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Galactose-1-phosphate thymidylyltransferase

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galactose-1-phosphate thymidylyltransferase
Identifiers
EC no.2.7.7.32
CAS no.9023-25-0
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
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In enzymology, a galactose-1-phosphate thymidylyltransferase (EC 2.7.7.32) is an enzyme that catalyzes the chemical reaction

dTTP + alpha-D-galactose 1-phosphate {\displaystyle \rightleftharpoons } diphosphate + dTDP-galactose

Thus, the two substrates of this enzyme are dTTP and alpha-D-galactose 1-phosphate, whereas its two products are diphosphate and dTDP-galactose.

This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). The systematic name of this enzyme class is dTTP:alpha-D-galactose-1-phosphate thymidylyltransferase. Other names in common use include dTDP galactose pyrophosphorylase, galactose 1-phosphate thymidylyl transferase, thymidine diphosphogalactose pyrophosphorylase, thymidine triphosphate:alpha-D-galactose 1-phosphate, and thymidylyltransferase. This enzyme participates in nucleotide sugars metabolism.

References

  • Pazur JH, Anderson JS (October 1963). "Thymidine triphosphate: alpha-D-galactose 1-phosphate thymidylyltransferase from Streptococcus faecalis grown on D-galactose". The Journal of Biological Chemistry. 238: 3155–60. PMID 14085355.
Transferases: phosphorus-containing groups (EC 2.7)
2.7.1-2.7.4:
phosphotransferase/kinase
(PO4)
2.7.1: OH acceptor
2.7.2: COOH acceptor
2.7.3: N acceptor
2.7.4: PO4 acceptor
2.7.6: diphosphotransferase
(P2O7)
2.7.7: nucleotidyltransferase
(PO4-nucleoside)
Polymerase
DNA polymerase
DNA-directed DNA polymerase
I/A
γ
θ
ν
T7
Taq
II/B
α
δ
ε
ζ
Pfu
III/C
IV/X
β
λ
μ
TDT
V/Y
η
ι
κ
RNA-directed DNA polymerase
Reverse transcriptase
Telomerase
RNA polymerase
Template-directed
RNA polymerase I
II
III
IV
V
ssRNAP
POLRMT
Primase
1
2
PrimPol
RNA-dependent RNA polymerase
Polyadenylation
PAP
PNPase
Phosphorolytic
3' to 5' exoribonuclease
Nucleotidyltransferase
Guanylyltransferase
Other
2.7.8: miscellaneous
Phosphatidyltransferases
Glycosyl-1-phosphotransferase
2.7.10-2.7.13: protein kinase
(PO4; protein acceptor)
2.7.10: protein-tyrosine
2.7.11: protein-serine/threonine
2.7.12: protein-dual-specificity
2.7.13: protein-histidine
Enzymes
Activity
Regulation
Classification
Kinetics
Types
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