J Genomics 2017; 5:12-15. doi:10.7150/jgen.17863

Research Paper

Genomic characterization of eight Ensifer strains isolated from pristine caves and a whole genome phylogeny of Ensifer (Sinorhizobium)

Heerman Kumar Sandra Kumar1,2#, Han Ming Gan1,2#, Mun Hua Tan1,2, Wilhelm Wei Han Eng1,2, Hazel A. Barton3, André O. Hudson4, Michael A. Savka4✉

1. School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
2. Genomics Facility, Tropical Medicine and Biology Platform, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia.
3. Department of Biology, University of Akron, Akron, Ohio, USA.
4. Thomas H. Gosnell School of Life Sciences, Rochester Institute of Technology Rochester, NY, USA.
# equal contribution

Abstract

A total of eight Ensifer sp. strains were isolated from two pristine cave environments. One strain was isolated from a cave water pool located in the Wind Cave National Park, South Dakota, USA and the remaining seven strains were isolated from Lechuguilla Cave of Carlsbad Caverns National Park, New Mexico, USA. Whole genome sequencing and comparative genomic analyses of the eight isolates compared to various type strains from the genera Ensifer and Sinorhizobium demonstrates that although members in these genera can be phylogenetically separated into two distinct clades, the percentage of conserved proteins (POCP) between various type strains from Ensifer and Sinorhizobium are consistently higher than 50%, providing strong genomic evidence to support the classification of the genera Ensifer and Sinorhizobium into a single genus.

Keywords: Ensifer sp. Strains, Sinorhizobium

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How to cite this article:
Kumar HKS, Gan HM, Tan MH, Eng WWH, Barton HA, Hudson AO, Savka MA. Genomic characterization of eight Ensifer strains isolated from pristine caves and a whole genome phylogeny of Ensifer (Sinorhizobium). J Genomics 2017; 5:12-15. doi:10.7150/jgen.17863. Available from http://www.jgenomics.com/v05p0012.htm