transmembrane protein transporter activity proton motive force dependent protein transmembrane transporter activity Catalysis of the transfer of proteins from one side of a membrane to the other. Transportation is dependent on pH gradient across the membrane. arginine targeting transmembrane transporter activity GO:0015557 twin-arginine targeting transmembrane transporter activity pH-dependent protein transporter activity delta-pH-dependent protein transporter activity GO:0009977 molecular_function secondary active transmembrane transporter activity