GPN3 encodes the human gene, GPN-loop GTPase 3. It may also be known as: ATP-binding domain 1 family member C; ATPBD1C. The encoded protein has an amino acid length of 284 and a mass of 32.8 kDa. Other isoforms may exist. GPN3 is a member of the GPN-loop GTPase family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.