Author/Editor		Sepčić, Kristina; Mancini, Ines; Vidic, Iztok; Jovan, Uroš; Frassanito, Rita; Pietra, Francesco; Maček, Peter; Turk, Tom
Title		Antibacterial and anticholinesterase activities of aplysamine-4, a bromotyrosine-derived metabolite of a red sea marine sponge
Type		članek
Source		J Nat Toxins
Vol. and No.		Letnik 10, št. 3
Publication year		2001
Volume		str. 181-91
Language		eng
Abstract		Aplysamine-4, a metabolite of likely bromotyrosine biogenesis, was isolated from an unidentified verongid sponge from the Red Sea. The compound was identified by heteronuclear magnetic resonance experiments, and by electrospray ionization tandem mass spectrometry. The compound exhibited moderate inhibitory activity on several Gram positive and Gram negative bacteria, and was also found to be a non-competitive reversible inhibitor of acetyicholinesterase. At pH 7.4, a K value of 16 and 2 uM was determined with electric eel and insect recombinant acetylcholinesterase, respectively. A deprotonated form of aplysamine-4 was obtained by alkaline treatment of the natural compound and it was shown to be less active than the protonated form.
Descriptors		TYROSINE BROMIDES ACETYLCHOLINESTERASE PORIFERA NUCLEAR MAGNETIC RESONANCE GRAM-POSITIVE BACTERIA GRAM-NEGATIVE BACTERIA COLONY COUNT, MICROBIAL INDIAN OCEAN