Nutritive Fragments and Proteins with Low or No Phenylalanine and Methods
Nutritive proteins comprising no phenylalanine (Phe) are provided. In some embodiments the nutritive proteins comprise at least one of a level of a) a ratio of branch chain amino acid residues to total amino acid residues present in the nutritive protein equal to or greater than the ratio of branch chain amino acid residues to total amino acid residues present in a benchmark protein; b) a ratio of leucine residues to total amino acid residues present in the nutritive protein equal to or greater than the ratio of leucine residues to total amino acid residues present in a benchmark protein; and c) a ratio of essential amino acid residues to total amino acid residues present in the nutritive protein equal to or greater than the ratio of essential amino acid residues to total amino acid residues present a benchmark protein. Also provided are nucleic acids encoding the proteins, recombinant microorganisms that make the proteins, methods of making the proteins using recombinant microorganisms, compositions that comprise the proteins, and methods of using the proteins, among other things. The compositions are useful, for example, to provide protein in the diet of subjects with a disorder characterized by accumulation of Phe in the body.
1 .- 159 . (canceled)
160 . An isolated nutritive protein comprising a first polypeptide sequence, wherein the first polypeptide sequence comprises: a. a ratio of Phe residues to total amino acids residues equal to or lower than 5% and/or 10 or fewer Phe residues; and b. a ratio of essential amino acid residues to total amino acid residues of at least 34%.
161 . The isolated nutritive protein of claim 160 , wherein the nutritive protein comprises an aqueous solubility of at least 12.5 g/l at pH7 and/or a simulated gastric digestion half-life of less than 60 minutes.
162 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence is at least 20, 50, or 100 amino acids in length.
163 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence is at least 25 amino acids in length, and wherein the first polypeptide sequence is at least 90% homologous to a fragment at least 25 amino acids in length of a naturally-occurring protein sequence.
164 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence comprises at least one of: a. less than 50 to 90% global homology to a known allergen, b. a calculated solvation score of −20 or less, or c. a calculated aggregation score of 0.75 or less.
165 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence comprises an amino acid sequence selected from: i. an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145; ii. a modified derivative of an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145; and iii. a mutein of an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145.
166 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence consists of an amino acid sequence selected from: i. an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145, ii. a modified derivative of an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145, and iii. a mutein of an amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145.
167 . The isolated nutritive protein of claim 160 , wherein the first polypeptide sequence is at least 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.5% homologous to at least one amino acid sequence selected from SEQ ID NO: 1 to SEQ ID NO: 145.
168 . An nutritive composition comprising the isolated nutritive protein of claim 160 , wherein the nutritive protein is at least 90% pure relative to total protein, and wherein the nutritive composition further comprises at least one component selected from a protein, a polypeptide, a peptide, a free amino acid, a carbohydrate, a lipid, a mineral or mineral source, a vitamin, a supplement, an organism, a pharmaceutical, and an excipient, and/or wherein the nutritive composition is formulated as a food or a food product as a liquid solution, slurry, suspension, gel, paste, powder, or solid, wherein the nutritive composition is optionally formulated for diabetes management and/or protein anabolism.
169 . The isolated nutritive protein of claim 160 , wherein the nutritive protein and/or nutritive composition is supplemented with tyrosine.
170 . An nutritive composition comprising the isolated nutritive protein of claim 160 , wherein the nutritive protein is present in the composition in an amount effective to reduce a defect in an activity of a phenylalanine hydroxylase (PAH) enzyme in a mammalian subject to whom the nutritive composition is administered
171 . A recombinant microorganism comprising a vector comprising a nucleic acid sequence that encodes a nutritive protein according to claim 160 and further comprising an expression control sequence operatively linked to the nucleic acid sequence that encodes the nutritive protein.
172 . A method of making a nutritive protein of claim 160 , comprising isolating the nutritive protein from a recombinant microorganism.
173 . A method of providing dietary protein to a subject with a disorder characterized by accumulation of Phe in the body, comprising providing to the subject the isolated nutritive protein of claim 160 , wherein the subject suffers from phenylketonuria or hyperphenylalaninemia, and optionally protein-energy malnutrition.
174 . The method of claim 173 , wherein the nutritive protein is provided in a sufficient amount to i) induce in the subject a satiation response and/or a satiety response in the subject, and/or increase thermogenesis in the subject.