Probably participates in a plant defense mechanism. Active against Gram-negative bacterium E.coli ATCC 700926 (MIC=0.5 uM) under low-salt conditions (PubMed:27007913). Not active against Gram-positive bacterium S.aureus ATCC 12600 up to a concentration of 100 uM under low-salt conditions (PubMed:27007913). Exhibits immunomodulatory activity but no cytotoxicity in vitro. Expressed in root nodules but not in seed. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. Contains 3 disulfide bonds. This is a cyclic peptide. Belongs to the cyclotide family. Moebius subfamily.