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Characterization of a genomic and cDNA clone coding for the thioesterase domain and 3' noncoding region of the chicken liver fatty acid synthase gene.

Abstract：

:The fatty acid synthase (FAS) of animal tissue is a dimer of two identical subunits, each with a Mr of 260,000. The subunit is a single multifunctional protein having seven catalytic activities and a site for binding of the prosthetic group 4'-phosphopantetheine. The mRNA coding for the subunit has an estimated size of 10-16 kb, which is about twice the number of nucleotides needed to code for the estimated 2300 amino acids. We have isolated a positive clone, lambda CFAS, containing FAS gene sequences by screening a chicken genomic library with a segment of a 3' untranslated region of goose fatty acid synthase cDNA clone, pGFAS3, as a hybridization probe. The DNA insert in lambda CFAS hybridizes with synthetic oligonucleotide probes prepared according to the known amino acid sequence of the thioesterase component of the chicken liver fatty acid synthase [Yang, C.-Y., Huang, W.-Y., Chirala, S., & Wakil, S.J. (1988) Biochemistry (preceding paper in this issue)]. Further characterization of the DNA insert shows that the lambda CFAS clone contains about a 4.7-kbp segment from the 3' end of the chicken FAS gene that codes for a portion of the thioesterase domain. Complete sequence analyses of this segment including S1 nuclease mapping, showed that the lambda CFAS clone contains the entire 3' untranslated region of the chicken FAS gene and three exons that code for 162 amino acids of the thioesterase domain from the COOH-terminal end of the fatty acid synthase. Using the exon region of the genomic clone, we were able to isolate a cDNA clone that codes for the entire thioesterase domain of chicken liver fatty acid synthase.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Biochemistry

journal_title

Biochemistry

authors

Kasturi R,Chirala S,Pazirandeh M,Wakil SJ

doi

10.1021/bi00420a029

subject

Has Abstract

pub_date

1988-10-04 00:00:00

pages

7778-85

issue

20

eissn

0006-2960

issn

1520-4995

journal_volume

27

pub_type

杂志文章

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