Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9121423 | FEMS Microbiology Letters | 2005 | 6 Pages |
Abstract
The npgA1 mutation causes defects in the outer layer of the cell wall resulting in a colorless colony. In this study, a temperature-sensitive suppressor of npgA1 named snpA was isolated by UV mutagenesis. The suppressing mutant showed pleiotropic phenotypes in cellular structure and developmental processes when incubated at a temperature of 37 °C or above. At 37 °C, multiple germ tubes emerged from germinating conidia. Moreover, at 42 °C conidia germination was delayed more than 12 h and hyphal growth was strongly inhibited. The suppressor allele, snpA6, is recessive and maps to the linkage group III. A gene complementing the mutation was identified employing the chromosome III-specific cosmid library. Sequencing analysis revealed that the snpA gene encodes the eukaryotic polypeptide release factor, eRF1. The snpA6 allele contains a G-A mutation resulting in SnpAE117K, which may allow read-through of the nonsense mutation in the npgA1 allele in a similar manner to the yeast omni-potent suppressor SUP45 and SUP35.
Keywords
Related Topics
Life Sciences
Biochemistry, Genetics and Molecular Biology
Genetics
Authors
Kap-Hoon Han, Jee Hyun Kim, Won-Sin Kim, Dong-Min Han,