Aprataxin - Q7Z2E3 (APTX_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q7Z2E3: 11
DNA-binding protein involved in single-strand DNA break repair, double-strand DNA break repair and base excision repair (PubMed:15380105, PubMed:15044383, PubMed:16964241, PubMed:17276982, PubMed:24362567). Resolves abortive DNA ligation intermediates formed either at base excision sites, or when DNA ligases attempt to repair non-ligatable breaks induced by reactive oxygen species (PubMed:16964241, PubMed:24362567). Catalyzes the release of adenylate groups covalently linked to 5'-phosphate termini, resulting in the production of 5'-phosphate termini that can be efficiently rejoined (PubMed:16964241, PubMed:17276982, PubMed:24362567). Also able to hydrolyze adenosine 5'-monophosphoramidate (AMP-NH(2)) and diadenosine tetraphosphate (AppppA), but with lower catalytic activity (PubMed:16547001). Likewise, catalyzes the release of 3'-linked guanosine (DNAppG) and inosine (DNAppI) from DNA, but has higher specific activity with 5'-linked adenosine (AppDNA) (By similarity). UniProt
Catalytic Activity
DNA-3'-diphospho-5'-guanosine + H2O = DNA-3'-phosphate + GMP + 2 H+ UniProt
Pathway Maps
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Subunit Structure
Interacts with single-strand break repair proteins XRCC1, XRCC4, ADPRT and p53/TP53 (PubMed:14755728, PubMed:15380105, PubMed:15044383, PubMed:16777843). Interacts with NCL (PubMed:15044383, PubMed:16777843). Interacts (via FHA-like domain) with MDC1 (phosphorylated) (PubMed:20008512). UniProt
The C2H2-type zinc finger mediates DNA-binding. UniProt
  • Isoforms: 13 , currently showing only the 'canonical' sequence.
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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