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Distinctive characters of Nostoc genomes in cyanolichens

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Gagunashvili, Andrey
dc.contributor.author Andrésson, Ólafur
dc.date.accessioned 2018-11-27T14:59:19Z
dc.date.available 2018-11-27T14:59:19Z
dc.date.issued 2018-06-05
dc.identifier.citation Gagunashvili, A. N., & Andrésson, Ó. S. (2018). Distinctive characters of Nostoc genomes in cyanolichens. BMC Genomics, 19(1), 434. doi:10.1186/s12864-018-4743-5
dc.identifier.issn 1471-2164
dc.identifier.uri https://hdl.handle.net/20.500.11815/924
dc.description Publisher's version (útgefin grein)
dc.description.abstract Background Cyanobacteria of the genus Nostoc are capable of forming symbioses with a wide range of organism, including a diverse assemblage of cyanolichens. Only certain lineages of Nostoc appear to be able to form a close, stable symbiosis, raising the question whether symbiotic competence is determined by specific sets of genes and functionalities. Results We present the complete genome sequencing, annotation and analysis of two lichen Nostoc strains. Comparison with other Nostoc genomes allowed identification of genes potentially involved in symbioses with a broad range of partners including lichen mycobionts. The presence of additional genes necessary for symbiotic competence is likely reflected in larger genome sizes of symbiotic Nostoc strains. Some of the identified genes are presumably involved in the initial recognition and establishment of the symbiotic association, while others may confer advantage to cyanobionts during cohabitation with a mycobiont in the lichen symbiosis. Conclusions Our study presents the first genome sequencing and genome-scale analysis of lichen-associated Nostoc strains. These data provide insight into the molecular nature of the cyanolichen symbiosis and pinpoint candidate genes for further studies aimed at deciphering the genetic mechanisms behind the symbiotic competence of Nostoc. Since many phylogenetic studies have shown that Nostoc is a polyphyletic group that includes several lineages, this work also provides an improved molecular basis for demarcation of a Nostoc clade with symbiotic competence.
dc.description.sponsorship This research was funded by the Icelandic Research Fund RANNIS (project number 134055-051) and by the University of Iceland. Sample collection, study design, analysis, data interpretation and manuscript writing was carried out by the authors.
dc.format.extent 434
dc.language.iso en
dc.publisher Springer Nature
dc.relation.ispartofseries BMC Genomics;19(1)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Cyanobacteria
dc.subject Nostoc
dc.subject Lichen
dc.subject Symbiosis
dc.subject Symbiotic competence
dc.subject Gerlar
dc.subject Samlífi
dc.subject Fléttur (plöntur)
dc.title Distinctive characters of Nostoc genomes in cyanolichens
dc.type info:eu-repo/semantics/article
dcterms.license This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
dc.description.version Peer Reviewed
dc.identifier.journal BMC Genomics
dc.identifier.doi 10.1186/s12864-018-4743-5
dc.relation.url http://link.springer.com/content/pdf/10.1186/s12864-018-4743-5.pdf
dc.contributor.department Líf- og umhverfisvísindadeild (HÍ)
dc.contributor.department Faculty of Life and Environmental Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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