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EC 2.7.7.64 Details
EC number
2.7.7.64
Accepted name
UTP-monosaccharide-1-phosphate uridylyltransferase
Reaction
UTP + a monosaccharide 1-phosphate = diphosphate + UDP-monosaccharide
Other name(s)
UDP-sugar pyrophosphorylase, PsUSP
Comment
Requires Mg2+ or Mn2+ for maximal activity. The reaction can occur in either direction and it has been postulated that MgUTP and Mg-diphosphate are the actual substrates [1,2]. The enzyme catalyses the formation of UDP-Glc, UDP-Gal, UDP-GlcA, UDP-L-Ara and UDP-Xyl, showing broad substrate specificity towards monosaccharide 1-phosphates. Mannose 1-phosphate, L-Fucose 1-phosphate and glucose 6-phosphate are not substrates and UTP cannot be replaced by other nucleotide triphosphates [1].
History
created 2006
EC Tree
1.12.7.1 created 1972, deleted 1978
2.7.7.16 created 1961, deleted 1972, [transferred to EC 3.1.4.22, deleted 1980]
2.7.7.17 created 1965, deleted 1972, [transferred to EC 3.1.4.23, deleted 1980]
2.7.7.20 created 1965, deleted 1972
2.7.7.26 created 1961 as EC 3.1.4.8, transferred 1965 to EC 2.7.7.26, deleted 1972
2.7.7.29 created 1972, deleted 2004