Literature DB >> 10725385

Arabidopsis RelA/SpoT homologs implicate (p)ppGpp in plant signaling.

E A van der Biezen1, J Sun, M J Coleman, M J Bibb, J D Jones.   

Abstract

Arabidopsis RPP5 is a member of a large class of pathogen resistance genes encoding nucleotide-binding sites and leucine-rich repeat domains. Yeast two-hybrid analysis showed that RPP5 specifically interacts with At-RSH1, an Arabidopsis RelA/SpoT homolog. In Escherichia coli, RelA and SpoT determine the level of guanosine tetraphosphate (ppGpp) and guanosine pentaphosphate (pppGpp), which are the effector nucleotides of the bacterial stringent response. Functional analysis in E. coli and in Streptomyces coelicolor A3 (2) showed that At-RSH1 confers phenotypes associated with (p)ppGpp synthesis. We characterized two additional Arabidopsis RelA/SpoT homologs, At-RSH2 and At-RSH3. At-RSH genes may regulate a rapid plant (p)ppGpp-mediated response to pathogens and other stresses.

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Year:  2000        PMID： 10725385      PMCID： PMC16311          DOI： 10.1073/pnas.97.7.3747

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN： 0027-8424            Impact factor:   11.205


  31 in total

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Journal:  J Biol Chem       Date:  1991-03-25       Impact factor: 5.157

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Authors:  R Chakraburtty; M Bibb
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  54 in total

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7.  The wheat homolog of putative nucleotide-binding site-leucine-rich repeat resistance gene TaRGA contributes to resistance against powdery mildew.

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8.  Guanosine tetra- and pentaphosphate synthase activity in chloroplasts of a higher plant: association with 70S ribosomes and inhibition by tetracycline.

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