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Cell-free translation and thyroxine induction of carbamyl phosphate synthetase I messenger RNA in tadpole liver. 1979

M Mori, and S M Morris, and P P Cohen

Total RNA of tadpole and frog (Rana catesbeiana) liver was isolated by either 7 or 8 M guanidine . HCl extraction and translated in a cell-free protein-synthesizing system derived from rabbit reticulocytes. The identity of carbamyl phosphate synthetase I[carbamoyl-phosphate synthase (ammonia); ATP:carbamate phosphotransferase (dephosphorylating), EC 2.7.2.5] synthesized in vitro with the purified enzyme was established as follows: (i) immunoprecipitation by a specific antibody; (i) comigration with purified carrier enzyme on sodium dodecyl sulfate/polyacrylamide gel electrophoresis; (iii) copurification with carrier enzyme by affinity chromatography on Cibacron Blue F3GA-coupled agarose; and (iv) formation of identical proteolytic cleavage products. Inclusion of protease inhibitors in the system resulted in no apparent change in the polypeptide molecular weight. These results indicate that carbamyl phosphate synthetase I is synthesized as a polypeptide that is indistinguishable from the mature enzyme by the analytical methods used and that it is not grossly modified during its transport into mitochondria. The level of translatable mRNA for carbamyl phosphate synthetase-I in tadpole liver was increased about 2-fold 1 day after thyroxine treatment and did not change significantly through 4 subsequent days of treatment. Thus the thyroxine-induced synthesis of carbamyl phosphate synthetase I in tadpole liver is at least partly due to an increase of translatable mRNA for this enzyme.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D010770 Phosphotransferases A rather large group of enzymes comprising not only those transferring phosphate but also diphosphate, nucleotidyl residues, and others. These have also been subdivided according to the acceptor group. (From Enzyme Nomenclature, 1992) EC 2.7. Kinases,Phosphotransferase,Phosphotransferases, ATP,Transphosphorylase,Transphosphorylases,Kinase,ATP Phosphotransferases
D011892 Rana catesbeiana A species of the family Ranidae (true frogs). The only anuran properly referred to by the common name "bullfrog", it is the largest native anuran in North America. Bullfrog,Bullfrogs,Rana catesbeianas,catesbeiana, Rana
D002222 Carbamoyl-Phosphate Synthase (Ammonia) An enzyme that catalyzes the formation of carbamoyl phosphate from ATP, carbon dioxide, and ammonia. This enzyme is specific for arginine biosynthesis or the urea cycle. Absence or lack of this enzyme may cause CARBAMOYL-PHOSPHATE SYNTHASE I DEFICIENCY DISEASE. EC 6.3.4.16. Carbamoyl Phosphate Synthetase I,CP Synthase I,Carbamoyl-Phosphate Synthetase (Ammonia),Carbamoyl-Phosphate Synthetase I,Carbamoylphosphate Synthetase I,Carbamyl Phosphate Synthase (Ammonia),Carbamyl-Phosphate Synthase (Ammonia),Synthase I, CP,Synthetase I, Carbamoyl-Phosphate,Synthetase I, Carbamoylphosphate
D002474 Cell-Free System A fractionated cell extract that maintains a biological function. A subcellular fraction isolated by ultracentrifugation or other separation techniques must first be isolated so that a process can be studied free from all of the complex side reactions that occur in a cell. The cell-free system is therefore widely used in cell biology. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p166) Cellfree System,Cell Free System,Cell-Free Systems,Cellfree Systems,System, Cell-Free,System, Cellfree,Systems, Cell-Free,Systems, Cellfree
D004792 Enzyme Precursors Physiologically inactive substances that can be converted to active enzymes. Enzyme Precursor,Proenzyme,Proenzymes,Zymogen,Zymogens,Precursor, Enzyme,Precursors, Enzyme
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001001 Anura An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae. Bombina,Frogs and Toads,Salientia,Toad, Fire-Bellied,Toads and Frogs,Anuras,Fire-Bellied Toad,Fire-Bellied Toads,Salientias,Toad, Fire Bellied,Toads, Fire-Bellied
D012313 RNA A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information, serve as an abundant structural component of cells, and also possesses catalytic activity. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed) RNA, Non-Polyadenylated,Ribonucleic Acid,Gene Products, RNA,Non-Polyadenylated RNA,Acid, Ribonucleic,Non Polyadenylated RNA,RNA Gene Products,RNA, Non Polyadenylated
D012333 RNA, Messenger RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm. Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated

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