Protein found in or associated with a host cell projection, a host cell protrusion such as pseudopodium, filopodium, lamellipodium, growth cone, flagellum, acrosome, axon, pili or bacterial comet tail. These membrane-cytoskeleton-coupled processes are involved in many biological functions, such as host cell motility, cancer-cell invasion, endocytosis, phagocytosis, exocytosis, pathogen infection, neurite extension and cytokinesis.

› Cellular component

› host cell projection [ GO:0044157 ]