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Draft genome sequence of Zhongshania marina DSW25-10T isolated from seawater
Korean J. Microbiol 2018;54(4):480-482
Published online December 31, 2018
© 2018 The Microbiological Society of Korea.

Ji-Sung Oh, and Dong-Hyun Roh*

Department of Microbiology, Chungbuk National University, Cheongju 28644, Republic of Korea
Correspondence to: E-mail:; Tel.: +82-43-261-3368; Fax: +82-43-264-9600
Received December 10, 2018; Revised December 18, 2018; Accepted December 20, 2018.

The draft genome sequencing for Zhongshania marina DSW25-10T, isolated from deep seawater of East Sea in Korea, was performed using Illumina HiSeq platform. As a result, the draft genome was comprised of a total length of approximately 4.08 Mbp with G + C content of 49.0%, and included a total of 3,702 protein-coding genes, 3 rRNA genes, 39 tRNA genes, 4 non-coding RNA genes, and 36 pseudogenes. In addition, the metabolic pathways of aliphatic and aromatic compounds were identified. In light of these metabolic pathways, Zhongshania marina DSW25-10T is expected to be a useful bioremediation resource.

Keywords : Zhongshania marina DSW25-10T, draft genome sequence, Illumina HiSeq
he genus Zhongshania in the class Gammaproteobacteria was first described by Li et al. (2011), and currently comprises 4 type species and an invalid published species: Z. antarctica (Li et al., 2011), Z. goukunii (Li et al., 2011), Z. aliphaticivorans (Lo et al., 2014), Z. borealis (Jang et al., 2011; Lo et al., 2014), and ‘Z. ponticola’ (Park et al., 2018). These species were isolated from marine environments, such as coastal attached ice, seawater and marine sediment, and characterized as Gram-negative, catalase-, and oxidase-positive, aerobic, and rod-shaped motile by single polar flagellum. Especially, Z. aliphaticivorans, isolated from crude oil contaminated sea-tidal flats, could be able to degrade aliphatic hydrocarbons, and identified the alkane 1-monooxygenase coding genes, catalyzing n-alkanes to fatty alcohols, by full genome sequencing (Jia et al., 2016). In addition, the genome sequence of the strain Zhongshania sp. ZX-21 has been determined (PQGG00000000, unpublished).

The Zhongshania marina DSW25-10T was isolated from 200~500 m deep seawater, using a standard dilution plating method on marine agar 2216 (MA; Difco). For analysis of the genome sequence, the cells were incubated at 25°C in marine broth 2216 (MB; Difco) for 5 days and the genomic DNA was extracted using MagAttract HMW DNA kit (Qiagen). The genome was sequenced using Illumina HiSeq platform by Macrogen Inc. The de novo assembly was performed by SPAdes (version 3.10.0) (Bankevich et al., 2012). The potential contamination of the draft genomes was assessed using ContEst16S (Lee et al., 2017). The total of 46 contigs were obtained with N50 length of 170,247 bp and 150.6 × sequencing depth of coverage. The draft genome size was 4,084,538 bp with G + C content of 49.0%. Genome annotation was conducted by the NCBI Prokaryotic Genome Annotation Pipeline (PGAP) ( and BlastKOALA (Kanehisa et al., 2016). A total of 3,702 protein-coding genes, 3 rRNA genes (5S, 16S, and 23S), 39 tRNA genes, 4 non-coding RNA genes, and 36 pseudogenes were predicted (Table 1).

Genome features of Zhongshania marina DSW25-10T

 Genome featuresValue
No. of contigs46
Depth (×)150.6
Genome size (bp)4,084,538
G + C content (%)49.0
Protein-coding genes3,702
tRNA genes39
rRNA genes (5S, 16S, 23S)3 (1, 1, 1)
Non-coding RNA genes4

The other strains of genus Zhongshiania have three to four alkane 1-monooxygenases whereas the strain DSW25-10T has one alkane 1-monooxygenases and 44% amino acid sequence identity with that (WP_062384540) of Z. aliphaticivorans. The draft genome also contained degradation metabolisms of aromatic compounds. Phenol hydroxylase gene cluster dmpKLMNOP for benzene degradation pathway and catechol meta cleavage pathway gene clusters xylEFGHIJKQ and mhpDEF were found. Associated with toluene degradation pathway, toluene monooxygenase gene cluster tmoABCDEF and aryl-alcohol dehydrogenase were found, but benzaldehyde dehydrogenase (NAD) was not found. Benzene degradation pathway was known that had two primary pathways in first oxidation step, conversion of benzene to phenol by benzene monooxygenase or toluene monooxygenase and benzene to cis-dihydrobenzenediol by benzene 1,2-dioxygenase (Zamanian and Mason, 1987; Tao et al., 2004; Choi et al., 2013). The draft genome of Zhongshania marina DSW25-10T did not include benzene monooxygenase and benzene 1,2-dioxygeanse, but toluene monooxygenase gene cluster was shown comparatively high amino acid sequence similarity with Pseudomonas mendocina KR1 and Ralstonia picketti PKO1, known as oxidize benzene to phenol by toluene monooxygenase. Based on this, it is assumed that Zhongshania marina DSW25-10T might oxidize benzene to phenol by toluene monooxygenase, and then phenol is converted to catechol through phenol hydroxylases.

The Zhongshania marina DSW25-10T, containing degradation metabolisms of saturated and aromatic hydrocarbons, is expected to be a useful biological resource for bioremediation of oil-polluted marine environments.

Nucleotide sequence accession numbers

The strain Zhongshania marina DSW25-10T is available at KCCM 43273 and JCM 17372. The draft genome sequence is accessible in GenBank under the accession number RHGB 00000000. The version described in this paper is version RHGB01000000.

적 요

이 연구에서는 Illumina Hiseq platform을 사용하여 동해 심층 해양수로부터 분리된 Zhongshania marina DSW25-10T의 유전체 염기서열 해독을 수행하였다. 그 결과, 유전체는 대략 4.08 Mbp의 길이 및 49.0%의 G + C 함량으로 구성되었고, 전체 3,702개의 단백질 암호 유전자, 3개의 rRNA 유전자, 39개의 tRNA 유전자, 4개의 non-coding RNA 유전자 및 36개의 위유전자(pseudogenes)가 확인되었다. 또한, 지방족 및 방향족 화합물의 대사 경로가 확인되었다. 이러한 대사 경로들로 비추어 Zhongshania marina DSW25-10T는 유용한 생물 정화 자원으로 사용될 수 있을 것으로 기대된다.


This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1D1A3B04033871).

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December 2018, 54 (4)