part of microtubule cytoskeleton organization microtubule severing ATPase activity https://github.com/geneontology/go-ontology/issues/23065 https://github.com/geneontology/go-ontology/issues/29690 https://github.com/geneontology/go-ontology/issues/30193 microtubule-severing ATPase activity molecular_function ATP phosphohydrolase (tubulin-dimerizing) GO:0008568 Catalysis of the reaction: ATP + H2O = ADP + phosphate. Catalysis of the severing of a microtubule at a specific spot along its length, coupled to the hydrolysis of ATP. See also the cellular component term 'katanin complex ; GO:0008352'. MetaCyc:3.6.4.3-RXN EC:5.6.1.1 Reactome:R-HSA-9668419 katanin activity polypeptide conformation or assembly isomerase activity catalytic activity, acting on a protein ATP-dependent activity microtubule destabilizing activity