The nonprotein amino acids 2-amino-3-cyclopropylbutanoic acid and 2-amino-5-chloro-4-pentenoic acid were isolated from the mushroom
Amanita cokeri. The cyclopropyl amino acid is toxic to the fungus
Cercospora kikuchii, the arthropod
Oncopeltus fasciatus (milk weed bug), and the bacteria
Agrobacterium tumefaciens, Erwinia amylovora, and
Xanthomonas campestris. Toxicity to bacteria was reversible by addition of isoleucine to the medium. No toxicity was observed for 2-amino-5-chloro-4-pentenoic acid.
Basidiomyces -
Amanita
-
Lepidella
- 2-amino-3-cyclopropylbutanoic acid - 2-amino-5-chloro-4-pentenoic acid -
Oncopeltus
-
Cercospora
-
Agrobacterium
-
Erwinia
-
Xanthomonas