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. 2017 Feb 2:8:129.
doi: 10.3389/fmicb.2017.00129. eCollection 2017.

Genome Insight and Comparative Pathogenomic Analysis of Nesterenkonia jeotgali Strain CD08_7 Isolated from Duodenal Mucosa of Celiac Disease Patient

Atul M Chander  1 , Ramesan G Nair  2 , Gurwinder Kaur  2 , Rakesh Kochhar  3 , Devinder K Dhawan  4 , Sanjay K Bhadada  5 , Shanmugam Mayilraj  2
Affiliations

Genome Insight and Comparative Pathogenomic Analysis of Nesterenkonia jeotgali Strain CD08_7 Isolated from Duodenal Mucosa of Celiac Disease Patient

Atul M Chander et al. Front Microbiol. .

Abstract

Species of the genus Nesterenkonia have been isolated from different ecological niches, especially from saline habitats and reported as weak human pathogens causing asymptomatic bacteraemia. Here, for the first time we are reporting the genome sequence and pathogenomic analysis of a strain designated as CD08_7 isolated from the duodenal mucosa of a celiac disease patient, identified as Nesterenkonia jeotgali. To date, only five strains of the genus Nesterenkonia (N. massiliensis strain NP1T, Nesterenkonia sp. strain JCM 19054, Nesterenkonia sp. strain F and Nesterenkonia sp. strain AN1) have been whole genome sequenced and annotated. In the present study we have mapped and compared the virulence profile of N. jeotgali strain CD08_7 along with other reference genomes which showed some characteristic features that could contribute to pathogenicity. The RAST (Rapid Annotation using Subsystem Technology) based genome mining revealed more genes responsible for pathogenicity in strain CD08_7 when compared with the other four sequenced strains. The studied categories were resistance to antibiotic and toxic compounds, invasion and intracellular resistance, membrane transport, stress response, osmotic stress, oxidative stress, phages and prophages and iron acquisition. A total of 1431 protein-encoding genes were identified in the genome of strain CD08_7 among which 163 were predicted to contribute for pathogenicity. Out of 163 genes only 59 were common to other genome, which shows the higher levels of genetic richness in strain CD08_7 that may contribute to its functional versatility. This study provides a comprehensive analysis on genome of N. jeotgali strain CD08_7 and possibly indicates its importance as a clinical pathogen.

Keywords: Nesterenkonia jeotgali; RAST; celiac disease; comparative genomics; genome sequencing; gut; pathogenicity.

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Figures

FIGURE 1
FIGURE 1
Neighbor-joining tree. Neighbor-joining tree based on 16S rDNA sequences, showing the phylogenetic relationship between Nesterenkonia species and other related members of the genus Nesterenkonia. Cellulomonas flavigena DSM 20109T (CP001964) was used as an outgroup Bootstrap values (expressed as percentage of 100 replications) greater than 70% are given at the nodes. Filled circles indicate that corresponding nodes were also recovered in the trees generated with maximum parsimony and maximum likelihood algorithms. Bar 0.01% sequence variation.
FIGURE 2
FIGURE 2
Genes involved in virulence, disease, and defense.
FIGURE 3
FIGURE 3
Comparison of genes present in the Nesterenkonia strains involved in conferring resistance against antibiotics and toxic compounds.
FIGURE 4
FIGURE 4
Comparison of gene homologs present in the Nesterenkonia strains involved in invasion and intra cellular resistance.
FIGURE 5
FIGURE 5
Genes involved in Membrane transport.
FIGURE 6
FIGURE 6
Genes involved in Stress response.
FIGURE 7
FIGURE 7
Comparison of genes present in the Nesterenkonia strains involved in Osmotic Stress.
FIGURE 8
FIGURE 8
Comparison of genes present in the Nesterenkonia strains involved in Oxidative Stress.
FIGURE 9
FIGURE 9
Genes involved in Phages, Prophages, Transposable elements, Plasmids.
FIGURE 10
FIGURE 10
Comparison of genes present in the Nesterenkonia strains involved in Phages, Prophages.
FIGURE 11
FIGURE 11
Genes involved in iron acquisition and metabolism.
FIGURE 12
FIGURE 12
Comparison of genes present in the Nesterenkonia strains involved in siderophores and iron acquisition and metabolism.
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