Genomic Sequence of Burkholderia multivorans NKI379, a Soil Bacterium That Inhibits the Growth of Burkholderia pseudomallei.

Burkholderia multivorans NKI379 is a soil bacterium that exhibits an antagonistic effect against the growth of Burkholderia pseudomallei, the causative agent of the infectious disease melioidosis. We report the draft genomic sequence of B. multivorans NKI379, which has a G+C content of 67% and 5,203 candidate protein-encoding genes.

GENOME ANNOUNCEMENT

Burkholderia multivorans, a member of the Burkholderia cepacia complex, is an agent that can infect immunocompromised patients and those with cystic fibrosis (1). However, B. multivorans strains have been used in attempts to develop insecticidal or miticidal agents and have been used as fertilizer supplements to improve plant growth (2, 3). B. multivorans strain NKI379 was first isolated from fertilized agricultural soil in Taiwan (4). This bacterium exhibited an antagonistic effect against the growth of Burkholderia pseudomallei, a soil-borne infectious agent that causes life-threatening melioidosis in humans and animals in Southeast Asia and northern Australia (4, 5). To develop B. multivorans NKI379 as a biological control agent against melioidosis in agriculture, the potentially virulent and antimicrobial genes of this bacterium were sequenced using next-generation sequencing technology.

Total DNA was extracted from B. multivorans NKI379 using a WelPrep DNA kit (Welgene Biotech, Taiwan) according to the manufacturer’s instructions. The genomic DNA was sequenced using an Illumina MiSeq sequencer (Illumina Inc., San Diego, CA, USA). The DNA end-repair, A-tailing, and adaptor-ligation protocols of the TruSeq kit were followed per the manufacturer’s instructions (Illumina). In this study, a short-insert library with an average insert size of 450 bp was sequenced, generating 13,241,890 pass-filter reads totaling 3,972,567,000 bp of Illumina data. Unclear reads were trimmed or removed using Trimmomatic (version 0.32) with a quality threshold of Q20 (>99% accuracy) (6). The trimmed reads were de novo assembled using Velvet (version 1.2.09), and the gene annotation was performed using MAKER pipeline (version 2.28) (7, 8).

The genomic sequence of B. multivorans NKI379 was found to contain a G+C content of 67% and 5,203 candidate protein-encoding genes. A total of 9 protease genes (YP_001946424, WP_006413365, YP_001948758, WP_006396933, YP_001580205, YP_001580356, YP_003709042, WP_006407220, and YP_00194878), 4 hemolysin genes (WP_006400323, WP_006414151, YP_001578869, and WP_006413720) and a burkholderial toxic protein (WP_006404794) with potential roles in bacterial virulence were identified. Two antimicrobial gene sequences encoding linocin M18 (P_001585375) and colicin V (YP_001584586) as well as a putative bacteriocin secretion protein gene sequence (WP_006399594) were also identified.

Nucleotide sequence accession number.

The whole-genome sequence of B. multivorans NKI379 has been deposited at GenBank under the accession number LJJG00000000.