The Escherichia coli AlkB protein protects against the cytotoxicity of methylating agents by repair of the specific DNA lesions generated in single-stranded DNA. ALKBH2 and ALKBH3 (MIM 610603) are E. coli AlkB homologs that catalyze the removal of 1-methyladenine and 3-methylcytosine (Duncan et al., 2002 [PubMed 12486230]).[supplied by OMIM, Mar 2008],
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Function:
cofactor:Binds 1 Fe(2+) ion per subunit.,enzyme regulation:Activated by ascorbate.,Function:Dioxygenase that repairs alkylated DNA and RNA containing 1-methyladenine and 3-methylcytosine by oxidative demethylation. Has strong preference for double-stranded DNA. Has low efficiency with single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron.,similarity:Belongs to the alkB family.,subcellular location:Detected in replication foci during S-phase.,tissue specificity:Detected in colon, small intestine, ovary, testis, prostate, skeletal muscle, heart, liver and urinary bladder.,
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Cellular Localization:
Nucleus . Nucleus, nucleolus . Nucleus, nucleoplasm . Relocates to the replication foci during S-phase. .
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Tissue Expression:
Detected in colon, small intestine, ovary, testis, prostate, skeletal muscle, heart, liver and urinary bladder.