Pink- and orange-pigmented Planctomycetes produce saproxanthin-type carotenoids including a rare C-45 carotenoid

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 2019

Autores

Kallscheuer, N (Autor) Outra; Moreira, C (Autor) Outra; Airs, R (Autor) Outra; Llewellyn, CA (Autor) Outra; Wiegand, S (Autor) Outra; Jogler, C (Autor) Outra; lage, om (Autor) FCUP

Revista

Título: Environmental Microbiology Reports

Vol. 11

Páginas: 741-748

ISSN: 1758-2229

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 29 Citações

Scopus - 30 Citações

Outras Informações

ID Authenticus: P-00R-97T

DOI: 10.1111/1758-2229.12796

Abstract (EN): Planctomycetes are ubiquitous and environmentally important Gram-negative aquatic bacteria with key roles in global carbon and nitrogen cycles. Many planctomycetal species have a pink or orange colour and have been suggested to produce carotenoids. Potential applications as food colorants or anti-oxidants have been proposed. Hitherto, the planctomycetal metabolism is largely unexplored and the strain pigmentation has not been explored. For a holistic view of the complex planctomycetal physiology, we analysed carotenoid profiles of the pink-pigmented strain Rhodopirellula rubra LF2(T) and of the orange strain Rubinisphaera brasiliensis Gr7. During LC-MS/MS analysis of culture extracts, we could identify three saproxanthin-type carotenoids including a rare C-45 carotenoid. These compounds, saproxanthin, dehydroflexixanthin and 2 '-isopentenyldehydrosaproxanthin, derive from the common carotenoid precursor lycopene and are characterized by related end groups, namely a 3-hydroxylated beta-carotene-like cyclohexene ring as one end group and simple hydration on the other end of the molecule. Based on the observed molecule structure we present putative pathways for their biosynthesis. Results support Planctomycetes as a promising, yet mostly untapped source of carotenoids.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8