(GenBank) thymidine phosphorylase (NP_824541.1| putative thymidine phosphorylase [Streptomyces avermitilis MA-4680]; ZP_00226024.1| COG0213: Thymidine phosphorylase [Kineococcus radiotolerans SRS30216]). THE ENZYMES WHICH CATALYZE THE REVERSIBLE PHOSPHORYLOSIS OF PYRIMIDINE NUCLEOSIDES ARE INVOLVED IN THE DEGRADATION OF THESE COMPOUNDS AND IN THEIR UTILIZATION AS CARBON AND ENERGY SOURCES OR IN THE RESCUE OF PYRIMIDINE BASES FOR NUCLEOTIDE SYNTHESIS. pfam02885, Glycos_trans_3N, Glycosyl transferase family, helical bundle domain. pfam00591,Glycos_transf_3, Glycosyl transferase family, a/b domain. This family includes anthranilate phosphoribosyltransferase (TrpD), thymidine phosphorylase. All these proteins can transfer a phosphorylated ribose substrate.; High confidence in function and specificity