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Description for Protein TOP3B

topoisomerase (DNA) III beta
11 total interacting proteins; 4 platelet interacting proteins
Icon Book Platelet Evidence (proteome studies/others : 0/0)
(Not detected in platelets)
Summary:
This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This enzyme catalyzes the transient breaking and rejoining of a single strand of DNA which allows the strands to pass through one another, thus relaxing the supercoils and altering the topology of DNA. The enzyme interacts with DNA helicase SGS1 and plays a role in DNA recombination, cellular aging and maintenance of genome stability. Alternative splicing of the C-terminus of this gene results in three transcript variants which have distinct tissue specificity; however, not all variants have been fully described. [provided by RefSeq] (PubMed Links)
Domains and Motifs:
  • NLS: Nuclear localization signal
    • Gene Ontology:
    Gene Ontology Annotations
    KEGG - Enzyme ID(s):
    5.99.1.2
    KEGG - Orthology:
    K03165
    KEGG - Pathway(s):
    hsa03440
    (The yellow boxes represents platelet proteins)
    Nomenclature / Alternative Names:
    Topoisomerase III beta; TOP3B1; DNA topoisomerase III beta 1
    Approved Symbol:
    TOP3B
    (De-) Phosphorylations:
    Total (de-) phosphorylation sites: 0
    No human (de-) phosphorylation sites; No platelet phosphorylation sites
    Phosphorylation Targets:
    Total phosphorylation targets: 0
    Human phosphorylation targets: 0;Predicted platelet targets: 0
    		Protein Characteristics:
    Isoform-specific Information
    Icon DrugsAssociated Drugs (DrugBank Accession):

    None Available

    Associated Genetic Diseases:

    None Available
    		Predicted Transmembrane Domains:
  • Isoform 1 : 0
    • Additional Identifiers:

    HPRD: 04662 Entrez Gene ID: 8940 OMIM ID: 603582 Swissprot Accession: O95985;