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Facts about DNA-(apurinic or apyrimidinic site) lyase.
Functions as a apurinic/apyrimidinic (AP) endodeoxyribonuclease from the DNA base excision repair (BER) pathway of DNA lesions induced by oxidative and alkylating agents. Initiates repair of AP sites in DNA by catalyzing hydrolytic incision of the phosphodiester backbone immediately adjacent to the harm, generating a single-strand break with 5'-deoxyribose phosphate and 3'-hydroxyl ends.
| Human | |
|---|---|
| Gene Name: | APEX1 |
| Uniprot: | P27695 |
| Entrez: | 328 |

| Belongs to: |
|---|
| DNA repair enzymes AP/ExoA family |

AP endonuclease 1; APE; APE1; APE-1; APEAPEX nuclease (multifunctional DNA repair enzyme); APENAP endonuclease class I; APEX deoxyribonuclease (apurinic or apyrimidinic); APEX nuclease (multifunctional DNA repair enzyme) 1; APEX nuclease; APEX1; Apurinic-apyrimidinic endonuclease 1; APXAP lyase; DNA-(apurinic or apyrimidinic site) lyase; EC 3.1; EC 4.2.99.18; HAP1apurinic/apyrimidinic (abasic) endonuclease; multifunctional DNA repair enzyme; protein REF-1; redox factor 1; Redox factor-1; REF1 apurinic/apyrimidinic exonuclease; REF-1
Mass (kDA):
35.555 kDA

| Human | |
|---|---|
| Location: | 14q11.2 |
| Sequence: | 14; NC_000014.9 (20455226..20457767) |
Nucleus. Nucleus, nucleolus. Nucleus speckle. Endoplasmic reticulum. Cytoplasm. Detected in the cytoplasm of B-cells stimulated to switch (By similarity). Colocalized with SIRT1 in the nucleus. Colocalized with YBX1 in nuclear speckles after genotoxic stress. Together with OGG1 is recruited to nuclear speckles in UVA-irradiated cells. Colocalized with nucleolin and NPM1 in the nucleolus. Its nucleolar localization is cell cycle dependent and requires active rRNA transcription. Colocalized with calreticulin in the endoplasmic reticulum. Translocation from the nucleus to the cytoplasm is stimula






PMID: 1719477 by Robson C.N., et al. Isolation of cDNA clones encoding a human apurinic/apyrimidinic endonuclease that corrects DNA repair and mutagenesis defects in E. coli xth (exonuclease III) mutants.
PMID: 1722334 by Demple B., et al. Cloning and expression of APE, the cDNA encoding the major human apurinic endonuclease: definition of a family of DNA repair enzymes.