Pro-thiol aryl azide labelling of nucleic acids
First Claim
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1. A pro-thiol aryl azide for coupling a thiol group to a nucleic acid, said pro-thiol aryl azide having the structure:
- ##STR40## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
wherein E comprises an amine and salts thereof, and a chain of C1 -C20 having chain constituents selected from the group consisting of alkyl, alkenyl, alkynyl heteroatoms and salts thereof, said chain constituents having substituents selected from the group consisting of H, C1 -C6 alkyl, aryl, ester, ether, amine, amide, halo groups and salts thereof;
and wherein Y is a group capable of protecting the sulfur moiety from chemical reaction and removable so as to generate a thiol moiety.
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Abstract
Reagents and methods for multi-step labeling of nucleic acids allow the addition of relatively insoluble or unstable labels to nucleic acid in the final step. Nucleic acids can be stored as a stable intermediate capable of reacting with a label conjugated to a thiol-reactive group.
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Citations
15 Claims
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1. A pro-thiol aryl azide for coupling a thiol group to a nucleic acid, said pro-thiol aryl azide having the structure:
- ##STR40## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
wherein E comprises an amine and salts thereof, and a chain of C1 -C20 having chain constituents selected from the group consisting of alkyl, alkenyl, alkynyl heteroatoms and salts thereof, said chain constituents having substituents selected from the group consisting of H, C1 -C6 alkyl, aryl, ester, ether, amine, amide, halo groups and salts thereof; and wherein Y is a group capable of protecting the sulfur moiety from chemical reaction and removable so as to generate a thiol moiety. - View Dependent Claims (2, 3, 4, 5)
- ##STR40## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
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6. A covalent conjugate of a nucleic acid and a thiol-reactive label having a thiol-reactive group given by the structure:
- ##STR44## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
wherein E comprises an amine and salts thereof, and a chain of C1 -C20 having chain constituents selected from the group consisting of alkyl, alkenyl, alkynyl heteroatoms and salts thereof, said chain constituents having substituents selected from the group consisting of H, C1 -C6 alkyl, aryl, ester, ether, amine, amide, halo groups and salts thereof; wherein R9 is the thiolated conjugate of the thiol-reactive group in the thio-reactive label; and wherein L is selected from the group consisting of a ligand or a detectable label. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
- ##STR44## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
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14. A pro-thiol aryl azide for coupling a thiol group to a nucleic acid, said pro-thiol aryl azide having the structure:
- ##STR46## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
wherein E is;
##STR47## and Y is;
##STR48##
- ##STR46## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
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15. A covalent conjugate of a nucleic acid and a thiol-reactive label having a thiol-reactive group given by the structure:
- ##STR49## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
wherein E is;
##STR50## wherein R9 is the thiolated conjugate of the thiol-reactive group in the thio-reactive label; andwherein L is selected from the group consisting of a ligand or a detectable label.
- ##STR49## wherein, R1 to R4, which may be the same or different, are selected from the group consisting of H, alkyl, nitro, hydroxy, halide, carboxylic acid, methoxy, cyano, amino groups and salts thereof;
Specification