Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Nat Commun ; 11(1): 1867, 2020 04 20.
Artigo em Inglês | MEDLINE | ID: mdl-32313070

RESUMO

Plant halogenated natural products are rare and harbor various interesting bioactivities, yet the biochemical basis for the involved halogenation chemistry is unknown. While a handful of Fe(II)- and 2-oxoglutarate-dependent halogenases (2ODHs) have been found to catalyze regioselective halogenation of unactivated C-H bonds in bacteria, they remain uncharacterized in the plant kingdom. Here, we report the discovery of dechloroacutumine halogenase (DAH) from Menispermaceae plants known to produce the tetracyclic chloroalkaloid (-)-acutumine. DAH is a 2ODH of plant origin and catalyzes the terminal chlorination step in the biosynthesis of (-)-acutumine. Phylogenetic analyses reveal that DAH evolved independently in Menispermaceae plants and in bacteria, illustrating an exemplary case of parallel evolution in specialized metabolism across domains of life. We show that at the presence of azide anion, DAH also exhibits promiscuous azidation activity against dechloroacutumine. This study opens avenues for expanding plant chemodiversity through halogenation and azidation biochemistry.


Assuntos
Alcaloides/biossíntese , Compostos Ferrosos/metabolismo , Hidrolases/metabolismo , Ácidos Cetoglutáricos/metabolismo , Menispermaceae/metabolismo , Compostos de Espiro/metabolismo , Alcaloides/química , Alcaloides/genética , Bactérias/metabolismo , Biocatálise , Genes de Plantas/genética , Halogenação , Menispermaceae/embriologia , Menispermaceae/genética , Mutagênese , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Proteínas Recombinantes , Metabolismo Secundário/genética , Alinhamento de Sequência , Compostos de Espiro/química , Transcriptoma
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...