hydrogen ion transmembrane transporter/ protein binding. similar to protein transport protein-related [Arabidopsis thaliana] (TAIR:AT4G27595.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO62148.1); contains InterPro domain ATPase, F1/V1/A1 complex, alpha/beta subunit, C-terminal; (InterPro:IPR000793); contains InterPro domain Prefoldin (InterPro:IPR009053); contains InterPro domain t-SNARE; (InterPro:IPR010989)