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Unprecedented sculpting of DNA at abasic sites by DNA glycosylase homolog Mag2
Biology and Chemistry Report
4B24
  •   Structure Details   Hide

    Structure Keywords

    Keywords HYDROLASE/DNA
    Text HYDROLASE-DNA COMPLEX, HELIX-HAIRPIN-HELIX

    Polymeric Molecules

    Chain A
    Description PROBABLE DNA-3-METHYLADENINE GLYCOSYLASE 2 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 26362.3 
    Source Method genetically manipulated  
    Entity Name MAG2\,3-METHYLADENINE DNA GLYCOSIDASE, 2\,3MEA DNA GLYCOSYLASE 2 
    Chain X
    Description 5'-D(*GP*CP*TP*AP*CP*3DRP*TP*AP*TP*CP*GP)-3' 
    Nonstandard Linkage no 
    Nonstandard Monomers yes 
    Polymer Type polydeoxyribonucleotide 
    Formula Weight 3200.1 
    Source Method synthetic  
    Chain Y
    Description 5'-D(*CP*GP*AP*TP*AP*GP*GP*TP*AP*GP)-3' 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polydeoxyribonucleotide 
    Formula Weight 3109.1 
    Source Method synthetic  

     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A MAG2_SCHPO O94468     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    3.2.2.21      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A
    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. 
    6284   Base Excision Repair  In Base Excision Repair an Altered Base Is Removed by a DNA Glycosylase Enzyme Followed by Excision of the Resulting Sugar Phosphate. the Small Gap Left in the DNA Helix Is Filled in by the Sequential Action of DNA Polymerase and DNA Ligase. 
    6285   Base Excision Repair Ap Site Formation  The Formation of an Ap Site a Deoxyribose Sugar with a Missing Base by DNA Glycosylase Which Recognizes an Altered Base in DNA and Catalyzes Its Hydrolytic Removal. This Sugar Phosphate Is the Substrate Recognized by the Ap Endonuclease Which Cuts the DNA Phosphodiester Backbone At the 5' Side of the Altered Site to Leave a Gap Which Is Subsequently Repaired. 
    6307   DNA Dealkylation Involved in DNA Repair  The Repair of Alkylation Damage E.g. the Removal of the Alkyl Group At the O6 Position of Guanine by O6 Alkylguanine DNA Alkyltransferase (agt). 
    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. 
    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. 
    3824   Catalytic Activity  Catalysis of a Biochemical Reaction At Physiological Temperatures. in Biologically Catalyzed Reactions the Reactants Are Known As Substrates and the Catalysts Are Naturally Occurring Macromolecular Substances Known As Enzymes. Enzymes Possess Specific Binding Sites For Substrates and Are Usually Composed Wholly or Largely of Protein But RNA That Has Catalytic Activity (ribozyme) Is Often Also Regarded As Enzymatic. 
    3905   Alkylbase DNA N Glycosylase Activity  Catalysis of the Reaction: DNA with Alkylated Base + H2o = DNA with Abasic Site + Alkylated Base. This Reaction Is the Hydrolysis of DNA by Cleavage of the N C1' Glycosidic Bond Between the Target Damaged DNA Base and the Deoxyribose Sugar to Remove an Alkylated Base Leaving an Apyrimidinic or Apurinic Site. 
    8725   DNA 3 Methyladenine Glycosylase Activity  Catalysis of the Reaction: DNA Containing 3 Methyladenine + H2o = DNA with Abasic Site + 3 Methyladenine. This Reaction Is the Hydrolysis of DNA by Cleavage of the N C1' Glycosidic Bond Between the Damaged DNA 3 Methyladenine and the Deoxyribose Sugar to Remove the 3 Methyladenine Leaving an Abasic Site. 
    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. 
    19104   DNA N Glycosylase Activity  Catalysis of the Removal of Damaged Bases by Cleaving the N C1' Glycosidic Bond Between the Target Damaged DNA Base and the Deoxyribose Sugar. the Reaction Releases a Free Base and Leaves an Apurinic/apyrimidinic (ap) Site. 
    43916   DNA 7 Methylguanine Glycosylase Activity  Catalysis of the Reaction: DNA Containing 7 Methylguanine + H2o = DNA with Abasic Site + 7 Methylguanine. This Reaction Is the Hydrolysis of DNA by Cleavage of the N C1' Glycosidic Bond Between the Damaged DNA 7 Methylguanine and the Deoxyribose Sugar to Remove the 7 Methylguanine Leaving an Abasic Site. 
    52821   DNA 7 Methyladenine Glycosylase Activity  Catalysis of the Reaction: DNA Containing 7 Methyladenine + H2o = DNA with Abasic Site + 7 Methyladenine. This Reaction Is the Hydrolysis of DNA by Cleavage of the N C1' Glycosidic Bond Between the Damaged DNA 7 Methyladenine and the Deoxyribose Sugar to Remove the 7 Methyladenine Leaving an Abasic Site. 
    52822   DNA 3 Methylguanine Glycosylase Activity  Catalysis of the Reaction: DNA Containing 3 Methylguanine + H2o = DNA with Abasic Site + 3 Methylguanine. This Reaction Is the Hydrolysis of DNA by Cleavage of the N C1' Glycosidic Bond Between the Damaged DNA 3 Methylguanine and the Deoxyribose Sugar to Remove the 3 Methylguanine Leaving an Abasic Site. 


     
  •   Gene Details   Hide

    Genetic Source

    Chain A
    Scientific Name Schizosaccharomyces pombe  
    Host Scientific Name Escherichia coli  
    Host Strain Bl21
    Host Vector Pet28
    Host Vector Type Plasmid


    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    II - 2540646     DNA-3-methyladenine glycosidase Mag2 MAG2