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Different mRNAs code for dopa decarboxylase in tissues of neuronal and nonneuronal origin. 1991

M Krieger, and F Coge, and F Gros, and J Thibault
Laboratoire de Biochimie Cellulaire, Collège de France, Paris.

A cDNA clone for dopa decarboxylase (EC 4.1.1.28) has been isolated from a rat pheochromocytoma cDNA library and the cDNA sequence has been determined. It corresponds to an mRNA of 2094 nucleotides. The length of the mRNA was measured by primer-extension of rat pheochromocytoma RNA and the 5' end of the sequence of the mRNA was confirmed by the PCR. A probe spanning the translation initiation site of the mRNA was used to hybridize with mRNAs from various organs of the rat. S1 nuclease digestion of the mRNAs annealed with this probe revealed two classes of mRNAs. The comparison of the cDNA sequence and published sequences for rat liver, human pheochromocytoma, and Drosophila dopa decarboxylase supported the conclusion that two mRNAs are produced: one is specific for tissue of neuronal origin and the other is specific for tissues of nonneuronal (mesodermal or endodermal) origin. The neuronal mRNA contains a 5' untranslated sequence that is highly conserved between human and rat pheochromocytoma including a GA stretch. The coding sequence and the 3' untranslated sequence of mRNAs from rat liver and pheochromocytoma are identical. The rat mRNA differs only in the 5' untranslated region. Thus a unique gene codes for dopa decarboxylase and this gene gives rise to at least two transcripts presumably in response to different signals during development.

UI MeSH Term Description Entries
D007668 Kidney Body organ that filters blood for the secretion of URINE and that regulates ion concentrations. Kidneys
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
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D009928 Organ Specificity Characteristic restricted to a particular organ of the body, such as a cell type, metabolic response or expression of a particular protein or antigen. Tissue Specificity,Organ Specificities,Specificities, Organ,Specificities, Tissue,Specificity, Organ,Specificity, Tissue,Tissue Specificities
D010673 Pheochromocytoma A usually benign, well-encapsulated, lobular, vascular tumor of chromaffin tissue of the ADRENAL MEDULLA or sympathetic paraganglia. The cardinal symptom, reflecting the increased secretion of EPINEPHRINE and NOREPINEPHRINE, is HYPERTENSION, which may be persistent or intermittent. During severe attacks, there may be HEADACHE; SWEATING, palpitation, apprehension, TREMOR; PALLOR or FLUSHING of the face, NAUSEA and VOMITING, pain in the CHEST and ABDOMEN, and paresthesias of the extremities. The incidence of malignancy is as low as 5% but the pathologic distinction between benign and malignant pheochromocytomas is not clear. (Dorland, 27th ed; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1298) Pheochromocytoma, Extra-Adrenal,Extra-Adrenal Pheochromocytoma,Extra-Adrenal Pheochromocytomas,Pheochromocytoma, Extra Adrenal,Pheochromocytomas,Pheochromocytomas, Extra-Adrenal
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D001921 Brain The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM. Encephalon
D004296 Dopa Decarboxylase One of the AROMATIC-L-AMINO-ACID DECARBOXYLASES, this enzyme is responsible for the conversion of DOPA to DOPAMINE. It is of clinical importance in the treatment of Parkinson's disease. Decarboxylase, Dopa
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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