protein binding / zinc ion binding. similar to protein binding / zinc ion binding [Arabidopsis thaliana] (TAIR:AT4G19700.1); similar to unknown [Populus trichocarpa] (GB:ABK94891.1); contains InterPro domain Zinc finger, RING-type; (InterPro:IPR001841); contains InterPro domain S-ribonuclease binding protein, SBP1, pollen (InterPro:IPR017066)