Cellular localization of clathridimine, an antimicrobial 2-aminoimidazole alkaloid produced by the Mediterranean calcareous sponge Clathrina clathrus.
J Nat Prod
; 73(7): 1277-82, 2010 Jul 23.
Article
em En
| MEDLINE
| ID: mdl-20590100
ABSTRACT
Chemical investigation of the Mediterranean calcareous sponge Clathrina clathrus led to the isolation of large amounts of a new 2-aminoimidazole alkaloid, named clathridimine (1), along with the known clathridine (2) and its zinc complex (3). The structure of the new metabolite was assigned by detailed spectroscopic analysis. Clathridimine (1) displayed selective anti-Escherichia coli and anti-Candida albicans activities. Clathridine (2) showed only anti-Candida albicans activity, and its zinc complex (3) exhibited selective anti-Staphylococcus aureus activity. The isolation of analogues of 2-amino-imidazole derivatives from several Leucetta species from various sites in the Pacific Ocean and the Red Sea raises the question of their biosynthetic origin. Microscopic studies revealed abundant extracellular bacteria located in the mesohyl of the sponge, with two predominant morphotypes including spiral bacteria and long, narrow bacilli. Chemical analysis with HPLC/UV/ELSD profiles of sponge cells separated from bacteria by differential centrifugation and trypsinization of the sponge cell surface revealed that clathridine (2) was localized in the sponge cells.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poríferos
/
Alcaloides
/
Imidazóis
/
Antibacterianos
/
Antifúngicos
Limite:
Animals
Idioma:
En
Revista:
J Nat Prod
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
França