Disruption of the Aspergillus niger argB gene: a tool for transformation.
We disrupted the Aspergillus niger gene argB, encoding ornithine transcarbamylase. Full characterisation of the argB deletion was performed by Southern blot analysis, growth tests and by means of mitotic recombination, complementation and transformation. The argB locus was found to be physically removed, thus creating an auxotrophic mutation. The latter can be supplemented by addition of arginine into the culture medium. The argB gene and its disruption do not correlate to the argI13 (formerly argB13) allele described. The delta argB is on chromosome I whereas argI13 is on V. In addition, the argI13 mutation can only be complemented by the A. nidulans argB gene, whereas the new argB deletion can be complemented by both the A. niger and A. nidulans argB genes. The delta argB strain has been used to generate several strains in a breeding programme and to study the expression of important genes, such as areA and kexB.
Lenouvel
François
F
Molecular Genetics of Industrial Micro-Organisms, Wageningen Agricultural University, Dreijenlaan 2, 6703 HA Wageningen, The Netherlands. francois.lenouvel@ujf-grenoble.fr
van de Vondervoort
Peter J I
PJ
Visser
Jaap
J
D000595:Amino Acid Sequence; D001120:Arginine / Q000096:biosynthesis / Q000235:genetics*; D001234:Aspergillus niger / Q000235:genetics* / Q000502:physiology; D015139:Blotting, Southern; D015825:Chromosomes, Fungal; D017353:Gene Deletion; D005800:Genes, Fungal; D005816:Genetic Complementation Test; D008969:Molecular Sequence Data; D009154:Mutation; D009954:Ornithine Carbamoyltransferase / Q000235:genetics* / Q000502:physiology; D010957:Plasmids; D011995:Recombination, Genetic; D017386:Sequence Homology, Amino Acid
D001120:Arginine; D009954:Ornithine Carbamoyltransferase