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EC 3.2.2.28 Details
EC number
3.2.2.28
Accepted name
double-stranded uracil-DNA glycosylase
Reaction
Specifically hydrolyses mismatched double-stranded DNA and polynucleotides, releasing free uracil
Other name(s)
Mug,
double-strand uracil-DNA glycosylase,
Dug,
dsUDG,
double-stranded DNA specific UDG,
dsDNA specific UDG,
UdgB (ambiguous),
G:T/U mismatch-specific DNA glycosylase,
UDG (ambiguous)
Systematic name
uracil-double-stranded DNA deoxyribohydrolase (uracil-releasing)
Comment
No activity on DNA containing a T/G mispair or single-stranded DNA containing either a site-specific uracil or 3,N4-ethenocytosine residue [2], significant role for double-stranded uracil-DNA glycosylase in mutation avoidance in non-dividing E. coli [3]. Uracil-DNA glycosylases are widespread enzymes that are found in all living organisms. Uracil-DNA glycosylase (EC 3.2.2.27) and EC 3.2.2.28 form a central part of the DNA-repair machinery since they initiate the DNA base-excision repair pathway by hydrolysing the N-glycosidic bond between uracil and the deoxyribose sugar thereby catalysing the removal of mis-incorporated uracil from DNA.
History
created 2009
EC Tree
3.2.2.18 created 1984, deleted 1989