Probably participates in a plant defense mechanism. Not active against Gram-negative bacterium E.coli ATCC 700926 or Gram-positive bacterium S.aureus ATCC 12600 up to a concentration of 100 uM under low-salt conditions (PubMed:27007913). Expressed in seed but not in root nodules. 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. Bracelet subfamily.