DNA topoisomerase family protein. similar to DNA topoisomerase III alpha, putative [Arabidopsis thaliana] (TAIR:AT5G63920.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN67233.1); similar to DNA topoisomerase I [alpha proteobacterium BAL199] (GB:ZP_02186840.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO43980.1); contains InterPro domain DNA topoisomerase, type IA, DNA-binding; (InterPro:IPR003602); contains InterPro domain Toprim subdomain; (InterPro:IPR006154); contains InterPro domain DNA topoisomerase, type IA, central region, subdomain 1; (InterPro:IPR013824); contains InterPro domain DNA topoisomerase, type I