motif. The thioesterase I domain is 306 amino acids long with a calculated molecular mass of 33,476 daltons; its DNA is flanked at the 5'-end by a region coding for the acyl carrier protein domain and at the 3'-end by a 1,537-base pairs-long noncoding sequence with a poly(A) tail. The thioesterase I domain exhibits a low, albeit discernible, homology with the discrete medium-chain S-acyl fatty acid synthetase thioester hydrolases (thioesterase II) from rat mammary gland and duck uropygial gland, suggesting a distant but common evolutionary ancestry for these proteins.
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