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Accumulation of cyanobacterial oxadiazine nocuolin A is enhanced by temperature shift during cultivation and is promoted by bacterial co-habitants in the culture
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SYSNO ASEP 0509023 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Accumulation of cyanobacterial oxadiazine nocuolin A is enhanced by temperature shift during cultivation and is promoted by bacterial co-habitants in the culture Author(s) Chmelík, Dominik (UEK-B) SAI
Hrouzek, P. (CZ)
Fedorko, Jan (UEK-B) SAI, ORCID
Vu, D.L. (CZ)
Urajová, P. (CZ)
Mareš, J. (CZ)
Červený, Jan (UEK-B) RID, ORCID, SAIArticle number 101673 Source Title Algal Research-Biomass Biofuels and Bioproducts. - : Elsevier - ISSN 2211-9264
Roč. 44, dec (2019)Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords axenization ; secondary metabolite ; nocuolin a, culture ; culture ; cyanobacteria Subject RIV EF - Botanics OECD category Plant sciences, botany R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015055 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS II - 90061 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Open access with time embargo (01.12.2021) Institutional support UEK-B - RVO:86652079 UT WOS 000498792900001 EID SCOPUS 85075030455 DOI 10.1016/j.algal.2019.101673 Annotation Proper setting of cultivation conditions is essential for production of high-value compounds in microbial biotechnology. The present study characterizes photoautotrophic growth and capacity to accumulate the antiproliferative secondary metabolite Nocuolin A (NoA) in cyanobacterium Nostoc sp. CCAP 1453/38. As the cyanobacterial culture was found to be non-axenic, the bacteria accompanying the culture were characterized, then the growth demands and NoA production in the Nostoc-bacterial consortium were determined, and finally an axenic strain was prepared. For the purposes of growth characterization, the culture was maintained in a quasi-continuous regime under various light intensities, temperatures, and inorganic carbon concentrations in a small-scale laboratory photobioreactor. The maximum biomass growth rate obtained was 0.10 h-1 (doubling time Dt = 6.93 h). As the temperature optima for the biomass production and for NoA accumulation differed, biphasic cultivation for maximal NoA yield was designed, leading to a three times more effective cultivation procedure compared to batch culture maintained at a temperature optimal for NoA production. The increased NoA accumulation at reduced temperature that correlated with enhanced expression of NoA biosynthetic genes after the temperature shift suggested its regulation occurs at the expression level. It has further been shown that NoA production is reduced in axenic culture, which indicates that it is also triggered by presence of bacteria. This study shows an example of how a biphasic cultivation mode with different temperatures can be used in high-value compound production processes. It also brings direct evidence that cyanobacterial strain axenization can lead to a rapid decrease in production of valuable compounds and that non-axenic strains may be considered more suitable for retrieval and initial production of novel pharmaceutical leads Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2020 Electronic address https://www.sciencedirect.com/science/article/pii/S2211926419302061?via%3Dihub
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