Characterization of carotenoids in Rhodothermus marinus
Rhodothermus marinus, a marine aerobic thermophile, was first isolated from an intertidal hot spring in Iceland. In recent years, the R. marinus strain PRI 493 has been genetically modified, which opens up possibilities for targeted metabolic engineering of the species, such as of the carotenoid bio...
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ftpubmed:oai:pubmedcentral.nih.gov:5822342 2023-05-15T16:51:25+02:00 Characterization of carotenoids in Rhodothermus marinus Ron, Emanuel Y. C. Plaza, Merichel Kristjansdottir, Thordis Sardari, Roya R. R. Bjornsdottir, Snaedis H. Gudmundsson, Steinn Hreggvidsson, Gudmundur Oli Turner, Charlotta van Niel, Ed W. J. Nordberg‐Karlsson, Eva 2017-10-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5822342/ http://www.ncbi.nlm.nih.gov/pubmed/29045010 https://doi.org/10.1002/mbo3.536 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5822342/ http://www.ncbi.nlm.nih.gov/pubmed/29045010 http://dx.doi.org/10.1002/mbo3.536 © 2017 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Original Research Text 2017 ftpubmed https://doi.org/10.1002/mbo3.536 2018-03-04T01:37:46Z Rhodothermus marinus, a marine aerobic thermophile, was first isolated from an intertidal hot spring in Iceland. In recent years, the R. marinus strain PRI 493 has been genetically modified, which opens up possibilities for targeted metabolic engineering of the species, such as of the carotenoid biosynthetic pathway. In this study, the carotenoids of the R. marinus type‐strain DSM 4252T, strain DSM 4253, and strain PRI 493 were characterized. Bioreactor cultivations were used for pressurized liquid extraction and analyzed by ultra‐high performance supercritical fluid chromatography with diode array and quadropole time‐of‐flight mass spectrometry detection (UHPSFC‐DAD‐QTOF/MS). Salinixanthin, a carotenoid originally found in Salinibacter ruber and previously detected in strain DSM 4253, was identified in all three R. marinus strains, both in the hydroxylated and nonhydroxylated form. Furthermore, an additional and structurally distinct carotenoid was detected in the three strains. MS/MS fragmentation implied that the mass difference between salinixanthin and the novel carotenoid structure corresponded to the absence of a 4‐keto group on the ß‐ionone ring. The study confirmed the lack of carotenoids for the strain SB‐71 (ΔtrpBΔpurAcrtBI’::trpB) in which genes encoding two enzymes of the proposed pathway are partially deleted. Moreover, antioxidant capacity was detected in extracts of all the examined R. marinus strains and found to be 2–4 times lower for the knock‐out strain SB‐71. A gene cluster with 11 genes in two operons in the R. marinus DSM 4252T genome was identified and analyzed, in which several genes were matched with carotenoid biosynthetic pathway genes in other organisms. Text Iceland PubMed Central (PMC) MicrobiologyOpen 7 1 e00536 |
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Original Research Ron, Emanuel Y. C. Plaza, Merichel Kristjansdottir, Thordis Sardari, Roya R. R. Bjornsdottir, Snaedis H. Gudmundsson, Steinn Hreggvidsson, Gudmundur Oli Turner, Charlotta van Niel, Ed W. J. Nordberg‐Karlsson, Eva Characterization of carotenoids in Rhodothermus marinus |
topic_facet |
Original Research |
description |
Rhodothermus marinus, a marine aerobic thermophile, was first isolated from an intertidal hot spring in Iceland. In recent years, the R. marinus strain PRI 493 has been genetically modified, which opens up possibilities for targeted metabolic engineering of the species, such as of the carotenoid biosynthetic pathway. In this study, the carotenoids of the R. marinus type‐strain DSM 4252T, strain DSM 4253, and strain PRI 493 were characterized. Bioreactor cultivations were used for pressurized liquid extraction and analyzed by ultra‐high performance supercritical fluid chromatography with diode array and quadropole time‐of‐flight mass spectrometry detection (UHPSFC‐DAD‐QTOF/MS). Salinixanthin, a carotenoid originally found in Salinibacter ruber and previously detected in strain DSM 4253, was identified in all three R. marinus strains, both in the hydroxylated and nonhydroxylated form. Furthermore, an additional and structurally distinct carotenoid was detected in the three strains. MS/MS fragmentation implied that the mass difference between salinixanthin and the novel carotenoid structure corresponded to the absence of a 4‐keto group on the ß‐ionone ring. The study confirmed the lack of carotenoids for the strain SB‐71 (ΔtrpBΔpurAcrtBI’::trpB) in which genes encoding two enzymes of the proposed pathway are partially deleted. Moreover, antioxidant capacity was detected in extracts of all the examined R. marinus strains and found to be 2–4 times lower for the knock‐out strain SB‐71. A gene cluster with 11 genes in two operons in the R. marinus DSM 4252T genome was identified and analyzed, in which several genes were matched with carotenoid biosynthetic pathway genes in other organisms. |
format |
Text |
author |
Ron, Emanuel Y. C. Plaza, Merichel Kristjansdottir, Thordis Sardari, Roya R. R. Bjornsdottir, Snaedis H. Gudmundsson, Steinn Hreggvidsson, Gudmundur Oli Turner, Charlotta van Niel, Ed W. J. Nordberg‐Karlsson, Eva |
author_facet |
Ron, Emanuel Y. C. Plaza, Merichel Kristjansdottir, Thordis Sardari, Roya R. R. Bjornsdottir, Snaedis H. Gudmundsson, Steinn Hreggvidsson, Gudmundur Oli Turner, Charlotta van Niel, Ed W. J. Nordberg‐Karlsson, Eva |
author_sort |
Ron, Emanuel Y. C. |
title |
Characterization of carotenoids in Rhodothermus marinus |
title_short |
Characterization of carotenoids in Rhodothermus marinus |
title_full |
Characterization of carotenoids in Rhodothermus marinus |
title_fullStr |
Characterization of carotenoids in Rhodothermus marinus |
title_full_unstemmed |
Characterization of carotenoids in Rhodothermus marinus |
title_sort |
characterization of carotenoids in rhodothermus marinus |
publisher |
John Wiley and Sons Inc. |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5822342/ http://www.ncbi.nlm.nih.gov/pubmed/29045010 https://doi.org/10.1002/mbo3.536 |
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Iceland |
genre_facet |
Iceland |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5822342/ http://www.ncbi.nlm.nih.gov/pubmed/29045010 http://dx.doi.org/10.1002/mbo3.536 |
op_rights |
© 2017 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/mbo3.536 |
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MicrobiologyOpen |
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7 |
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1 |
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e00536 |
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1766041525204025344 |