Environmental Engineering Reference
In-Depth Information
4: Hty
5: Val (5, R=H) or
R
allo
-Ile 6
HO
O
NH
N
N
N
H
H
NH
2
O
O
O
N
O
OH
3: MeAla
O
O
1: Lys
6: Arg (5, 6) or Tyr (7)
HN
NH
anabaenopeptin B (5)
anabaenopeptin F (6)
2: Phe
anabaenopeptins B, F
ANABAENA FLOS-AQUAE
BREBISSON EX
BORNET & FLAUHAULT, 1886
Phylum: Cyanobacteria Class: Cyanophyceae
Order: Nostocales Family: Nostocaceae
Distribution: Europe, South America, Africa, Southwest Asia, Central Asia,
Southeast Asia, Australia, New Zealand
Habitat: Freshwater habitats, lakes
Description: This unicellular, microscopic species forms colonies that grow in
ilamentous clumps. The cells have no organized nuclei.
Compounds and activities: The bioactive compounds isolated from this spe-
cies include anatoxin
a
, anabaenopeptins A and B, and microcystin-LR. Of
them, anabaenopeptins A and B have been found to be protease (protein-
phosphatase) inhibitors. The methanol extract of this species containing
the compound 7-methyl heptadecane has shown antibacterial properties
(Ostensvik et al., 1998). Anatoxin
a
, a guanidinemethyl phosphate ester, is
an inhibitor of acetylcholinesterase.
