Occurrence of Horizontal Gene Transfer of PIB-type ATPase Genes among Bacteria Isolated from an Uranium Rich Deposit of Domiasiat in North East India

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Abstract

Uranium (U) tolerant aerobic heterotrophs were isolated from the subsurface soils of one of the pre-mined U-rich deposits at Domiasiat located in the north-eastern part of India. On screening of genomic DNA from 62 isolates exhibiting superior U and heavy metal tolerance, 32 isolates were found to be positive for P(IB)-type ATPase genes. Phylogenetic incongruence and anomalous DNA base compositions revealed the acquisition of P(IB)-type ATPase genes by six isolates through horizontal gene transfer (HGT). Three of these instances of HGT appeared to have occurred at inter-phylum level and the other three instances indicated to have taken place at intra-phylum level. This study provides an insight into one of the possible survival strategies that bacteria might employ to adapt to environments rich in uranium and heavy metals.

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Nongkhlaw, M., Kumar, R., Acharya, C., & Joshi, S. R. (2012). Occurrence of Horizontal Gene Transfer of PIB-type ATPase Genes among Bacteria Isolated from an Uranium Rich Deposit of Domiasiat in North East India. PLoS ONE, 7(10). https://doi.org/10.1371/journal.pone.0048199

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