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Dosa: A method to covalently barcode proteins for high-throughput biochemistry.

Ashok Y, Bubb KL, Oy C, Gorjifard S, Cuperus JT, Queitsch C, Fields S
Proc Natl Acad Sci U S A. 2026 Jan 6;123(1):e2529762123. doi: 10.1073/pnas.2529762123. Epub 2026 Jan 2. (Link opens in a new window) PubMed (Link opens in a new window) Article

Plasmids from Article

ID Plasmid Purpose
260641E. coli TrmA (E358Q)Expression of tRNA Crosslinking mutant TrmA (E358Q) in bacteria
260642E.coli TrmA (E358Q, C324A)Expression of dead mutant TrmA (E358Q, C324A) in bacteria
260643pET-LIC-cloning vector (2A-T) No Golden Gate sites BsaI and Esp3ILIC cloning vector with Golden Gate sites BsaI and Esp3I removed
260647pDosa1Cloning vector to express a fusion of a variant protein and a tRNA modifying enzyme TrmA (E358Q) to covalently link an RNA barcode
260649GM6 Aβ(1-42)-pDosa1Bacterial expression of GM6 mutant amyloid beta (1-42) fused to tRNA modifying enzyme TrmA (E358Q)
260650WT MBP-pDosa1Bacterial expression of MBP fused to tRNA modifying enzyme TrmA (E358Q)
260651MBP Y283D-pDosa1Bacterial expression of mutated MBP fused to tRNA modifying enzyme TrmA (E358Q)
260652MBP G32D, I33P-pDosa1Bacterial expression of mutated MBP fused to tRNA modifying enzyme TrmA (E358Q)

Antibodies from Article