Metagenomic data of free cyanide and thiocyanate degrading bacterial communities

The data presented in this article contains the bacterial community structure of the free cyanide (CN-) and thiocyanate (SCN-) degrading organisms that were isolated from electroplating wastewater and synthetic SCN- containing wastewater. PCR amplification of the 16S rRNA V1-V3 regions was undertaken using the 27F and 518R oligonucleotide primers following the metacommunity DNA extraction procedure. The PCR amplicons were processed using the illumina® reaction kits as per manufacturer׳s instruction and sequenced using the illumina® MiSeq-2000, using the MiSeq V3 kit. The data was processed using bioinformatics tools such as QIIME and the raw sequence files are available via NCBI׳s Sequence Read Archive (SRA) database.


a b s t r a c t
The data presented in this article contains the bacterial community structure of the free cyanide (CN -) and thiocyanate (SCN -) degrading organisms that were isolated from electroplating wastewater and synthetic SCNcontaining wastewater. PCR amplification of the 16S rRNA V1-V3 regions was undertaken using the 27F and 518R oligonucleotide primers following the metacommunity DNA extraction procedure. The PCR amplicons were processed using the illumina s reaction kits as per manufacturer's instruction and sequenced using the illumina s MiSeq-2000, using the MiSeq V3 kit. The data was processed using bioinformatics tools such as QIIME and the raw sequence files are available via NCBI's Sequence Read Archive (

Value of the data
This research data provides crucial information on the bacterial community structure and differences between the CDOs and TDOs post-CNand SCNexposure, respectively.
The presented data can be utilized by researchers for comparative studies related to CNand SCNbiodegradation.
The bacterial organisms detected in both the CDOs and TDOs were mainly dominated by bacteria which have never been reported to possess CNand SCNdegradation capabilities, and future research necessitates for the determination of the role that these organisms play in CNand SCNbiodegradation processes.

Data
The presented dataset contains the bacterial composition of free cyanide (CDO) and thiocyanate degrading (TDO) organisms from electroplating and synthetic SCNcontaining wastewater, respectively. Table 1 shows the comparative analysis of the bacterial compositions between the CDOs and TDOs.

Sample collection and isolation procedure
The CDOs were isolated from an electroplating facility wastewater. The wastewater was collected in sterile non-transparent 20 L polypropylene containers and the cyanide concentration was immediately quantified to be above 150 mg CN -/L, using the detection technique developed by [1]. The TDOs were isolated from synthetic SCN --containing wastewater solution (500 mL) containing (g/L); K 2 HPO 4 (3.4), KH 2 PO 4 (4.3), Glucose (0.01), SCN -(0.2) and CN -(0.2), at a pH of 10 (7 0.05), using the gravimetric technique. Briefly, the solution was exposed for two months to allow airborne microorganisms to settle on the media outside the laboratory. A fraction (100 mL) of both the synthetic and electroplating wastewater solutions was filtered sterilized in a 0.22 mm Millipore membrane and the microbial cells were re-suspended in 5 mL of sterile Millipore water in preparation of DNA extraction procedures.

DNA extraction and Sequencing
The metacommunity DNA was extracted directly from the CDO and TDO re-suspension solutions, using commercially available extraction kits (Promega, Madison, Wisconsin, USA), as per manufacturer's instructions. The 16S rRNA forward bacterial primers 27F-16S-5 0 -AGAGTTTGATCMTGGCTCAG-0 3 and reverse primers 518R-16S-5 0 -ATTACCGCGGCTGCTGG-0 3 [2] that targeted the V1 and V3 regions of the 16S rRNA were used for the PCR amplification of the purified DNA samples. The PCR amplicons were gel purified, end repaired and illumina s specific adapter sequence were ligated to each amplicon. Following quantification and purification steps, the amplicons were then sequenced using the illumina s MiSeq-2000, using a MiSeq V3 (600 cycle) kit. 20 Mb of the data (2 Â 300 bp long paired end reads) were produced for each sample as described previously [3]. The Basic Local Alignment Search Tool (BLAST)based data analysis was performed with the assistance of an Inqaba Biotec (Pretoria, South Africa) inhouse developed data analysis pipeline.