The N Terminus of Bacterial Elongation Factor Tu Elicits Innate Immunity in Arabidopsis Plants
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ID: 301029
2004
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Abstract
Innate immunity is based on the recognition of pathogen-associated molecular patterns (PAMPs). Here, we show that elongation factor Tu (EF-Tu), the most abundant bacterial protein, acts as a PAMP in Arabidopsis thaliana and other Brassicaceae. EF-Tu is highly conserved in all bacteria and is known to be N-acetylated in Escherichia coli. Arabidopsis plants specifically recognize the N terminus of the protein, and an N-acetylated peptide comprising the first 18 amino acids, termed elf18, is fully active as inducer of defense responses. The shorter peptide, elf12, comprising the acetyl group and the first 12 N-terminal amino acids, is inactive as elicitor but acts as a specific antagonist for EF-Tu–related elicitors. In leaves of Arabidopsis plants, elf18 induces an oxidative burst and biosynthesis of ethylene, and it triggers resistance to subsequent infection with pathogenic bacteria.
| Reference Key |
openalex_W2172027477
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| Authors | Gernot Kunze, Cyril Zipfel, Silke Robatzek, Karsten Niehaus, Thomas Boller, Georg Felix |
| Journal | The Plant cell |
| Year | 2004 |
| DOI |
10.1105/tpc.104.026765
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| URL | |
| Keywords | Keywords not found |
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