Overview

Description

  • NatureSynthetic

Specifications

Our Abpromise guarantee covers the use of ab87818 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Purity70 - 90% by HPLC.

  • FormLiquid
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

    Information available upon request.

General info

  • Alternative names
    • damage-specific DNA binding protein 2
    • Damage-specific DNA-binding protein 2
    • DDB p48 subunit
    • Ddb2
    • DDB2_HUMAN
    • DDBb
    • DNA damage-binding protein 2
    • UV-damaged DNA-binding protein 2
    • UV-DDB 2
    • Xeroderma pigmentosum group E protei
    see all
  • FunctionRequired for DNA repair. Binds to DDB1 to form the UV-damaged DNA-binding protein complex (the UV-DDB complex). The UV-DDB complex may recognize UV-induced DNA damage and recruit proteins of the nucleotide excision repair pathway (the NER pathway) to initiate DNA repair. The UV-DDB complex preferentially binds to cyclobutane pyrimidine dimers (CPD), 6-4 photoproducts (6-4 PP), apurinic sites and short mismatches. Also appears to function as the substrate recognition module for the DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complex DDB1-CUL4-ROC1 (also known as CUL4-DDB-ROC1 and CUL4-DDB-RBX1). The DDB1-CUL4-ROC1 complex may ubiquitinate histone H2A, histone H3 and histone H4 at sites of UV-induced DNA damage. The ubiquitination of histones may facilitate their removal from the nucleosome and promote subsequent DNA repair. The DDB1-CUL4-ROC1 complex also ubiquitinates XPC, which may enhance DNA-binding by XPC and promote NER. Isoform D1 and isoform D2 inhibit UV-damaged DNA repair.
  • Tissue specificityUbiquitously expressed; with highest levels in corneal endothelium and lowest levels in brain. Isoform D1 is highly expressed in brain and heart. Isoform D2, isoform D3 and isoform D4 are weakly expressed.
  • PathwayProtein modification; protein ubiquitination.
  • Involvement in diseaseDefects in DDB2 are a cause of xeroderma pigmentosum complementation group E (XP-E) [MIM:278740]; also known as xeroderma pigmentosum V (XP5). XP-E is a rare human autosomal recessive disease characterized by solar sensitivity, high predisposition for developing cancers on areas exposed to sunlight and, in some cases, neurological abnormalities.
  • Sequence similaritiesBelongs to the WD repeat DDB2/WDR76 family.
    Contains 5 WD repeats.
  • DomainThe DWD box is required for interaction with DDB1.
  • Post-translational
    modifications
    Phosphorylation by ABL1 negatively regulate UV-DDB activity.
    Ubiquitinated by CUL4A in response to UV irradiation. Ubiquitination appears to both impair DNA-binding and promotes ubiquitin-dependent proteolysis. Degradation of DDB2 at sites of DNA damage may be a prerequisite for their recognition by XPC and subsequent repair. CUL4A-mediated degradation appears to be promoted by ABL1.
  • Cellular localizationNucleus. Accumulates at sites of DNA damage following UV irradiation.
  • Information by UniProt

References for Human DDB2 peptide (ab87818)

ab87818 has not yet been referenced specifically in any publications.

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