New pigments from the terrestrial cyanobacterium Scytonema sp. collected on the Mitaraka inselberg, French Guyana - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Natural Products Année : 2004

New pigments from the terrestrial cyanobacterium Scytonema sp. collected on the Mitaraka inselberg, French Guyana

Résumé

Inselbergs are hills rising abruptly from the surrounding plains where cyanobacteria are the only living organisms under conditions of intense solar radiation. A survival mechanism to prevent UV-damage has been associated with synthesis of the ultraviolet-screening, photostable sheath pigment scytonemin. The organic extract of Scytonema sp., collected on the Mitaraka inselberg, French Guyana, yielded three new pigments, tetramethoxyscytonemin (1), dimethoxyscytonemin (2), and scytonine (3), derived from the scytoneman skeleton of scytonemin. These structures were assigned mainly on the basis of (1)H and (13)C NMR and MS experiments.

Domaines

Science des sols
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Dates et versions

hal-00367057 , version 1 (16-08-2010)
hal-00367057 , version 2 (18-08-2010)

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Valérie Bultel-Poncé, Fabienne Félix-Théodose, Corinne Sarthou, Jean-François Ponge, Bernard Bodo. New pigments from the terrestrial cyanobacterium Scytonema sp. collected on the Mitaraka inselberg, French Guyana. Journal of Natural Products, 2004, 67 (4), pp.678-681. ⟨10.1021/np034031u⟩. ⟨hal-00367057v2⟩

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