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Isolation and molecular analysis of the orotidine-5'-phosphate decarboxylase gene (pyrG) of Phycomyces blakesleeanus. 1990

J M Díaz-Mínguez, and E A Iturriaga, and E P Benito, and L M Corrochano, and A P Eslava
Departamento de Microbiología, Genética, Medicina Preventiva y Salud Pública, Facultad de Biología, Universidad de Salamanca, Spain.

The pyrG gene of Phycomyces was isolated from a Phycomyces genomic library, constructed in the cosmid pHS255, by hybridization with a 170 bp fragment of the pyrG gene of Aspergillus niger. This fragment includes a consensus sequence found in almost all species in which the orotidine-5'-phosphate decarboxylase (OMPdecase) gene has been sequenced. The complete nucleotide sequence of the cloned pyrG gene from Phycomyces was determined and the transcription start sites mapped. In the predicted amino acid sequence there are regions of strong homology to the equivalent genes of Saccharomyces cerevisiae, A. niger, Schizophyllum commune and Homo sapiens. Analysis of the sequence revealed the presence of two introns. The precise length and location of these introns was determined by sequencing the pyrG cDNA and comparing it with the genomic clone. Non-coding flanking regions showed obvious homology to the consensus TATA and CAAT boxes, and the polyadenylation signal "AATAAA". The pyrG gene is the second Phycomyces gene that has been cloned and analysed. This is the first time that introns have been reported in Phycomyces.

UI MeSH Term Description Entries
D007438 Introns Sequences of DNA in the genes that are located between the EXONS. They are transcribed along with the exons but are removed from the primary gene transcript by RNA SPLICING to leave mature RNA. Some introns code for separate genes. Intervening Sequences,Sequences, Intervening,Intervening Sequence,Intron,Sequence, Intervening
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
D009964 Orotidine-5'-Phosphate Decarboxylase Orotidine-5'-phosphate carboxy-lyase. Catalyzes the decarboxylation of orotidylic acid to yield uridylic acid in the final step of the pyrimidine nucleotide biosynthesis pathway. EC 4.1.1.23. Orotidine Phosphate Carboxy-Lyase,Orotidylate Decarboxylase,OMP Decarboxylase,Orotidine 5 Phosphate Decarboxylase,Orotidine 5' Phosphate Decarboxylase,Orotidine-5-Phosphate Decarboxylase,Carboxy-Lyase, Orotidine Phosphate,Decarboxylase, OMP,Decarboxylase, Orotidine-5'-Phosphate,Decarboxylase, Orotidine-5-Phosphate,Decarboxylase, Orotidylate,Orotidine Phosphate Carboxy Lyase,Phosphate Carboxy-Lyase, Orotidine
D010800 Phycomyces A genus of zygomycetous fungi in the family Mucoraceae, order MUCORALES, forming mycelia having a metallic sheen. It has been used for research on phototropism. Phycomyce
D003062 Codon A set of three nucleotides in a protein coding sequence that specifies individual amino acids or a termination signal (CODON, TERMINATOR). Most codons are universal, but some organisms do not produce the transfer RNAs (RNA, TRANSFER) complementary to all codons. These codons are referred to as unassigned codons (CODONS, NONSENSE). Codon, Sense,Sense Codon,Codons,Codons, Sense,Sense Codons
D004271 DNA, Fungal Deoxyribonucleic acid that makes up the genetic material of fungi. Fungal DNA
D005658 Fungi A kingdom of eukaryotic, heterotrophic organisms that live parasitically as saprobes, including MUSHROOMS; YEASTS; smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi, commonly known as molds, refer to those that grow as multicellular colonies. Fungi, Filamentous,Molds,Filamentous Fungi,Filamentous Fungus,Fungus,Fungus, Filamentous,Mold
D005800 Genes, Fungal The functional hereditary units of FUNGI. Fungal Genes,Fungal Gene,Gene, Fungal
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein

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