scholarly journals Statistical Optimisation of Phenol Degradation and Pathway Identification through Whole Genome Sequencing of the Cold-Adapted Antarctic Bacterium, Rhodococcus sp. Strain AQ5-07

2020 ◽  
Vol 21 (24) ◽  
pp. 9363
Author(s):  
Gillian Li Yin Lee ◽  
Nur Nadhirah Zakaria ◽  
Peter Convey ◽  
Hiroyuki Futamata ◽  
Azham Zulkharnain ◽  
...  

Study of the potential of Antarctic microorganisms for use in bioremediation is of increasing interest due to their adaptations to harsh environmental conditions and their metabolic potential in removing a wide variety of organic pollutants at low temperature. In this study, the psychrotolerant bacterium Rhodococcus sp. strain AQ5-07, originally isolated from soil from King George Island (South Shetland Islands, maritime Antarctic), was found to be capable of utilizing phenol as sole carbon and energy source. The bacterium achieved 92.91% degradation of 0.5 g/L phenol under conditions predicted by response surface methodology (RSM) within 84 h at 14.8 °C, pH 7.05, and 0.41 g/L ammonium sulphate. The assembled draft genome sequence (6.75 Mbp) of strain AQ5-07 was obtained through whole genome sequencing (WGS) using the Illumina Hiseq platform. The genome analysis identified a complete gene cluster containing catA, catB, catC, catR, pheR, pheA2, and pheA1. The genome harbours the complete enzyme systems required for phenol and catechol degradation while suggesting phenol degradation occurs via the β-ketoadipate pathway. Enzymatic assay using cell-free crude extract revealed catechol 1,2-dioxygenase activity while no catechol 2,3-dioxygenase activity was detected, supporting this suggestion. The genomic sequence data provide information on gene candidates responsible for phenol and catechol degradation by indigenous Antarctic bacteria and contribute to knowledge of microbial aromatic metabolism and genetic biodiversity in Antarctica.

2018 ◽  
Vol 7 (18) ◽  
Author(s):  
Wai-Sing Chan ◽  
Chun-Hang Au ◽  
Henry Chi-Ming Leung ◽  
Dona N. Ho ◽  
Tsun-Leung Chan ◽  
...  

Isolation of Helicobacter cinaedi from a positive blood culture requires prolonged and stringent subculture conditions. Direct whole-genome sequencing (WGS) of a positive blood culture may provide timely treatment-associated genetic information.


2019 ◽  
Vol 8 (15) ◽  
Author(s):  
Moon Y. F. Tay ◽  
Frederick Adzitey ◽  
Stella Amelia Sultan ◽  
Joseph Makija Tati ◽  
Kelyn L. G. Seow ◽  
...  

Here, we report the draft genome sequences of 16 nontyphoidal Salmonella enterica isolates obtained from locally produced meats in Tamale, Ghana, which are commonly consumed by most natives as an important protein source. The draft genomes will help provide a molecular snapshot of Salmonella enterica isolates found in these retail meats in Tamale.


2020 ◽  
Vol 9 (21) ◽  
Author(s):  
Daniel L. Vera ◽  
Arman Seuylemezian ◽  
Kyle S. Landry ◽  
Ryan Hendrickson

ABSTRACT Whole-genome sequencing and annotation have allowed planetary protection engineers to assess the functional capabilities of microorganisms isolated from spacecraft hardware and associated surfaces. Here, we report draft genomes of six strains isolated from the InSight mission, determined using Oxford Nanopore- and Illumina-based sequencing.


2019 ◽  
Vol 8 (17) ◽  
Author(s):  
Kevin Cole ◽  
Dona Foster ◽  
Julie E. Russell ◽  
Tanya Golubchik ◽  
Martin Llewelyn ◽  
...  

Members of the genus Staphylococcus have been isolated from humans, animals, and the environment. Accurate identification with whole-genome sequencing requires access to data derived from type strains.


2020 ◽  
Vol 110 (7) ◽  
pp. 1255-1259
Author(s):  
Emily Giroux ◽  
Guillaume J. Bilodeau

The filamentous ascomycete fungus Lachnellula willkommii is the causal agent of European larch canker (ELC), one of the most destructive diseases of larch in Europe and a regulated plant pathogen of quarantine significance in Canada and the United States. L. willkommii was first detected in Massachusetts, North America in 1927 on a larch plantation cultivated with nursery stock imported from Great Britain. Despite the decades of practices aimed at eliminating the pathogen, it has reappeared in coastal areas of Canada and the United States. There is concern ELC could spread throughout the range of eastern larch, a transcontinental species typical of the Boreal forest that spans the North American landscape. There is geographic range overlap between several nonpathogenic indigenous Lachnellula species and the reported distribution of L. willkommii in North America. Morphological and biological methods to distinguish L. willkommii are often inadequate as the fungus does not always produce the phenotypic structures that distinguish it from these other saprophytic Lachnellula species. Whole genome sequencing technologies were used to obtain the draft genome sequences of L. willkommii and six other Lachnellula species. Molecular markers identified from the genomic data may be used to discriminate L. willkommii from its nonpathogenic relatives.


