Specificity of Ustilago maydis killer proteins.
نویسندگان
چکیده
Bacteria and fungi were tested for sensitivity to Ustilago maydis killer strains carrying virus-like particles. Various species taxonomically related to U. maydis were sensitive.
منابع مشابه
The virally encoded killer proteins from Ustilago maydis
Several strains of Ustilago maydis, a causal agent of corn smut disease, exhibit a ‘killer’ phenotype that is due to persistent infection by double-stranded RNA Totiviruses. These viruses produce potent killer proteins that are secreted by the host. This is a rare example of virus/host symbiosis in that these viruses are dependent upon host survival and, to that end, produce antifungal proteins...
متن کاملProcessing and secretion of a virally encoded antifungal toxin in transgenic tobacco plants: evidence for a Kex2p pathway in plants.
Ustilago maydis is a fungal pathogen of maize. Some strains of U. maydis encode secreted polypeptide toxins capable of killing other susceptible strains of U. maydis. We show here that one of these toxins, the KP6 killer toxin, is synthesized by transgenic tobacco plants containing the viral toxin cDNA under the control of a cauliflower mosaic virus promoter. The two components of the KP6 toxin...
متن کاملKiller Phenomenon in USTILAGO MAYDIS: The Organization of the Viral Genome.
The double-stranded RNA content, the production of inactive killer protein, and the presence of virus-like particles were examined in induced nonkiller mutants and nonkiller progeny from a cross between a killer strain and a sensitive strain. A correlation between the loss of the 0.7 x 10(6) daltons dsRNA of the Ustilago maydis P6 virus and the lack of synthesis of the killer protein was establ...
متن کاملAn Ustilago maydis gene involved in H2O2 detoxification is required for virulence.
The fungus Ustilago maydis is a biotrophic pathogen of maize (Zea mays). In its genome we have identified an ortholog of YAP1 (for Yeast AP-1-like) from Saccharomyces cerevisae that regulates the oxidative stress response in this organism. yap1 mutants of U. maydis displayed higher sensitivity to H(2)O(2) than wild-type cells, and their virulence was significantly reduced. U. maydis yap1 could ...
متن کاملCharacterization of ApB73, a virulence factor important for colonization of Zea mays by the smut Ustilago maydis
The biotrophic fungus Ustilago maydis, the causal agent of corn smut disease, uses numerous small secreted effector proteins to suppress plant defence responses and reshape the host metabolism. However, the role of specific effectors remains poorly understood. Here, we describe the identification of ApB73 (Apathogenic in B73), an as yet uncharacterized protein essential for the successful colon...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Applied microbiology
دوره 30 4 شماره
صفحات -
تاریخ انتشار 1975