Compositions containing, methods involving, and uses of non-natural amino acids and polypeptides
Disclosed herein are compounds useful in the preparation of non-natural amino acids and polypeptides that include at least one non-natural amino acid, and methods for making such non-natural amino acids and polypeptides. The non-natural amino acids, by themselves or as a part of a polypeptide, can include a wide range of possible functionalities, but typical have at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Also disclosed herein are compounds useful in the preparation of non-natural amino acid polypeptides that are further modified post-translationally, methods for effecting such modifications, and methods for purifying such resultant polypeptides. Typically, the modified non-natural amino acid polypeptides include at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Further disclosed are methods for using such non-natural amino acid polypeptides and modified non-natural amino acid polypeptides, including therapeutic, diagnostic, and other biotechnology uses.
1. A compound having the structure selected from:
wherein:
X is a polymer;
L is -(alkylene or substituted alkylene)-N(R′)C(O)O-(alkylene or substituted alkylene)-; and
each R′ is independently H, alkyl, or substituted alkyl.
2. The compound of claim 1 wherein the polymer is a water-soluble polymer.
3. The compound of claim 2 wherein the water-soluble polymer is polyalkylene glycol.
4. The compound of claim 3 wherein the polyalkylene glycol is a polyethylene glycol or a derivative of polyethylene glycol.
5. The compound of claim 4 wherein the polyethylene glycol has a molecular weight selected from the group consisting of about 35,000 Da, about 30,000 Da, about 25,000 Da, about 20,000 Da, about 15,000 Da, about 10,000 Da, about 9,000 Da, about 8,000 Da, about 7,000 Da, about 6,000 Da, about 5,000 Da.
6. The compound of claim 4 wherein the polyethylene glycol has a molecular weight of about 5000 Da to about 30,000 Da.
7. The compound of claim 1 selected from: