Using sortases to install click chemistry handles for protein ligation
First Claim
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1. A method of installing a click chemistry handle to the C-terminus of a target protein, the method comprising the steps of:
- (a) providing a first target protein with a C-terminal sortase recognition sequence, and a second target protein with a C-terminal sortase recognition sequence;
(b) contacting the first target protein with a peptide or agent in the presence of a sortase, wherein the peptide or agent comprises 1-10 N-terminal glycine residues or an N-terminal alkylamine group, and wherein the peptide or agent comprises a first click chemistry handle, thereby producing a first target protein conjugated to the first click chemistry handle, wherein the first click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, phosphines, hydrazides, thiols, tetrazines, and alkenes;
(c) contacting the second target protein with a peptide or agent in the presence of a sortase, wherein the peptide or agent comprises 1-10 N-terminal glycine residues or an N-terminal alkylamine group, and wherein the peptide or agent comprises a second click chemistry handle, thereby producing a second target protein conjugated to the second click chemistry handle, wherein the second click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, phosphines, hydrazides, thiols, tetrazines, and alkenes; and
(d) contacting the first target protein conjugated to the first click chemistry handle of (b) with the second target protein conjugated to the second click chemistry handle of (c), thereby generating a chimeric protein comprising the first target protein and the second target protein.
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Abstract
Methods and reagents for the installation of click chemistry handles on target proteins are provided, as well as modified proteins comprising click chemistry handles. Further, chimeric proteins, for example, bi-specific antibodies, that comprise two proteins conjugated via click chemistry, as well as methods for their generation and use are disclosed herein.
17 Citations
24 Claims
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1. A method of installing a click chemistry handle to the C-terminus of a target protein, the method comprising the steps of:
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(a) providing a first target protein with a C-terminal sortase recognition sequence, and a second target protein with a C-terminal sortase recognition sequence; (b) contacting the first target protein with a peptide or agent in the presence of a sortase, wherein the peptide or agent comprises 1-10 N-terminal glycine residues or an N-terminal alkylamine group, and wherein the peptide or agent comprises a first click chemistry handle, thereby producing a first target protein conjugated to the first click chemistry handle, wherein the first click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, phosphines, hydrazides, thiols, tetrazines, and alkenes; (c) contacting the second target protein with a peptide or agent in the presence of a sortase, wherein the peptide or agent comprises 1-10 N-terminal glycine residues or an N-terminal alkylamine group, and wherein the peptide or agent comprises a second click chemistry handle, thereby producing a second target protein conjugated to the second click chemistry handle, wherein the second click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, phosphines, hydrazides, thiols, tetrazines, and alkenes; and (d) contacting the first target protein conjugated to the first click chemistry handle of (b) with the second target protein conjugated to the second click chemistry handle of (c), thereby generating a chimeric protein comprising the first target protein and the second target protein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of installing a click chemistry handle to the N-terminus of a target protein, the method comprising
(a) providing a first target protein with 1-10 N-terminal glycine residues or an N-terminal alkylamine group; -
(b) contacting the first target protein with a peptide in the presence of a sortase enzyme, wherein the peptide comprises a sortase recognition sequence and a first click chemistry handle, thereby producing a first target protein conjugated to the first click chemistry handle, wherein the first click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, carbonyls, phosphines, hydrazides, thiols, tetrazines, and alkenes; and (c) contacting the first target protein conjugated to the first click chemistry handle of (b) with a second protein conjugated to a second click chemistry handle, thereby generating a chimeric protein comprising the first target protein and the second protein, wherein the second click chemistry handle is selected from the group consisting of terminal alkynes, azides, strained alkynes, dienes, dieneophiles, alkoxyamines, carbonyls, phosphines, hydrazides, thiols, tetrazines, and alkenes. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification