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Human apurinic/apyrimidinic endonuclease (APE1) with product DNA and Mg2+
Biology and Chemistry Report
4IEM
  •   Structure Details   Hide

    Structure Keywords

    Keywords HYDROLASE, LYASE/DNA
    Text metalloprotein, DNA damage, DNA repair, base excision repair, protein-DNA, REF1, nuclease, HYDROLASE, LYASE-DNA complex

    Polymeric Molecules

    Chain A,B,C,D
    Description DNA-(apurinic or apyrimidinic site) lyase 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 35475.6 
    Source Method genetically manipulated  
    Entity Name APEX nuclease, APEN, Apurinic-apyrimidinic endonuclease 1, AP endonuclease 1, APE-1, REF-1, Redox factor-1, DNA-(apurinic or apyrimidinic site) lyase, mitochondrial 
    Chain E,H,K,N
    Description DNA (5'-D(*GP*CP*TP*AP*C)-3') 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polydeoxyribonucleotide 
    Formula Weight 1480.0 
    Source Method synthetic  
    Chain F,I,L,O
    Description DNA (5'-D(P*(3DR)P*GP*AP*TP*CP*G)-3') 
    Nonstandard Linkage no 
    Nonstandard Monomers yes 
    Polymer Type polydeoxyribonucleotide 
    Formula Weight 1700.2 
    Source Method synthetic  
    Chain G,J,M,P
    Description DNA (5'-D(*CP*GP*AP*TP*CP*GP*GP*TP*AP*GP*C)-3') 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polydeoxyribonucleotide 
    Formula Weight 3374.2 
    Source Method synthetic  

