Proteomes - Agrobacterium radiobacter (strain K84 / ATCC BAA-868)
|Proteome name||Agrobacterium radiobacter - Reference proteome|
|Strain||K84 / ATCC BAA-868|
|Taxonomy||311403 - Agrobacterium radiobacter (strain K84 / ATCC BAA-868)|
|Last modified||February 4, 2017|
|Pan proteomei||This proteome is part of the Agrobacterium radiobacter pan proteome (fasta)|
Agrobacterium are Gram-negative, motile, soil-dwelling plant pathogens with the species name given based on the disease phenotype associated with the bacteria. They invade the crown, roots and stems of a great variety of plants via wounds causing tumors. The diseases are crown gall, hairy root, and cane gall. Some strains possess a wide host range, whereas other possess a very limited host range. The tumor is correlated with the presence of a large tumor-inducing plasmid (Ti plasmid) in the bacteria. Thus A.tumefaciens causes crown gall on many dicotyledonous plants; A.rubi causes crown gall on raspberries; A.vitis gall formation on grapes; A.rhizogenes causes hairy roots; A.radiobacter is avirulent. However the ability to cause disease is associated with transmissible plasmids, and this grouping is easily disrupted when plasmids move from one strain to another. More recently Agrobacterium have been classified into 3 biovars based on physiological and biochemical phenotypes without consideration of disease; the 2 classification systems are not compatible. There is now a fully sequenced representative of each biovar publicly available.
A.radiobacter K84 is an avirulent biovar II strain used as a biological control agent to prevent crown gall in the field. It does so by producing an antiagrobacterial compound called agrocin 84 to which K84 is resistant but which inhibits other biovar II Agrobacteria. Strain K84 contains 2 chromosomes, only 1 of which has rRNA operons and many essential genes, and 3 plasmids (agrocin 84 production and resistance are encoded on pAgK84). Comparison with other Alphaproteobacteria provides evidence that the second chromosomes of these bacteria are derived from an ancestral plasmid which acquired genes from the primary chromosome. The evidence is supported by analysis of Beta- and Gammaprotobacteria (adapted from PubMed 19251847).
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|Component name||Genome Accession(s)||Proteins|
- "Genome sequences of three Agrobacterium biovars help elucidate the evolution of multichromosome genomes in bacteria."
Slater S.C., Goldman B.S., Goodner B., Setubal J.C., Farrand S.K., Nester E.W., Burr T.J., Banta L., Dickerman A.W., Paulsen I., Otten L., Suen G., Welch R., Almeida N.F., Arnold F., Burton O.T., Du Z., Ewing A. Wood D.W.
J. Bacteriol. 2009:2501-2511(2009) [PubMed] [Europe PMC] [Abstract]