Other Natural Pigments

Pintea, Adela

doi:10.1201/9781420009286.sec2d

Cited by 5 publications

(5 citation statements)

References 63 publications

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“…These findings suggested that the annotated amino acids and vitamins were essential during all life stages, but mostly during pupation and the adult life stage. Moreover, riboflavin may be the major compound that is responsible for the characteristic yellow-orange color of butterfly wings [54].…”

Section: Resultsmentioning

confidence: 99%

Natural Products Diversity in Plant-Insect Interaction between Tithonia diversifolia (Asteraceae) and Chlosyne lacinia (Nymphalidae)

et al. 2019

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The chemical ecology of plant-insect interactions has been driving our understanding of ecosystem evolution into a more comprehensive context. Chlosyne lacinia (Lepidoptera: Nymphalidae) is an olygophagous insect herbivore, which mainly uses host plants of Heliantheae tribe (Asteraceae). Herein, plant-insect interaction between Tithonia diversifolia (Heliantheae) and Chlosyne lacinia was investigated by means of untargeted LC-MS/MS based metabolomics and molecular networking, which aims to explore its inherent chemical diversity. C. lacinia larvae that were fed with T. diversifolia leaves developed until fifth instar and completed metamorphosis to the adult phase. Sesquiterpene lactones (STL), flavonoids, and lipid derivatives were putatively annotated in T. diversifolia (leaves and non-consumed abaxial surface) and C. lacinia (feces, larvae, pupae, butterflies, and eggs) samples. We found that several furanoheliangolide-type STL that were detected in T. diversifolia were ingested and excreted in their intact form by C. lacinia larvae. Hence, C. lacinia caterpillars may have, over the years, developed tolerance mechanisms for STL throughout effective barriers in their digestive canal. Flavonoid aglycones were mainly found in T. diversifolia samples, while their glycosides were mostly detected in C. lacinia feces, which indicated that the main mechanism for excreting the consumed flavonoids was through their glycosylation. Moreover, lysophospholipids were predominately found in C. lacinia samples, which suggested that they were essential metabolites during pupal and adult stages. These findings provide insights into the natural products diversity of this plant-insect interaction and contribute to uncovering its ecological roles.

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Section: Resultsmentioning

confidence: 99%

Natural Products Diversity in Plant-Insect Interaction between Tithonia diversifolia (Asteraceae) and Chlosyne lacinia (Nymphalidae)

et al. 2019

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“…The connection between the [NAD(P)H]/[NAD (P) ϩ ] ratio and ␤-oxidation is assumed to be due to the cofactor requirement of NAD ϩ for 3-hydroxyacyl-CoA dehydrogenases, which catalyze the third step in ␤-oxidation (10). We also hypothesized the reduced enzyme is oxidized by quinones because they are prevalent redox agents in nature (11,12). To investigate this hypothesis, we experimentally tested NADH, NADPH, and various quinones for catalytic activity.…”

mentioning

confidence: 99%

Functional Annotation of a Presumed Nitronate Monoxygenase Reveals a New Class of NADH:Quinone Reductases

Ball¹,

Salvi²,

Gadda³

2016

Journal of Biological Chemistry

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The protein PA1024 from Pseudomonas aeruginosa PAO1 is currently classified as 2-nitropropane dioxygenase, the previous name for nitronate monooxygenase in the GenBank TM and PDB databases, but the enzyme was not kinetically characterized. In this study, PA1024 was purified to high levels, and the enzymatic activity was investigated by spectroscopic and polarographic techniques. Purified PA1024 did not exhibit nitronate monooxygenase activity; however, it displayed NADH:quinone reductase and a small NADH:oxidase activity. The enzyme preferred NADH to NADPH as a reducing substrate. PA1024 could reduce a broad spectrum of quinone substrates via a Ping Pong Bi Bi steady-state kinetic mechanism, generating the corresponding hydroquinones. The reductive half-reaction with NADH showed a k red value of 24 s ؊1 and an apparent K d value estimated in the low micromolar range. The enzyme was not able to reduce the azo dye methyl red, routinely used in the kinetic characterization of azoreductases. Finally, we revisited and modified the existing six conserved motifs of PA1024, which define a new class of NADH:quinone reductases and are present in more than 490 hypothetical proteins in the GenBank TM , the vast majority of which are currently misannotated as nitronate monooxygenase.

