Interaction of Cytotoxic Bicyclic Peptides, Theonellamides A and F, with Glutamate Dehydrogenase and 17beta-Hydroxysteroid Dehydrogenase IV.
Mar Biotechnol (NY)
; 2(3): 285-292, 2000 May.
Article
en En
| MEDLINE
| ID: mdl-10852808
ABSTRACT
Theonellamide A, a bicyclic peptide isolated from a Theonella sponge, was fixed on hydrazide-containing gel beads and screened for its binding proteins from rabbit liver tissues. Analysis by sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that two major proteins of 80 kDa and 55 kDa interacted with theonellamide A. The interaction between theonellamide A and two proteins was confirmed by competition experiments in which these two proteins failed to bind to theonellamide A-conjugated gel beads in the presence of theonellamide A or F. Amino-terminal amino acid sequence analysis of peptide fragments derived from the binding proteins by lysylendopeptidase digestion demonstrated that the 80-kDa and 55-kDa proteins were 17beta-hydroxysteroid dehydrogenase IV and glutamate dehydrogenase, respectively. In an in vitro assay system, amination of alpha-ketoglutarate by glutamate dehydrogenase was activated with theonellamide F, although this effect was weaker than that with adenosine diphosphate, a well-known activator.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Mar Biotechnol (NY)
Asunto de la revista:
BIOLOGIA
/
BIOTECNOLOGIA
Año:
2000
Tipo del documento:
Article
País de afiliación:
Japón