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EC 2.7.1.160 Details
EC number
2.7.1.160
Accepted name
2′-phosphotransferase
Reaction
2′-phospho-[ligated tRNA] + NAD+ = mature tRNA + ADP-ribose 1′′,2′′-phosphate + nicotinamide
Other name(s)
yeast 2′-phosphotransferase, Tpt1, Tpt1p, 2′-phospho-tRNA:NAD+ phosphotransferase
Systematic name
2′-phospho-[ligated tRNA]:NAD+ phosphotransferase
CAS registry number
126905-00-8
Comment
Catalyses the final step of tRNA splicing in the yeast Saccharomyces cerevisiae [2]. The reaction takes place in two steps: in the first step, the 2′-phosphate on the RNA substrate is ADP-ribosylated, causing the relase of nicotinamide and the formation of the reaction intermediate, ADP-ribosylated tRNA [6]. In the second step, dephosphorylated (mature) tRNA is formed along with ADP ribose 1′′-2′′-cyclic phosphate. Highly specific for oligonucleotide substrates bearing an internal 2′-phosphate. Oligonucleotides with only a terminal 5′- or 3′-phosphate are not substrates [1].
History
created 2006
EC Tree
2.7.1.9 created 1961, deleted 1965
2.7.1.57 created 1972, deleted 1984
2.7.1.70 created 1972, deleted 2004
2.7.1.75 created 1972, deleted 1976
2.7.1.96 created 1978, deleted 1978
2.7.1.97 created 1978, deleted 1992
2.7.1.98 created 1978, deleted 1984
2.7.1.111 created 1984, deleted 1992
2.7.1.133 created 1990, deleted 2002
2.7.1.139 created 1992, deleted 2002
2.7.1.152 created 2002, deleted 2003