Abstract:
PROBLEM TO BE SOLVED: To obtain a new protein capable of carrying out the riboflavin biosynthesis by using a gene of an enzyme for the biosysnthesis of purine from Ashbya gossipii having a specific polypeptide sequence and the enzyme activity of a phosphoribosyl pyrophosphate synthase. SOLUTION: This new protein has a polypeptide sequence represented by the formula or a polypeptide sequence obtained by substituting, inserting or deleting up to 15% amino acids from the formula and the enzyme activity of a phosphoribosyl pyrophosphate synthase and is capable of carrying out the biosynthesis of riboflavin (vitamin B2 ) by expressing a gene from an enzyme for biosynthesis of purine from Ashbya gossipii in a microorganism. The protein is obtained by extracting a genomic DNA from Ashbya gossipii ATCC10895, then producing a genomic genetic bank according to a conventional method, cloning the resultant bank, providing a gene of an enzyme for the biosynthesis of the purine and expressing the resultant gene in the microorganism according to a gene technical constitution of the microorganism. The prepared protein is used to perform the biosynthesis of the riboflavin in the microorganism.
Abstract:
The invention relates to a genetic method for producing riboflavin. The production of riboflavin in organisms is increased by specially selecting genes of the riboflavin biosynthesis or of the combination thereof in organisms, especially in bacteria, fungi, yeasts and plants, and of the expression thereof. The invention also relates to a nucleic acid fragment containing genes with the sequences SEQ ID No. 1, SEQ ID No. 3 or SEQ ID No. 5 or the functional equivalents thereof, to expression vectors containing the nucleic acid fragments, and to organisms containing at least one nucleic acid fragment or at least one vector.
Abstract:
A gene is disclosed which contains the nucleotide sequence represented by SE ID NO:1 and which extends from nucleotide 671 to nucleotide 6295, or a nucleotide sequence derived therefrom by substitution, insertion or deletion of up to 30 %, 20 %, 10 % or 5 % of its nucleotides, the lower percentages being preferable, and whose genetic product exhibits the enzymatic activity of an adenylate cyclase. Also disclosed is its use.
Abstract:
The present invention relates to the terminal sequencing of random genomic fragments performed with the filamentous fungus A.gossypii, to the sequences obtained therewith and the use of the sequences for forensic identification, to characterize genes and gene organization of this ascomycete by inter-genomic comparison, to identify biosynthetic genes that can be used as selection markers, to isolate promotors and terminators for application in a homologous as well as heterologous context, to find putative centromere containing clones, chromosome mapping, chromosome identifying, general information about chromosome organization and in addition to identify ORF containing SRS sequences with no homology to S. cerevisiae or any other organism which allows the identification of A. gossypii specific genes.
Abstract:
In the microbial prodn. of riboflavin (Rf) by growing a Rf-producing microorganism in a nutrient medium, the new feature is that the endogenous isocitrate lyase (ICL) activity of the microorganism has been altered. Also new are: (1) ICL gene encoding the 560 residue amino acid sequence (I), given in the specification; and (2) genetic construct contg. the ICL gene.
Abstract:
PCT No. PCT/EP94/03706 Sec. 371 Date May 16, 1996 Sec. 102(e) Date May 16, 1996 PCT Filed Nov. 10, 1994 PCT Pub. No. WO95/14095 PCT Pub. Date May 26, 1995The invention relates to endothelin-converting enzymes containing the polypeptide sequence described in SEQ. ID. NO. 30 or SEQ. ID. NO. 36 or functional fragments thereof, genes which code for such enzymes, and processes for producing the said enzymes and the use thereof.