A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP.
The specialized metabolite composition of members of the genus Trichodesmium is understudied in comparison to what is known about its ecological role as a dominant nitrogen fixer in oligotrophic tropical and subtropical waters. The occurrence of large surface accumulations, or blooms, comprised of t...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:oa_diss-2386 2023-07-30T04:05:34+02:00 A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. Via, Christopher William 2022-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/oa_diss/1372 https://doi.org/10.23860/diss-via-christopher-2022 https://digitalcommons.uri.edu/context/oa_diss/article/2386/viewcontent/Via_uri_0186A_12822.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/oa_diss/1372 doi:10.23860/diss-via-christopher-2022 https://digitalcommons.uri.edu/context/oa_diss/article/2386/viewcontent/Via_uri_0186A_12822.pdf Open Access Dissertations text 2022 ftunivrhodeislan https://doi.org/10.23860/diss-via-christopher-2022 2023-07-17T19:08:15Z The specialized metabolite composition of members of the genus Trichodesmium is understudied in comparison to what is known about its ecological role as a dominant nitrogen fixer in oligotrophic tropical and subtropical waters. The occurrence of large surface accumulations, or blooms, comprised of these filamentous cyanobacteria is increasing globally and these events contain potentially toxic metabolites. Currently there is a lack of a systematic field and laboratory studies with respect to Trichodesmium spp. metabolic capacity. This study aims to determine the specialized metabolite profile of two members of the Trichodesmium genus examining cultivated specimens and environmental collections (from the Gulf of Mexico and North Atlantic Ocean) of both T. erythraeum and T. thiebautii colonies. Chapter one introduces marine natural products with an emphasis on the halogenated specialized metabolites produced by marine cyanobacteria. In chapter two I utilized bioassay- and mass spectrometry-guided isolation to characterize specialized metabolites from an environmental collection of Trichodesmium thiebautii. Identifying the unique isotopic patterns in molecules containing halogen atoms, I isolated and characterized the structure of a dichlorinated metabolite named trichothiazole A. In Chapter three, I used an untargeted metabolomics approach, namely LC-MS/MS-based molecular networking to visualize the chemical space available in Trichodesmium biomass and to guide the isolation of chlorovinylidene-containing compounds from the same Trichodesmium collection examined in Chapter two. These networks showed the large abundance of highly functionalized metabolites, and two mass spectrometry library hits included the previously characterized smenamides A and B. This led to the isolation and complete characterization of additional smenamide analogs C, D, and E. In Chapter four, I continued to utilize LC-MS/MS-based molecular networking along with other targeted and untargeted mass spectrometry approaches to compare the ... Text North Atlantic University of Rhode Island: DigitalCommons@URI |
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The specialized metabolite composition of members of the genus Trichodesmium is understudied in comparison to what is known about its ecological role as a dominant nitrogen fixer in oligotrophic tropical and subtropical waters. The occurrence of large surface accumulations, or blooms, comprised of these filamentous cyanobacteria is increasing globally and these events contain potentially toxic metabolites. Currently there is a lack of a systematic field and laboratory studies with respect to Trichodesmium spp. metabolic capacity. This study aims to determine the specialized metabolite profile of two members of the Trichodesmium genus examining cultivated specimens and environmental collections (from the Gulf of Mexico and North Atlantic Ocean) of both T. erythraeum and T. thiebautii colonies. Chapter one introduces marine natural products with an emphasis on the halogenated specialized metabolites produced by marine cyanobacteria. In chapter two I utilized bioassay- and mass spectrometry-guided isolation to characterize specialized metabolites from an environmental collection of Trichodesmium thiebautii. Identifying the unique isotopic patterns in molecules containing halogen atoms, I isolated and characterized the structure of a dichlorinated metabolite named trichothiazole A. In Chapter three, I used an untargeted metabolomics approach, namely LC-MS/MS-based molecular networking to visualize the chemical space available in Trichodesmium biomass and to guide the isolation of chlorovinylidene-containing compounds from the same Trichodesmium collection examined in Chapter two. These networks showed the large abundance of highly functionalized metabolites, and two mass spectrometry library hits included the previously characterized smenamides A and B. This led to the isolation and complete characterization of additional smenamide analogs C, D, and E. In Chapter four, I continued to utilize LC-MS/MS-based molecular networking along with other targeted and untargeted mass spectrometry approaches to compare the ... |
format |
Text |
author |
Via, Christopher William |
spellingShingle |
Via, Christopher William A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
author_facet |
Via, Christopher William |
author_sort |
Via, Christopher William |
title |
A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
title_short |
A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
title_full |
A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
title_fullStr |
A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
title_full_unstemmed |
A MULTI-YEAR INVESTIGATION OF THE SPECIALIZED METABOLITE COMPOSITION OF TRICHODESMIUM SPP. |
title_sort |
multi-year investigation of the specialized metabolite composition of trichodesmium spp. |
publisher |
DigitalCommons@URI |
publishDate |
2022 |
url |
https://digitalcommons.uri.edu/oa_diss/1372 https://doi.org/10.23860/diss-via-christopher-2022 https://digitalcommons.uri.edu/context/oa_diss/article/2386/viewcontent/Via_uri_0186A_12822.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Open Access Dissertations |
op_relation |
https://digitalcommons.uri.edu/oa_diss/1372 doi:10.23860/diss-via-christopher-2022 https://digitalcommons.uri.edu/context/oa_diss/article/2386/viewcontent/Via_uri_0186A_12822.pdf |
op_doi |
https://doi.org/10.23860/diss-via-christopher-2022 |
_version_ |
1772817575219036160 |