Abstract
Jizanpeptins A-E (1-5) are micropeptin depsipeptides isolated from a Red Sea specimen of a Symploca sp. cyanobacterium. The planar structures of the jizanpeptins were established using NMR spectroscopy and mass spectrometry and contain 3-amino-6-hydroxy-2-piperidone (Ahp) as one of eight residues in a typical micropeptin motif, as well as a side chain terminal glyceric acid sulfate moiety. The absolute configurations of the jizanpeptins were assigned using a combination of Marfey's methodology and chiral-phase HPLC analysis of hydrolysis products compared to commercial and synthesized standards. Jizanpeptins A-E showed specific inhibition of the serine protease trypsin (IC50 = 72 nM to 1 mu M) compared to chymotrypsin (IC50 = 1.4 to >10 mu M) in vitro and were not overtly cytotoxic to HeLa cervical or NCI-H460 lung cancer cell lines at micromolar concentrations.
Original language | English |
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Pages (from-to) | 1417-1425 |
Number of pages | 9 |
Journal | Journal of Natural Products |
Volume | 81 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2018 |
Externally published | Yes |
Keywords
- Marine cyanobacterium
- Serine-protease
- Vibrio-cholerae
- Moorea-producens
- High-throughput
- Microcystis-aeruginosa
- Lyngbya-confervoides
- Elastase inhibitors
- Cyclic depsipeptide
- Fresh-water