The Genome of Azorhizobium caulinodans ORS571
Author Information
Author(s): Lee Kyung-Bum, De Backer Philippe, Aono Toshihiro, Liu Chi-Te, Suzuki Shino, Suzuki Tadahiro, Kaneko Takakazu, Yamada Manabu, Tabata Satoshi, Kupfer Doris M, Najar Fares Z, Wiley Graham B, Roe Bruce, Binnewies Tim T, Ussery David W, D'Haeze Wim, Den Herder Jeroen, Gevers Dirk, Vereecke Danny, Holsters Marcelle, Oyaizu Hiroshi
Hypothesis
How does the genome of Azorhizobium caulinodans contribute to its nitrogen-fixing capabilities?
Conclusion
The genome analysis reveals that A. caulinodans is a diazotroph that acquired the capacity to nodulate through horizontal gene transfer, making it a promising candidate for exploring biological nitrogen fixation.
Supporting Evidence
- The genome consists of a single circular chromosome of 5.37 Mb.
- A. caulinodans can fix nitrogen both as a free-living organism and in symbiosis with Sesbania rostrata.
- The genome contains 4717 protein-coding genes, with 96.3% having homologs in other organisms.
- Phylogenetic analysis shows that A. caulinodans is closely related to Xanthobacter autotrophicus.
Takeaway
This study looks at the DNA of a special bacterium that helps plants get nitrogen from the air, which is important for their growth. It shows how this bacterium can also live on its own and work with plants.
Methodology
The genome was sequenced using a whole-genome shotgun strategy, and coding regions were predicted through computer prediction and similarity searches.
Digital Object Identifier (DOI)
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