Electrophoresis of nascent proteins
First Claim
1. A method of detecting a marker incorporated into a nascent protein by exposure to an electric field, comprisinga) providing i) tRNA, ii) a marker, iii) an interactive molecule, and iv) a translation system;
- b) aminoacylating said tRNA with said marker containing an alpha-amino acid to create a misaminoacylated tRNA;
c) introducing said misaminoacylated tRNA to said translation system under conditions such that said marker is incorporated into a nascent protein;
d) adding said interactive molecule to said nascent protein to create a mixture; and
e) exposing said mixture to an electric field under conditions such that said marker is detected.
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Abstract
The invention is directed to methods for the non-radioactive labeling, detection, quantitation and isolation of nascent proteins translated in a cellular or cell-free translation system. tRNA molecules are misaminoacylated with non-radioactive markers which may be non-native amino acids, amino acid analogs or derivatives, or substances recognized by the protein synthesizing machinery. Markers may comprise cleavable moieties, detectable labels, reporter properties wherein markers incorporated into protein can be distinguished from unincorporated markers, or coupling agents which facilitate the detection and isolation of nascent protein from other components of the translation system. The invention also comprises proteins prepared using misaminoacylated tRNAs which can be utilized in pharmaceutical compositions for the treatment of diseases and disorders in humans and other maninials, and kits which may be used for the detection of diseases and disorders.
30 Citations
50 Claims
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1. A method of detecting a marker incorporated into a nascent protein by exposure to an electric field, comprising
a) providing i) tRNA, ii) a marker, iii) an interactive molecule, and iv) a translation system; -
b) aminoacylating said tRNA with said marker containing an alpha-amino acid to create a misaminoacylated tRNA;
c) introducing said misaminoacylated tRNA to said translation system under conditions such that said marker is incorporated into a nascent protein;
d) adding said interactive molecule to said nascent protein to create a mixture; and
e) exposing said mixture to an electric field under conditions such that said marker is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of detecting a marker incorporated into a nascent protein by electrophoresis, comprising
a) providing i) tRNA, ii) a marker, iii) an interactive molecule, and iv) a translation system; -
b) aminoacylating said tRNA with said marker containing an alpha-amino acid to create a misaminoacylated tRNA;
c) introducing said misaminoacylated tRNA to said translation system under conditions such that said marker is incorporated into a nascent protein;
d) adding said interactive molecule to said nascent protein to create a mixture; and
e) subjecting said mixture to electrophoresis under conditions such that said marker is detected. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of detecting a marker incorporated into a nascent protein by chromatography, comprising
a) providing i) tRNA, ii) a marker, iii) an interactive molecule, and iv) a translation system; -
b) aminoacylating said tRNA with said marker containing an alpha-amino acid to create a misaminoacylated tRNA;
c) introducing said misaminoacylated tRNA to said translation system under conditions such that said marker is incorporated into a nascent protein;
d) adding said interactive molecule to said nascent protein to create a mixture; and
e) subjecting said mixture to chromatography under conditions such that said marker is detected. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification