Genome Sequence Of
, An Obligate Aerobe Specialized To Support Diverse Anaerobic Metabolic Processes
João C. Setubal, Patricia dos Santos, Barry S. Goldman, Helga Ertesvåg, Guadelupe Espin, Luis M. Rubio, Svein Valla, Nalvo F. Almeida, Divya Balasubramanian, Lindsey Cromes, Leonardo Curatti, Zijin Du, Eric Godsy, Brad Goodner, Kaitlyn Hellner-Burris, José A. Hernandez, Katherine Houmiel, Juan Imperial, Christina Kennedy, Timothy J. Larson, Phil Latreille, Lauren S. Ligon, Jing Lu, Mali Mærk, Nancy M. Miller, Stacie Norton, Ina P. O'Carroll, Ian Paulsen, Estella C. Raulfs, Rebecca Roemer, James Rosser, Daniel Segura, Steve Slater, Shawn L. Stricklin, David J. Studholme, Jian Sun, Carlos J. Viana, Erik Wallin, Baomin Wang, Cathy Wheeler, Huijun Zhu, Dennis R. Dean, Ray Dixon, Derek Wood
is a soil bacterium related to the
genus that fixes nitrogen under aerobic conditions while simultaneously protecting nitrogenase from oxygen damage. In response to carbon availability, this organism undergoes a simple differentiation process to form cysts that are resistant to drought and other physical and chemical agents. Here we report the complete genome sequence of
DJ, which has a single circular genome of 5,365,318 bp. In order to reconcile an obligate aerobic lifestyle with exquisitely oxygen-sensitive processes,
is specialized in terms of its complement of respiratory proteins. It is able to produce alginate, a polymer that further protects the organism from excess exogenous oxygen, and it has multiple duplications of alginate modification genes, which may alter alginate composition in response to oxygen availability. The genome analysis identified the chromosomal locations of the genes coding for the three known oxygen-sensitive nitrogenases, as well as genes coding for other oxygen-sensitive enzymes, such as carbon monoxide dehydrogenase and formate dehydrogenase. These findings offer new prospects for the wider application of
as a host for the production and characterization of oxygen-sensitive proteins.