anticorps TOP3, anticorps DNA topoisomerase III alpha, anticorps topoisomerase (DNA) III alpha, anticorps Top3a, anticorps TOP3A
Sujet
DNA topoisomerase 3-alpha (TOP3A) is an essential component of the RMI complex, a complex involves in the processing of homologous recombination intermediates to limit DNA crossover formation in cells. It releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand than undergoes passage around the unbroken strand thus removing DNA supercoils.