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Title: Draft genome sequence of Chromatium okenii isolated from the stratified alpine Lake Cadagno
Authors : Luedin, Samuel
Liechti, Nicole
Cox, Raymond P.
Danza, Francesco
Frigaard, Niels-Ulrik
Posth, Nicole
Pothier, Joël F.
Roman, Samuele
Storelli, Nicola
Wittwer, Matthias
Tonolla, Mauro
Published in : Scientific reports
Volume(Issue) : 9
Issue : 1
Pages : 1936
Publisher / Ed. Institution : Nature Publishing
Issue Date: 2019
License (according to publishing contract) : CC BY 4.0: Attribution 4.0 International
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 570: Biology
Abstract: Blooms of purple sulfur bacteria (PSB) are important drivers of the global sulfur cycling oxidizing reduced sulfur in intertidal flats and stagnant water bodies. Since the discovery of PSB Chromatium okenii in 1838, it has been found that this species is characteristic of for stratified, sulfidic Environments worldwide and its autotrophic metabolism has been studied in depth since. We describe here the first high-quality draft genome of a large-celled, phototrophic, γ-proteobacteria of the genus Chromatium isolated from the stratified alpine Lake Cadagno, C. okenii strain LaCa. Long read technology was used to assemble the 3.78 Mb genome that encodes 3,016 protein-coding genes and 67 RNA genes. Our findings are discussed from an ecological perspective related to Lake Cadagno. Moreover, findings of previous studies on the phototrophic and the proposed chemoautotrophic metabolism of C. okenii were confirmed on a genomic level. We additionally compared the C. okenii genome with other genomes of sequenced, phototrophic sulfur bacteria from the same environment. We found that biological functions involved in chemotaxis, movement and S-layer-proteins were enriched in strain LaCa. We describe these features as possible adaptions of strain LaCa to rapidly changing environmental conditions within the chemocline and the protection against phage infection during blooms. The high quality draft genome of C. okenii strain LaCa thereby provides a basis for future functional research on bioconvection and phage infection dynamics of blooming PSB.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Article in scientific Journal
DOI : 10.1038/s41598-018-38202-1
ISSN: 2045-2322
Published as part of the ZHAW project : High-throughput proteomics of Thiodictyon synthrophicum strain Cad16T
Appears in Collections:Publikationen Life Sciences und Facility Management

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