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“…Although the quinones represent a large and heterogeneous class of compounds, the molecules share a common structural feature, in that they all present two ketone groups on a monocyclic or polycyclic aromatic skeleton. The ketone groups may be located in the same or different rings, but carbon-carbon double bond conjugation is required (PINTEA, 2008). Depending on the location of the dione in the common structural pattern, quinones may be classified as benzoquinone, when an ortho or para dione is conjugated to an aromatic nucleus (monocyclic), or as naphthoquinone or anthraquinone, when the conjugation is to a polycyclic aromatic skeleton (Figure 2) (EL-NAJJAR et al, 2011).…”

Section: Quinonesmentioning

confidence: 99%

“…Depending on the location of the dione in the common structural pattern, quinones may be classified as benzoquinone, when an ortho or para dione is conjugated to an aromatic nucleus (monocyclic), or as naphthoquinone or anthraquinone, when the conjugation is to a polycyclic aromatic skeleton (Figure 2) (EL-NAJJAR et al, 2011). The differences between these compounds are due to the length of the hydrophobic side chains, the degree of saturation, and the presence of other groups in addition to the ketones, such as methyl, hydroxyl, methoxyl, or glycosylated phenol groups (NOWICKA; KRUK, 2010;PINTEA, 2008). The naphthoquinones and benzoquinones constitute the great majority of biological isoprenoid quinones (NOWICKA; KRUK, 2010).…”

Section: Quinonesmentioning

confidence: 99%

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Estudos para obtenção de pigmentos vermelhos e azuis de Fusarium oxysporum com potencial aplicação em alimentos

Colombo dos Santos

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pelos membros da Comissão Examinadora, encontra-se no processo de vida acadêmica do aluno. Dedico este trabalho a todas as formas de resistência:LGBTQI+, mulheres, pretos (as), indígenas, periféricos, religiões de matriz africana, nortistas e nordestinos e ao próprio conhecimento científico. A todos os tipos de conhecimento produzido por essas identidades dentro da elitizada Universidade Pública brasileira. Aos poucos artistas brasileiros que não se calam diante da barbárie e dão voz aos oprimidos. A toda forma de ser e estar. AGRADECIMENTOSAgradeço àquelx, que meus olhos não vêem, minhas mãos não tocam, mas que de outras formas sinto, e sei o quanto me acolhe em meus desafios.Ao Conselho Nacional de Desenvolvimento Científico e Tecnológico -CNPq pela concessão da bolsa de estudos e pelo suporte financeiro (Processo nº 141368/2015-2).Ao professor Juliano Lemos Bicas, que muito me ensinou, acolheu e fomentou os lampejos para atravessarmos muitos dos desafios. Admiro muito a sua criatividade, sua dedicação com seus alunos e sua competência.A minha amada mãe Regina Colombo, por todo seu amor, apoio e dedicação. Você é a minha guerreira preferida.A minha cúmplice preciosa, Barbara Santos Wegher, pela inspiração, sopro de alegria e dedicação para tornar essa caminhada mais leve. Obrigada pelo seu amor, colo afável e conselho perspicaz. Admiro sua inteligência, força, sensibilidade e generosidade.Ao meu sobrinho, Arthur Henrique Colombo, que com sua leveza e humor inteligente me consagra momentos reparadores.À minha irmã Karina Colombo dos Santos pelo companheirismo e amor.À minha amiga Marília Crivelari, a pessoa mais generosa e ímpar que conheci na FEA.Ao meu extraordinário amigo Mateus Dias que acompanhou a conclusão dessa fase sendo abundantemente amável e proativo.

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Other Natural Pigments

Cited by 5 publications

References 63 publications

Natural Products Diversity in Plant-Insect Interaction between Tithonia diversifolia (Asteraceae) and Chlosyne lacinia (Nymphalidae)

Natural Products Diversity in Plant-Insect Interaction between Tithonia diversifolia (Asteraceae) and Chlosyne lacinia (Nymphalidae)

Functional Annotation of a Presumed Nitronate Monoxygenase Reveals a New Class of NADH:Quinone Reductases

Estudos para obtenção de pigmentos vermelhos e azuis de Fusarium oxysporum com potencial aplicação em alimentos

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