2020 ◽  
Vol 9 (11) ◽  
Author(s):  
Anthony Mannion ◽  
Tina McCollester ◽  
Alexander Sheh ◽  
Zeli Shen ◽  
Hilda Holcombe ◽  
...  

A fast-growing Mycobacterium species was cultured from draining, purulent lesions on the caudal abdomen of a 12-year-old male domestic long-haired cat. Whole-genome sequencing identified the organism as Mycobacterium porcinum.


2021 ◽  
Vol 10 (38) ◽  
Author(s):  
Meora Rajeev ◽  
T. J. Sushmitha ◽  
Subba Rao Toleti ◽  
Shunmugiah Karutha Pandian

Pseudoalteromonas tetraodonis strain kknpp56 is an exopolysaccharide (EPS)-producing marine bacterium that forms potent biofilm. To determine the biosynthesis pathways involved in the EPS production of this bacterium, whole-genome sequencing was performed. The complete genome comes from one chromosome containing 3.72 Mbp of DNA with a G+C content of 41%.


2019 ◽  
Vol 85 (23) ◽  
Author(s):  
Shaokang Zhang ◽  
Hendrik C. den Bakker ◽  
Shaoting Li ◽  
Jessica Chen ◽  
Blake A. Dinsmore ◽  
...  

ABSTRACT SeqSero, launched in 2015, is a software tool for Salmonella serotype determination from whole-genome sequencing (WGS) data. Despite its routine use in public health and food safety laboratories in the United States and other countries, the original SeqSero pipeline is relatively slow (minutes per genome using sequencing reads), is not optimized for draft genome assemblies, and may assign multiple serotypes for a strain. Here, we present SeqSero2 (github.com/denglab/SeqSero2; denglab.info/SeqSero2), an algorithmic transformation and functional update of the original SeqSero. Major improvements include (i) additional sequence markers for identification of Salmonella species and subspecies and certain serotypes, (ii) a k-mer based algorithm for rapid serotype prediction from raw reads (seconds per genome) and improved serotype prediction from assemblies, and (iii) a targeted assembly approach for specific retrieval of serotype determinants from WGS for serotype prediction, new allele discovery, and prediction troubleshooting. Evaluated using 5,794 genomes representing 364 common U.S. serotypes, including 2,280 human isolates of 117 serotypes from the National Antimicrobial Resistance Monitoring System, SeqSero2 is up to 50 times faster than the original SeqSero while maintaining equivalent accuracy for raw reads and substantially improving accuracy for assemblies. SeqSero2 further suggested that 3% of the tested genomes contained reads from multiple serotypes, indicating a use for contamination detection. In addition to short reads, SeqSero2 demonstrated potential for accurate and rapid serotype prediction directly from long nanopore reads despite base call errors. Testing of 40 nanopore-sequenced genomes of 17 serotypes yielded a single H antigen misidentification. IMPORTANCE Serotyping is the basis of public health surveillance of Salmonella. It remains a first-line subtyping method even as surveillance continues to be transformed by whole-genome sequencing. SeqSero allows the integration of Salmonella serotyping into a whole-genome-sequencing-based laboratory workflow while maintaining continuity with the classic serotyping scheme. SeqSero2, informed by extensive testing and application of SeqSero in the United States and other countries, incorporates important improvements and updates that further strengthen its application in routine and large-scale surveillance of Salmonella by whole-genome sequencing.


2020 ◽  
Vol 33 (5) ◽  
pp. 715-717 ◽  
Author(s):  
Kiran Kirdat ◽  
Bhavesh Tiwarekar ◽  
Vipool Thorat ◽  
Nitin Narawade ◽  
Dhiraj Dhotre ◽  
...  

We performed whole-genome sequencing of two phytoplasmas associated with sugarcane grassy shoot (SCGS) and Bermuda grass white leaf diseases. These are the first draft genomes of SCGS phytoplasma (strain SCGS) and ‘Candidatus Phytoplasma cynodontis’ (strain LW01) and may help to delineate these phytoplasmas at a finer taxonomic level.


2014 ◽  
Vol 53 (2) ◽  
pp. 727-730 ◽  
Author(s):  
Witchuda Kamolvit ◽  
Petra Derrington ◽  
David L. Paterson ◽  
Hanna E. Sidjabat

An IMP-4-producingAcinetobacterpittiistrain coproducing oxacillinases was isolated from a leg wound of a 67-year-old female patient. Identification to the species level byrpoBandgyrBsequencing and multiplex-PCR-based analysis revealed that the isolate wasA. pittii. Whole-genome sequencing of thisA. pittiiisolate determined the presence ofblaOXA-96,blaCARB-2, and a novelblaOXA-421gene. The position of this novelblaOXA-421gene was similar to that ofblaOXA-51inA. baumannii, downstream of the phosphinothricinN-acetyltransferase gene and upstream offxsAin the chromosome. ThisA. pittiiisolate was found to belong to sequence type 119 (ST119). Here, we report the first isolation of IMP-4-producingA. pittiiST119 with a novelblaOXA-421gene from a patient in Australia and characterize its draft genome.


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