Western blot analysis of TOP3B over-expressed 293 cell line, cotransfected with TOP3B Validated Chimera RNAi ( Cat # H00008940-R01V ) (Lane 2) or non-transfected control (Lane 1). Blot probed with TOP3B monoclonal antibody (M01), clone 4F11 (Cat # H00008940-M01 ). GAPDH ( 36.1 kDa ) used as specificity and loading control.
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