Characterization of cyclophilin-encoding genes in Phytophthora
| Autor: | Adrienne R. Hardham, Leila M. Blackman, Weixing Shan, Pamela Hui Peng Gan |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Phytophthora
Phytophthora infestans Biology Plant disease resistance Cyclophilins Gene expression Genetics Gene family Molecular Biology Gene Cyclophilin Phylogeny Plant Diseases Expressed Sequence Tags Effector fungi Algal Proteins food and beverages Computational Biology General Medicine biology.organism_classification Protein Structure Tertiary Multigene Family |
| Zdroj: | Molecular genetics and genomics : MGG. 281(5) |
| ISSN: | 1617-4623 |
| Popis: | Recent research has shown that cyclophilins, proteins that catalyze the isomerization of peptidyl-prolyl bonds, play a variety of important roles in infection, including facilitating host penetration and colonization and activating pathogen effector proteins within the host cytoplasm. In the current study, bioinformatic analysis of the genomes of three species of plant pathogens in the genus Phytophthora has revealed extensive synteny between the 20 or 21 members of the cyclophilin gene family. In P. infestans, extensive EST studies give evidence of the expression of 14 of the 21 genes. Sequences homologous to 12 of the 14 expressed P. infestans cyclophilins were isolated using PCR and gene-specific primers in the broad host range pathogen, P. nicotianae. Quantitative real-time PCR measurements of transcript levels in P. nicotianae at four stages of asexual development and during infection of resistant and susceptible tobacco plants gave evidence of expression of seven of the P. nicotianae homologs. The most abundantly expressed gene, PnCyPA, has a lower mRNA level in zoospores compared to other stages of asexual development and its expression increases during infection of susceptible plants. Immunocytochemical studies indicate that PnCyPA occurs in the nucleus and cytoplasm of P. nicotianae cells and is secreted from germinated cysts. |
| Databáze: | OpenAIRE |
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