The invention relates to an artificial
nucleic acid molecule comprising at least one
open reading frame and at least one 3-
untranslated region element (3′-UTR element) and / or at least one 5-
untranslated region element (5′-UTR element), wherein said artificial
nucleic acid molecule is characterized by high translation efficiency. The translation efficiency is contributed, at least in part, by the 5′-UTR element or the 3′-UTR element, or both of the 5′-UTR element and the 3′-UTR element. The invention further relates to the use of such an artificial
nucleic acid molecule in
gene therapy and / or
genetic vaccination. Furthermore, novel 3′-UTR elements and 5′-UTR elements are provided.