Binds F-actin and nucleates actin assembly. Expressed by cells, when grown on bacterial lawns, or by cells cultured under conditions that give rise to fusion-competent gametes, i.e. in a suspension of bacteria in the dark for 15 hour at 21 degrees Celsius. Does not appear to be expressed by axenically grown vegetative cells or by cells during the asexual, developmental life-cycle induced by removing axenic cells from HL-5 media. In contrast, ponticulin is expressed by vegetative cells and during the early stages of the asexual developmental cycle. Up-regulated in cells that are either actively phagocytosing bacteria or in cells that have been cultured under conditions that promote the generation of cells that are competent to fuse with the opposite mating type during sexual reproduction. The GPI-like-anchor contains a phosphoceramide group, rather than a phosphatidyl group. Belongs to the ponticulin family. The Dictyosteliida are known to produce a glycosylsphingolipidinositol anchor (GPI-like-anchor). It has not been established whether Dictyosteliida make a glycosylphosphatidylinositol anchor (GPI-anchor) also, and whether their GPI-like-anchor modifications can be interconverted with GPI-anchor modifications in a resculpting process. It has not been established that the GPI-like-anchor modification in Dictyosteliida utilizes the same sequence motif.