Immunome Research
Open Access
ISSN: 1745-7580
+44-20-4587-4809
ISSN: 1745-7580
+44-20-4587-4809
Liu RR
China
Research Article
The Structure and Evolution of Beta-Rhizobial Symbiotic Genes Deduced
from Their Complete Genomes
Author(s): Zheng JZ, Wang R, Liu RR, Chen JJ, Wei Q, Wu XY, Pang XW, James EK and Liu XYZheng JZ, Wang R, Liu RR, Chen JJ, Wei Q, Wu XY, Pang XW, James EK and Liu XY
Abstract Nitrogen-fixing Rhizobia were discovered more than 100 years ago. They are classified into two clades, Alphaand Beta-rhizobia. Their symbiotic function is remarkable, but its origin and evolution has been confusing from a phylogenetic perspective. In this study, we make use of 33 publicly available complete genome sequences downloaded from NCBI, which consist of bacteria and archaea, and focus on 10 strains, constructing symbiotic structural maps for them based on their genomes and previous gene annotations. Phylogenies of the symbiosisessential genes nodA and nifH were examined. Although large incongruities with some hypotheses from previous studies were detected by the present study, we support the general concept that Beta-rhizobia were the original symbionts of legumes, but that their symbotic genes originated from a common ancestor to the Alpha-rhizobia. We also confirm .. View More»
DOI:
10.4172/1745-7580.10000131