Predicted to enable identical protein binding activity. Involved in several processes, including cellular localization; regulation of cell growth; and regulation of cell size. Located in endoplasmic reticulum exit site and mitochondrion. Expressed in germ line; hypodermis; intestine; and muscle cell. Human ortholog(s) of this gene implicated in hereditary spastic paraplegia 57. Is an ortholog of human TFG (trafficking from ER to golgi regulator).