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Draft genome sequence of Staphylococcus sp. EZ-P03 isolated from a mesophilic anaerobic digester
BMC Research Notes volume 11, Article number: 694 (2018)
Staphylococcus species of the family Staphylococcaceae are facultatively anaerobic Gram-positive cocci growing in clusters, pairs and occasionally in short chains. Staphylococci can be detected in different environments. They are common commensals, but some can also cause infections in humans. Hence, their investigation is required to understand ecology and genetics and to create an opportunity for comparative studies.
In this study, we report the determination of a draft genome sequence of Staphylococcus sp. strain EZ-P03 which was isolated from anaerobically digested chicken waste materials. The draft genome of Staphylococcus sp. EZ-P03 constituted a total of 62 contigs (> 500 bp) amounting to 2,689,358 bp with a G+C content of 37.3% and a N50 contig size of 126,562 bp. The whole genome shotgun project of Staphylococcus sp. strain EZ-P03 has been deposited at DDBJ/ENA/GenBank under the accession number QPMO00000000.
Staphylococcus species of the family Staphylococcaceae are facultatively anaerobic Gram-positive cocci growing in clusters, pairs and occasionally in short chains. Staphylococci grow by respiration or fermentation and can be found in different environmental niches. S. aureus and S. epidermidis species are common commensals but have a high pathogenic potential. S. saprophyticus, S. haemolyticus, S. simulans, S. cohnii, S. warneri and others can also cause infections in human [1, 2]. Some Staphylococcus species with proteolytic activities have been shown to survive in various anaerobic digesters [3, 4]. The anaerobic digestion process is an appropriate technology for different agricultural wastes utilization [5, 6]; however, it is also important to develop effective hygiene and sanitation procedures to minimize the potential disease transfer risk [7, 8]. Genome analysis of species belonging to the genus Staphylococcus is required to understand their ecology and genetics and to create an opportunity for comparative studies.
Staphylococcus sp. EZ-P03 was isolated from a mesophilic anaerobic digester operated at high ammonia levels (> 6.0 NH4–N g L−1) and fed with chicken manure as monosubstrate . The strain Staphylococcus sp. EZ-P03 was cultured at + 37 °C on Luria agar for 48 h under microaerophilic conditions. Genomic DNA from the bacterial cells (washed with sterile phosphate buffer solution) was extracted with the FastDNA spin kit (#116540600; MP Biomedicals). DNA quantification and quality control were performed by agarose gel electrophoresis and measurement with a NanoDrop 2000 spectrophotometer (#ND-2000; Thermo Fisher Scientific) confirming an optical density 260/280 of between 1.8 and 2 and finally stored at – 20 °C. The bacterial strain EZ-P03 was initially identified based on morphological, biochemical and growth characteristics and finally confirmed by sequencing of the 16S rRNA gene (Table 1) (16S rRNA gene sequence, 1404 bp, BLAST identity of 99% to S. simulans and 98% to S. piscifermentans, S. condiment and S. carnosus).
The paired-end DNA libraries were prepared as described previously by us  as well as in accordance with the Illumina protocol. DNA fragmentation and DNA library preparation were checked with a High Sensitivity DNA kit (#5067-4626; Agilent) and a 2100 Bioanalyzer (#G2939BA; Agilent). Genome sequencing was fulfilled with an Illumina MiSeq platform (#SY-410-1003; Illumina) at Joint KFU-Riken Laboratory, Kazan (Volga Region) Federal University (Kazan, Russia) as detailed previously . A quality of the sequence data was analyzed with the FastQC software , the genome was assembled with the algorithm package Velvet, version 1.2.10 , and the arrangement of contigs was then achieved with the Mauve program, version 2.4.0 . Rapid Annotation System Technology (RAST) server (annotation scheme: RASTtk) was used to annotate the whole genome sequence of Staphylococcus sp. strain EZ-P03 . The rRNA and tRNA genes were predicted with the RNAmmer 1.2  and tRNA scan-SE 1.23 , accordingly. PlasmidFinder-1.3 Server was used to identify plasmids in the sequenced strain . Comparison of the genomic feature of Staphylococcus sp. strain EZ-P03 with some other Staphylococcus species was fulfilled with the data received from an integrated database EzBioCloud . Finally, the strain was identified as Staphylococcus sp. belonging to the family Staphylococcaceae within the phylum Firmicutes.
The draft genome of Staphylococcus sp. strain EZ-P03 constituted a total of 62 contigs (> 500 bp) amounting to 2,689,358 bp with a G+C content of 37.3% and a N50 contig size of 126,562 bp. Two plasmid sequences were also identified in the strain EZ-P03 (3018 bp and 1111 bp). RAST server predicted 2571 coding sequences. The genome of Staphylococcus sp. strain EZ-P03 was shown to encode at least 68 RNAs, including 8 rRNAs and 60 tRNAs. The strain Staphylococcus sp. EZ-P03 has several genes responsible for saccharides and proteins degradation, mixed acid and lactate fermentation, as well as urea decomposition. Moreover, several genes responsible for resistance to antibiotics (such as fluoroquinolones) and toxic compounds, including mercury, arsenic, cadmium and chromium compounds, were observed.
The exact length of the genome, synteny, number of rRNA genes and repetitive elements cannot be reported since the obtained data is based on the draft level genome sequence.
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WSM and EEZ conducted experiments, fulfilled genome analysis and interpretation of the data. EIS and LHS performed Illumina sequencing. AMZ supervised the project, designed the study and wrote the manuscript. All authors read and approved the final manuscript.
The authors declare that they have no competing interests.
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This study was funded by the Russian Foundation for Basic Research [Grant No. 16-34-60093 mol_a_dk]. Additional support was provided by the grant of the President of the Russian Federation for the young scientists [Grant No. MД-100.2017.4].
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Ziganshina, E.E., Mohammed, W.S., Shagimardanova, E.I. et al. Draft genome sequence of Staphylococcus sp. EZ-P03 isolated from a mesophilic anaerobic digester. BMC Res Notes 11, 694 (2018) doi:10.1186/s13104-018-3784-9
- Draft genome
- Staphylococcus sp.
- Chicken manure
- Laboratory-scale mesophilic reactor