part of proton channel activity proton motive force-driven ATP synthesis ligase activity proton-transporting ATP synthase activity, rotational mechanism https://github.com/geneontology/go-ontology/issues/19380 https://github.com/geneontology/go-ontology/issues/25727 https://github.com/geneontology/go-ontology/issues/27850 https://github.com/geneontology/go-ontology/issues/28176 https://github.com/geneontology/go-ontology/issues/30815 GO:0046933 Enables the synthesis of ATP from ADP and phosphate by the transfer of protons from one side of a membrane to the other by a rotational mechanism driven by a gradient according to the reaction: ADP + phosphate + 5 H+(out) => ATP + H2O + 4 H+(in). TC:3.A.2.1.1 hydrogen ion transporting ATP synthase activity, rotational mechanism H+-transporting ATP synthase activity Reactome:R-HSA-164832 molecular_function RHEA:57722