Discovery of a novel filamentous prophage in the genome of the microsymbiont STM 6018.

Integrated virus genomes (prophages) are commonly found in sequenced bacterial genomes but have rarely been described in detail for rhizobial genomes. STM 6018 is a rhizobial strain that was isolated in 2006 from a root nodule of a host in French Guiana, South America. Here we describe features of the genome of STM 6018, focusing on the characterization of two different types of prophages that have been identified in its genome.

The Genome of the Acid Soil-Adapted Strain OR191 Encodes Determinants for Effective Symbiotic Interaction With Both an Inverted Repeat Lacking Clade and a Phaseoloid Legume Host.

Although forms highly effective symbioses with the comparatively acid-sensitive genus , its introduction into acid soils appears to have selected for symbiotic interactions with acid-tolerant strains. has the unusual ability of being able to nodulate and fix nitrogen, albeit sub-optimally, not only with but also with the promiscuous host . Here we describe the genome of OR191 and genomic features important for the symbiotic interaction with both of these hosts.

Novel heavy metal resistance gene clusters are present in the genome of Cupriavidus neocaledonicus STM 6070, a new species of Mimosa pudica microsymbiont isolated from heavy-metal-rich mining site soil.

Background: Cupriavidus strain STM 6070 was isolated from nickel-rich soil collected near Koniambo massif, New Caledonia, using the invasive legume trap host Mimosa pudica. STM 6070 is a heavy metal-tolerant strain that is highly effective at fixing nitrogen with M. pudica.

High-quality draft genome sequence of Mlalz-1, a microsymbiont of (L.) miller collected in Lanzarote, Canary Islands, Spain.

10.1601/nm.1335 Mlalz-1 (INSDC = ATZD00000000) is an aerobic, motile, Gram-negative, non-spore-forming rod that was isolated from an effective nitrogen-fixing nodule of (L.

High-quality permanent draft genome sequence of the type strain USDA 76, isolated from (L.) Merr.

USDA 76 (INSCD = ARAG00000000), the type strain for , is an aerobic, motile, Gram-negative, non-spore-forming rod that was isolated from an effective nitrogen-fixing root nodule of (L. Merr) grown in the USA. Because of its significance as a microsymbiont of this economically important legume, USDA 76 was selected as part of the DOE Joint Genome Institute 2010 sequencing project.

High-quality draft genome sequence of strain STM6155, a microsymbiont from New Caledonia.

STM6155 (INSCD = ATYY01000000) is an aerobic, motile, Gram-negative, non-spore-forming rod that can exist as a soil saprophyte or as an effective nitrogen fixing microsymbiont of the legume L.. STM6155 was isolated in 2009 from a nodule of the trap host grown in nickel-rich soil collected near Mont Dore, New Caledonia.

Evolution of a multi-step phosphorelay signal transduction system in Ensifer: recruitment of the sigma factor RpoN and a novel enhancer-binding protein triggers acid-activated gene expression.

Most Ensifer strains are comparatively acid sensitive, compromising their persistence in low pH soils. In the acid-tolerant strain Ensifer medicae WSM419, the acid-activated expression of lpiA is essential for enhancing survival in lethal acidic conditions. Here we characterise a multi-step phosphorelay signal transduction pathway consisting of TcsA, TcrA, FsrR, RpoN and its cognate enhancer-binding protein EbpA, which is required for the induction of lpiA and the downstream acvB gene.

Complete genome sequence of the Medicago microsymbiont Ensifer (Sinorhizobium) medicae strain WSM419.

Ensifer (Sinorhizobium) medicae is an effective nitrogen fixing microsymbiont of a diverse range of annual Medicago (medic) species. Strain WSM419 is an aerobic, motile, non-spore forming, Gram-negative rod isolated from a M. murex root nodule collected in Sardinia, Italy in 1981.