M
Michael John
Researcher at Max Planck Society
Publications - 43
Citations - 2119
Michael John is an academic researcher from Max Planck Society. The author has contributed to research in topics: Rhizobium & Gene. The author has an hindex of 23, co-authored 43 publications receiving 2056 citations.
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Rhizobium NodB protein involved in nodulation signal synthesis is a chitooligosaccharide deacetylase
TL;DR: The data show that the NodB protein of Rhizobium meliloti deacetylates the nonreducing N-acetylglucosamine residue of chitooligosaccharides, which may be a necessary requirement for attachment of the fatty acyl chain in the pathway of Nod factor synthesis.
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Soybean ENOD40 encodes two peptides that bind to sucrose synthase
TL;DR: It is suggested that ENOD40 peptides are involved in the control of sucrose use in nitrogen-fixing nodules and are directly translated from polycistronic eukaryotic mRNA.
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Organization, structure and symbiotic function of rhizobium meliloti nodulation genes determining host specificity for alfalfa
Beatrix Horvath,Eva Kondorosi,Michael John,Jürgen Schmidt,I. Török,Zoltan Györgypal,Ilona Barabas,Ursula Wieneke,Jeff Schell,Adam Kondorosi +9 more
TL;DR: In R. meliloti, four nodulation genes determining plant host-range specificity and have been identified hsnABC and D, which determine plant-specific infection through root hairs: hsnD is required for host-specific root hair curling and nodule initiation while the hsn ABC genes control infection thread growth from the root hairs.
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Cell signalling by oligosaccharides
TL;DR: How cells perceive and transduce oligosaccharide signals is a central remaining question, and current research is aimed at providing the answer.
Journal ArticleDOI
Positive and negative control of nod gene expression in Rhizobium meliloti is required for optimal nodulation
Eva Kondorosi,Eva Kondorosi,Jenö Gyuris,Jürgen Schmidt,Michael John,Erno Duda,Beate Hoffmann,Jeff Schell,Adam Kondorosi,Adam Kondorosi,Adam Kondorosi +10 more
TL;DR: It is shown that expression of common nodulation genes in Rhizobium meliloti is under positive as well as negative control, and Mutants lacking the repressor exhibited delayed nodulation phenotype, indicating that fine tuning of nod gene expression is required for optimal nodulation of the plant host.