Bioactive bis(Indole) alkaloids from a spongosorites sp. sponge

Jae Sung Park, Eunji Cho, Ji Yeon Hwang, Sung Chul Park, Beomkoo Chung, Oh Seok Kwon, Chung J. Sim, Dong Chan Oh, Ki Bong Oh, Jongheon Shin

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18 Scopus citations

Abstract

Six new bis(indole) alkaloids (1–6) along with eight known ones of the topsentin class were isolated from a Spongosorites sp. sponge of Korea. Based on the results of combined spectroscopic analyses, the structures of spongosoritins A–D (1–4) were determined to possess a 2-methoxy-1-imidazole-5-one core connecting the indole moieties, and these were linked by a linear urea bridge for spongocarbamides A (5) and B (6). The absolute configurations of spongosoritins were assigned by electronic circular dichroism (ECD) computation. The new compounds exhibited moderate inhibition against transpeptidase sortase A and weak inhibition against human pathogenic bacteria and A549 and K562 cancer cell lines.

Original languageEnglish
Article number3
JournalMarine Drugs
Volume19
Issue number1
DOIs
StatePublished - Jan 2021
Externally publishedYes

Keywords

  • Bis(indole) alkaloids
  • Sortase A inhibition
  • Spongocarbamides
  • Spongosorites sp. sponge
  • Spongosoritins
  • Topsentin

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