[AliceFromHouston]

Making a protein from scratch (as opposed to using a living cell to do so) is still well out of range, AFAIK.

Just putting together a combination of atoms to make a protein does not, unfortunately, make a functional protein; there are many folds and secondary bonds that affect how it functions, and how those form and in what order is very important.

Folding the protein appropriately is probably out of range until we develop more competent 'nanotechnology' (or in more correct terms, until we develop the capability to work more closely on the molecular level), in addition to having a better understanding of how protein folding works and affects functionality.