ArticleJournal of bacteriology2002
Comparative sequence analysis of the symbiosis island of Mesorhizobium loti strain R7A.
Article in Journal of bacteriology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 116 papers.
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Who cites it
116 citing papers in PubMed, 318 citations in OpenAlex.
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- A glycan receptor kinase facilitates intracellular accommodation of arbuscular mycorrhiza and symbiotic rhizobia in the legume Lotus japonicus.PLoS biology · 2023Article
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- Rhizobial diversity is associated with inoculation history at a two-continent scale.FEMS microbiology ecology · 2022Article
- An epigenetic switch activates bacterial quorum sensing and horizontal transfer of an integrative and conjugative element.Nucleic acids research · 2022Article
- Microevolution, speciation and macroevolution in rhizobia: Genomic mechanisms and selective patterns.Frontiers in plant science · 2022Review
- Evolution of rhizobial symbiosis islands through insertion sequence-mediated deletion and duplication.The ISME journal · 2022Article
- Comparative Genomics across Three Ensifer Species Using a New Complete Genome Sequence of the Medicago SymbiontMicroorganisms · 2021Article
- Comparative analysis of integrative and conjugative mobile genetic elements in the genusMicrobial genomics · 2021Article
- Phylogenomic Reconstruction and Metabolic Potential of the GenusMicroorganisms · 2021Article
- Rhizobial Exopolysaccharides: Genetic Regulation of Their Synthesis and Relevance in Symbiosis with Legumes.International journal of molecular sciences · 2021Review
- Evolution of diverse effective NApplied and environmental microbiology · 2021Article
- Duplication of Symbiotic Lysin Motif Receptors Predates the Evolution of Nitrogen-Fixing Nodule Symbiosis.Plant physiology · 2020Article
- Rhizobium leguminosarum bv. trifolii NodD2 Enhances Competitive Nodule Colonization in the Clover-Rhizobium Symbiosis.Applied and environmental microbiology · 2020Article
56 more citing papers are in PubMed but not listed here.
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Authors and funding
14 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Mesorhizobium loti strain R7A symbiosis island is a 502-kb chromosomally integrated element which transfers to nonsymbiotic mesorhizobia in the environment, converting them to Lotus symbionts. It integrates into a phenylalanine tRNA gene in a process mediated by a P4-type integrase encoded at the left end of the element. We have determined the nucleotide sequence of the island and compared its deduced genetic complement with that reported for the 611-kb putative symbiosis island of M. loti strain MAFF303099. The two islands share 248 kb of DNA, with multiple deletions and insertions of up to 168 kb interrupting highly conserved colinear DNA regions in the two strains. The shared DNA regions contain all the genes likely to be required for Nod factor synthesis, nitrogen fixation, and island transfer. Transfer genes include a trb operon and a cluster of potential tra genes which are also present on the strain MAFF303099 plasmid pMLb. The island lacks plasmid replication genes, suggesting that it is a site-specific conjugative transposon. The R7A island encodes a type IV secretion system with strong similarity to the vir pilus from Agrobacterium tumefaciens that is deleted from MAFF303099, which in turn encodes a type III secretion system not found on the R7A island. The 414 genes on the R7A island also include putative regulatory genes, transport genes, and an array of metabolic genes. Most of the unique hypothetical genes on the R7A island are strain-specific and clustered, suggesting that they may represent other acquired genetic elements rather than symbiotically relevant DNA.
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