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The rabbit muscle phosphofructokinase gene. Implications for protein structure, function, and tissue specificity.

C P Lee, M C Kao, B A French

    The Journal of Biological Chemistry
    |March 25, 1987
    PubMed
    Summary

    Researchers sequenced the first eukaryotic phosphofructokinase gene from rabbits. This 17 kb gene contains 22 exons and reveals evolutionary insights into this essential metabolic enzyme.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Evolutionary Biology

    Background:

    • Sequence homologies suggest mammalian phosphofructokinase (PFK) evolved from prokaryotic genes via duplication.
    • Previous studies indicated gene duplication and divergence in PFK evolution.

    Purpose of the Study:

    • To isolate and determine the nucleotide sequence of the rabbit muscle phosphofructokinase gene.
    • To provide the first complete sequence of a eukaryotic PFK gene.

    Main Methods:

    • Gene isolation and nucleotide sequencing of exons and introns.
    • Sequence analysis of the cloned 17 kilobase pair rabbit PFK gene.

    Main Results:

    • The first eukaryotic phosphofructokinase gene sequence was determined.

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  • The gene comprises 22 exons coding for 780 amino acids, with high G/C content at the third codon position.
  • Introns are primarily located between or near secondary structural elements, not symmetrically in duplicated halves.

    • Conclusions:

    • The study provides the complete gene sequence for rabbit muscle phosphofructokinase.
    • Intron-exon structure offers further clues into the gene's evolutionary history and protein structure.