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  • Title: Multilocus sequence analysis of the actinobacterial genus Kribbella.
    Author: Curtis SM, Meyers PR.
    Journal: Syst Appl Microbiol; 2012 Oct; 35(7):441-6. PubMed ID: 22981391.
    Abstract:
    Multilocus sequence analysis (MLSA) was used to refine the phylogenetic analysis of the genus Kribbella, which currently contains 17 species with validly-published names. Sequences were obtained for the 16S rRNA, gyrB, rpoB, recA, relA and atpD genes for 16 of the 17 type strains of the genus plus seven non-type strains. A five-gene concatenated sequence of 4099 nt was used to examine the phylogenetic relationships between the species of the genus Kribbella. Using the concatenated sequence of the gyrB-rpoB-recA-relA and atpD genes, most Kribbella type strains can be distinguished by a genetic distance of >0.04. Each single-gene tree had an overall topology similar to that of the concatenated sequence tree. The single-gene relA tree, used here for the first time in MLSA of actinobacteria, had good bootstrap support, comparable to the rpoB and atpD gene trees, which had topologies closest to that of the concatenated sequence tree. This illustrates that relA is a useful addition in MLSA studies of the genus Kribbella. We propose that concatenated gyrB-rpoB-recA-relA-atpD gene sequences be used for examining the phylogenetic relationships within the genus Kribbella and for determining the closest phylogenetic relatives to be used for taxonomic comparisons.
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