selenotransferase activity O-phosphoseryl-tRNA(Sec) selenium transferase activity https://github.com/geneontology/go-ontology/issues/30193 https://github.com/geneontology/go-ontology/issues/30815 molecular_function GO:0098621 O-phospho-L-seryl-tRNA(Sec):L-selenocysteinyl-tRNA synthase EC:2.9.1.2 SepSecS Reactome:R-HSA-2408555 O-phosphoseryl-tRNA:selenocysteinyl-tRNA synthase Catalysis of the reaction: O-phospho-L-seryl-tRNA(Sec) + selenophosphate + H2O = L-selenocysteinyl-tRNA(Sec) + 2 phosphate. phosphoseryl-selenocysteinyl-tRNA selenium transferase activity RHEA:25041 catalytic activity, acting on a tRNA