Inactivation of a single-2A phosphoprotein phosphatase is lethal in Neurospora crassa.
A PCR approach, employing the use of degenerate oligonucleotide mixtures, was used to isolate pph-1, a type-2A protein phosphatase (catalytic subunit)-encoding gene, from Neurospora crassa. The isolated single copy gene is 1327 nucleotides in length, contains four putative introns and encodes a 310 amino-acid polypeptide. pph-1 is located between pdx-1 and col-4 on the right arm of N.crassa linkage group IV. pph-1 transcript levels are highest during the first hours of conidial germination. Failure to obtain viable progeny in which pph-1 had been inactivated via the repeat-induced point (RIP) mutation process, and evidence that nuclei harboring a disrupted pph-1 gene could only be maintained in a heterokaryon, indicated that a functional pph-1 gene is essential for fungal growth. This is the first report providing evidence that inactivation of a single-type-2A protein phosphatase gene results in a lethal phenotype in fungi.
Yatzkan
E
E
Department of Plant Pathology and Microbiology, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel.
Yarden
O
O
D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D004274:DNA, Recombinant; D015971:Gene Expression Regulation, Enzymologic; D015966:Gene Expression Regulation, Fungal; D005804:Genes, Lethal; D008969:Molecular Sequence Data; D009492:Neurospora crassa / Q000187:drug effects / Q000235:genetics / Q000254:growth & development*; D010749:Phosphoprotein Phosphatases / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D017386:Sequence Homology, Amino Acid
D004274:DNA, Recombinant; D010749:Phosphoprotein Phosphatases