similar to unknown protein [Arabidopsis thaliana] (TAIR:AT2G32320.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO71745.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN62815.1); contains InterPro domain tRNAHis guanylyltransferase (InterPro:IPR007537)