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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Novel structural difference between nopaline- and octopine-type trbJ genes: construction of genetic and physical map and sequencing of trb/traI and rep gene clusters of a new Ti plasmid pTi-SAKURA.

We constructed a gene library of a nopaline-type Ti plasmid (called pTi-SAKURA) which was newly isolated from Agrobacterium tumefaciens MAFF301001 of a Japanese cherry tree. The partial sequencing data, which were distributed over the entire plasmid genome, made it possible to assign typical Ti-encoded genes including trb and rep gene clusters. The trb/traI and rep gene clusters were sequenced completely. All the genes in the regions except trbJ were homologous with the corresponding genes on octopine-type Ti plasmids, based on both ORF size and sequence similarity. The trbJ on pTi-SAKURA is similar to that of an octopine-type Ti, but has an extra 282-base segment in its central domain. The above gene organization and sequences suggest a divergence of Ti plasmid during evolution in relation to Rhizobium plasmids, and is discussed in this paper.[1]

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