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    MG  MAGNESIUM ION  Mg   24.31  View 
    NA  SODIUM ION  Na   22.99  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,B,C,D APEX1_HUMAN P27695     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    A B C D  3.1      
    A B C D  4.2.99.18      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,B,C,D
    GO ID   Ontology GO Term Definition
    6281   DNA Repair  The Process of Restoring DNA After Damage. Genomes Are Subject to Damage by Chemical and Physical Agents in the Environment (e.g. Uv and Ionizing Radiations Chemical Mutagens Fungal and Bacterial Toxins Etc.) and by Free Radicals or Alkylating Agents Endogenously Generated in Metabolism. DNA Is Also Damaged Because of Errors During Its Replication. a Variety of Different DNA Repair Pathways Have Been Reported That Include Direct Reversal Base Excision Repair Nucleotide Excision Repair Photoreactivation Bypass Double Strand Break Repair Pathway and Mismatch Repair Pathway. 
    6310   DNA Recombination  Any Process in Which a New Genotype Is Formed by Reassortment of Genes Resulting in Gene Combinations Different From Those That Were Present in the Parents. in Eukaryotes Genetic Recombination Can Occur by Chromosome Assortment Intrachromosomal Recombination or Nonreciprocal Interchromosomal Recombination. Intrachromosomal Recombination Occurs by Crossing Over. in Bacteria It May Occur by Genetic Transformation Conjugation Transduction or F Duction. 
    6351   Transcription DNA Templated  The Cellular Synthesis of RNA On a Template of Dna. 
    6355   Regulation of Transcription DNA Templated  Any Process That Modulates the Frequency Rate or Extent of Cellular DNA Templated Transcription. 
    6974   Cellular Response to DNA Damage Stimulus  Any Process That Results in a Change in State or Activity of a Cell (in Terms of Movement Secretion Enzyme Production Gene Expression Etc.) As a Result of a Stimulus Indicating Damage to Its DNA From Environmental Insults or Errors During Metabolism. 
    90305   Nucleic Acid Phosphodiester Bond Hydrolysis  The Nucleic Acid Metabolic Process in Which the Phosphodiester Bonds Between Nucleotides Are Cleaved by Hydrolysis. 
    5634   Nucleus  A Membrane Bounded Organelle of Eukaryotic Cells in Which Chromosomes Are Housed and Replicated. in Most Cells the Nucleus Contains All of the Cell's Chromosomes Except the Organellar Chromosomes and Is the Site of RNA Synthesis and Processing. in Some Species or in Specialized Cell Types RNA Metabolism or DNA Replication May Be Absent. 
    5730   Nucleolus  A Small Dense Body One or More of Which Are Present in the Nucleus of Eukaryotic Cells. It Is Rich in RNA and Protein Is Not Bounded by a Limiting Membrane and Is Not Seen During Mitosis. Its Prime Function Is the Transcription of the Nucleolar DNA Into 45s Ribosomal Precursor RNA the Processing of This RNA Into 5.8s 18s and 28s Components of Ribosomal RNA and the Association of These Components with 5s RNA and Proteins Synthesized Outside the Nucleolus. This Association Results in the Formation of Ribonucleoprotein Precursors; These Pass Into the Cytoplasm and Mature Into the 40s and 60s Subunits of the Ribosome. 
    5737   Cytoplasm  All of the Contents of a Cell Excluding the Plasma Membrane and Nucleus But Including Other Subcellular Structures. 
    5739   Mitochondrion  A Semiautonomous Self Replicating Organelle That Occurs in Varying Numbers Shapes and Sizes in the Cytoplasm of Virtually All Eukaryotic Cells. It Is Notably the Site of Tissue Respiration. 
    5783   Endoplasmic Reticulum  The Irregular Network of Unit Membranes Visible Only by Electron Microscopy That Occurs in the Cytoplasm of Many Eukaryotic Cells. the Membranes Form a Complex Meshwork of Tubular Channels Which Are Often Expanded Into Slitlike Cavities Called Cisternae. the Er Takes Two Forms Rough (or Granular) with Ribosomes Adhering to the Outer Surface and Smooth (with No Ribosomes Attached). 
    16607   Nuclear Speck  A Discrete Extra Nucleolar Subnuclear Domain 20 50 in Number in Which Splicing Factors Are Seen to Be Localized by Immunofluorescence Microscopy. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3723   RNA Binding  Interacting Selectively and Non Covalently with an RNA Molecule or a Portion Thereof. 
    4518   Nuclease Activity  Catalysis of the Hydrolysis of Ester Linkages Within Nucleic Acids. 
    4519   Endonuclease Activity  Catalysis of the Hydrolysis of Ester Linkages Within Nucleic Acids by Creating Internal Breaks. 
    4527   Exonuclease Activity  Catalysis of the Hydrolysis of Ester Linkages Within Nucleic Acids by Removing Nucleotide Residues From the 3' or 5' End. 
    5515   Protein Binding  Interacting Selectively and Non Covalently with Any Protein or Protein Complex (a Complex of Two or More Proteins That May Include Other Nonprotein Molecules). 
    16787   Hydrolase Activity  Catalysis of the Hydrolysis of Various Bonds E.g. C O C N C C Phosphoric Anhydride Bonds Etc. Hydrolase Is the Systematic Name For Any Enzyme of EC Class 3. 
    16829   Lyase Activity  Catalysis of the Cleavage of C C C O C N and Other Bonds by Other Means Than by Hydrolysis or Oxidation or Conversely Adding a Group to a Double Bond. They Differ From Other Enzymes in That Two Substrates Are Involved in One Reaction Direction But Only One in the Other Direction. When Acting On the Single Substrate a Molecule Is Eliminated and This Generates Either a New Double Bond or a New Ring. 
    46872   Metal Ion Binding  Interacting Selectively and Non Covalently with Any Metal Ion. 


     
  •   Gene Details   Hide

    Genetic Source

    Chain A,B,C,D
    Common Name Human
    Scientific Name Homo sapiens  
    Gene ape, ape1, apex, apex1, apx, hap1, ref1
    Host Scientific Name Escherichia coli  


    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    14 14q11.2 328     APEX nuclease (multifunctional DNA repair enzyme) 1 APEX1