Suppression of the microRNA pathway by bacterial effector proteins.
Suppression of the microRNA pathway by bacterial effector proteins.
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DOI:
10.1126/science.1159505
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发表时间:
2008-08-15
期刊:
影响因子:
--
通讯作者:
Voinnet O
中科院分区:
文献类型:
--
作者:
Navarro L;Jay F;Nomura K;He SY;Voinnet O
Plants and animals sense pathogen-associated molecular patterns (PAMPs) and in turn differentially regulate a subset of microRNAs (miRNAs). However, the extent to which the miRNA pathway contributes to innate immunity remains unknown. Here, we show that miRNA-deficient mutants of Arabidopsis partly restore growth of a type-three secretion-defective mutant of Pseudomonas syringae. These mutants also sustained growth of non-pathogenic Pseudomonas fluorescens and Escherichia coli strains, implicating miRNAs as key components of plant basal defense. Accordingly, we have identified P. syringae effectors that suppress transcriptional activation of some PAMP-responsive miRNAs, miRNA biogenesis, stability or activity. These results provide compelling evidence that, like viruses, bacteria have evolved to suppress RNA silencing to cause disease.
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