ENTRY       EC 2.7.7.56
NAME        tRNA nucleotidyltransferase
            Phosphate-dependent exonuclease
            RNase PH
CLASS       Transferases
            Transferring phosphorus-containing groups
            Nucleotidyltransferases
SYSNAME     tRNA:orthophosphate nucleotidyltransferase
REACTION    tRNA(n+1) + Orthophosphate = tRNA(n) + a Nucleoside diphosphate
SUBSTRATE   tRNA(n+1)
            Orthophosphate
PRODUCT     tRNA(n)
            Nucleoside diphosphate
COMMENT     Brings about the final exonucleolytic trimming of the 3'-terminus
            of tRNA precursors in Escherichia coli by a phosphorolysis,
            producing a mature 3'-terminus on tRNA and nucleoside diphosphate.
            Not identical with EC 2.7.7.8.
GENES       MTH: MTH683
            ECO: b3643(rph)
            HIN: HI0273(rph)
            BSU: rph
DBLINKS     University of Geneva ENZYME DATA BANK: 2.7.7.56
            WIT (What Is There) Metabolic Reconstruction: 2.7.7.56
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