| Literature DB >> 12141855 |
Alexei Ploutno1, Maria Shoshan, Shmuel Carmeli.
Abstract
Two new trypsin inhibitors, micropeptins EI992 (1) and EI964 (2), and a modified linear peptide aeruginosin EI461 (3) were isolated from the hydrophilic extract of two samples of Microcystis aeruginosa, collected from the Einan Reservoir in Israel. Homonuclear and heteronuclear 2D-NMR techniques as well as HRFABMS determined the gross structures of 1-3. The relative and absolute stereochemistry of 1-3 was deduced by a combination of spectral data and Marfey's method for HPLC. Aeruginosin EI461 (3) differs from the 14 known aeruginosins in the relative and absolute stereochemistry of the Choi-6-hydroxyl substituent.Entities:
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Year: 2002 PMID: 12141855 DOI: 10.1021/np010597b
Source DB: PubMed Journal: J Nat Prod ISSN: 0163-3864 Impact factor: 4.050