Marine Biotechnology

, Volume 9, Issue 6, pp 776–785 | Cite as

Antifouling Activity of Bromotyrosine-Derived Sponge Metabolites and Synthetic Analogues

  • Sofia Ortlepp
  • Martin Sjögren
  • Mia Dahlström
  • Horst Weber
  • Rainer Ebel
  • RuAngelie Edrada
  • Carsten Thoms
  • Peter Schupp
  • Lars Bohlin
  • Peter Proksch
Original Article


Eighteen brominated sponge-derived metabolites and synthetic analogues were analyzed for antilarval settlement of Balanus improvisus. Only compounds exhibiting oxime substituents including bastadin-3 (4), −4 (1), −9 (2), and −16 (3), hemibastadin-1 (6), aplysamine-2 (5), and psammaplin A (10) turned out to inhibit larval settling at 1 to 10 μM. Analogues of hemibastadin-1 (6) were synthesized and tested for structure activity studies. Debromohemibastadin-1 (8) inhibited settling of B. improvisus, albeit at lower concentrations than hemibastadin-1 (6). Both 6 and 8 also induced cyprid mortality. 5,5′-dibromohemibastadin-1 (7) proved to be nontoxic, but settlement inhibition was observed at 10 μM. Tyrosinyltyramine (9), lacking the oxime function, was not antifouling active and was non-toxic at 100 μM. Hemibastadin-1 (6) and the synthetic products showed no general toxicity when tested against brine shrimp larvae. In contrast to the lipophilic psammaplin A (10), the hydrophilic sulfated psammaplin A derivative (11) showed no antifouling activity even though it contains an oxime group. We therefore hypothesize that the compound needs to cross membranes (probably by diffusion) and that the target for psammaplin A lies intracellularly.


antifouling Balanus improvisus  bastadins bastadin analogues bromotyrosine derivatives natural products 



We thank BMBF (BiotechMarin) for financial support. C. Thoms acknowledges a Feodor Lynen Fellowship by the Alexander von Humboldt-Foundation, Bonn, Germany and P. Schupp acknowledges support by the National Institutes of Health MBRS SCORE grant S06-GM44796.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Sofia Ortlepp
    • 1
    • 2
  • Martin Sjögren
    • 2
  • Mia Dahlström
    • 3
  • Horst Weber
    • 4
  • Rainer Ebel
    • 1
  • RuAngelie Edrada
    • 1
  • Carsten Thoms
    • 5
  • Peter Schupp
    • 5
  • Lars Bohlin
    • 2
  • Peter Proksch
    • 1
  1. 1.Institute of Pharmaceutical Biology and BiotechnologyHeinrich-Heine UniversityDüsseldorfGermany
  2. 2.Division of Pharmacognosy, Department of Medicinal ChemistryBiomedical Centre Uppsala UniversityUppsalaSweden
  3. 3.Department of Cell and Molecular Biology, Tjärnö Marine Biological LaboratoryGöteborg UniversityStrömstadSweden
  4. 4.Pharmaceutical and Medicinal ChemistryHeinrich-Heine UniversityDüsseldorfGermany
  5. 5.University of Guam Marine LaboratoryMangilaoGuam

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