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EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Commentary Reference
Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.160-999 - 200000000 units/mg for recombinant Tpt1 produced in Escherichia coli and 140000000 units/mg for Tpt1 purified from yeast 667569
Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.160-999 - Despite lack of detectable in vitro RNA 2'-phosphotransferase activity in lysates of cells derived from the Trpt1 knockout mice, there is no evidence for a defect in the unfolded protein response or in tRNA function. 690027
Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.160-999 - Immunoprecipitation of Trpt1 from heart lysates, followed by immunoblot with an antiserum raised to bacterially expressed murine Trpt1 reveals that Trpt1-/-mice lack 2'-phosphotransferase activity yet retain the ability to translate spliced transcription factor XBP-1 mRNA and synthesize tyrosine-containing proteins at wild-type levels. Heterozygotes express 50% of wild-type levels. Extracts of Trpt1+/+cells have measurable NAD+-dependent 2'-phosphotransferase activity. 690027
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