title: Characterization of messenger RNA for fructose 1,6-bisphosphate aldolase A isozyme of rat ascites hepatoma AH 7974 cells.
abstract: The messenger activity for fructose 1,6-bisphosphate aldolase (EC4.1.2.13) (aldolase) A isozyme has been characterized in the polysome- or the messenger RNA-directed, protein-synthesizing system using the pH 5 fraction of rat liver or wheat germ extracts, respectively. The subunit of aldolase A synthesized in vitro was detected by immunoprecipitation with anti-aldolase A antibody raised in chickens followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The synthesis of the enzyme depended on the addition of polysomes or polyadenylate-containing RNA of rat ascites hepatoma AH 7974 cells which show a complete shift of aldolase isozyme to type A, whereas polysomes of adult rat liver were inactive. The messenger activity for aldolase A was present exclusively on free polysomes but absent on membrane-bound polysomes and in the soluble supernatant fraction of AH 7974 cells. The size of aldolase A messenger RNA determined by formamide-containing sucrose density gradient centrifugation was approximately 5.8 X 10(5) daltons corresponding to 1650 nucleotides. Taking into account the number of amino acid residues in the aldolase A subunit, approximately 400 nucleotides correspond to the noncoding region of aldolase A messenger RNA.
mesh_terms: D000818:Animals; D003593:Cytoplasm / Q000378:metabolism; D005634:Fructose-Bisphosphate Aldolase / Q000096:biosynthesis*; D066298:In Vitro Techniques; D007527:Isoenzymes / Q000096:biosynthesis*; D008099:Liver / Q000378:metabolism; D008114:Liver Neoplasms, Experimental / Q000378:metabolism*; D008297:Male; D008970:Molecular Weight; D011132:Polyribosomes / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism*; D012334:RNA, Neoplasm / Q000378:metabolism*; D051381:Rats; D012261:Ribonucleoproteins / Q000378:metabolism
chemical_list: D007527:Isoenzymes; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D012261:Ribonucleoproteins; D005634:Fructose-Bisphosphate Aldolase