Actinoporin-related protein having hemolytic activity in vitro. Binds probably a phosphocholine derivative with the unique amido or hydroxyl groups found in sphingomyelin. Involved in drought tolerance. Inhibited by sphingomyelin. Very low expression in protonema. Expressed in gametophores, with a maximal level in mature gametophores. Strongly up-regulated by abscisic acid, osmotic stress and drought, up-regulated by wounding, jasmonic acid or salicylic acid and not induced by salt, cold or auxins. The Trp-rich region is important for the binding to lipid membrane. Belongs to the actinoporin family. Plant subfamily.