Publications by authors named "Takahiro Tsukui"
We report the complete genome sequence of USDA 122, a nitrogen-fixing soybean symbiont. The genome consists of a 9.1 Mb circular chromosome, and 8,551 coding sequences (CDSs) were predicted on the genome.
View Article and Find Full Text PDFMotivation: Ustiloxins A and B are toxic cyclic tetrapeptides, Tyr-Val/Ala-Ile-Gly (Y-V/A-I-G), that were originally identified from Ustilaginoidea virens, a pathogenic fungus affecting rice plants. Contrary to our report that ustiloxin B is ribosomally synthesized in Aspergillus flavus, a recent report suggested that ustiloxins are synthesized by a non-ribosomal peptide synthetase in U.virens.
View Article and Find Full Text PDFThe rhcJ and ttsI mutants of Bradyrhizobium japonicum USDA122 for the type III protein secretion system (T3SS) failed to secrete typical effector proteins and gained the ability to nodulate Rj2 soybean plants (Hardee), which are symbiotically incompatible with wild-type USDA122. This suggests that effectors secreted via the T3SS trigger incompatibility between these two partners.
View Article and Find Full Text PDFArticle Synopsis
- Bradyrhizobium sp. S23321 is a bacterium from paddy field soil that is closely related to the legume symbiont Bradyrhizobium japonicum USDA110 but does not induce root nodulation in siratro.
- Its genome consists of a single circular chromosome with over 6,800 protein-encoding genes, but lacks the symbiosis islands and chaperonin gene cluster crucial for nodulation present in USDA110.
- S23321 possesses a nitrogen fixation (nif) gene cluster similar to that of photosynthetic bradyrhizobia, alongside genes for a complete photosynthetic system and various transporters, suggesting its adaptability to low-nutrient environments.