part of methionyl-tRNA formyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 formylmethionyl-transfer ribonucleic synthetase activity methionyl-tRNA transformylase activity methionyl-transfer ribonucleate methyltransferase activity RHEA:24380 methionyl-transfer RNA transformylase activity conversion of mitochondrial met-tRNAf to fmet-tRNA molecular_function N-terminal peptidyl-methionine N-formylation Catalysis of the reaction: 10-formyltetrahydrofolate + L-methionyl-tRNA + H2O = tetrahydrofolate + N-formylmethionyl-tRNA. GO:0070128 EC:2.1.2.9 methionyl-tRNA Met formyltransferase activity 10-formyltetrahydrofolate:L-methionyl-tRNA N-formyltransferase activity N10-formyltetrahydrofolic-methionyl-transfer ribonucleic transformylase activity GO:0004479 conversion of met-tRNAf to fmet-tRNA N(10)-formyltetrahydrofolic-methionyl-transfer ribonucleic transformylase activity methionyl-transfer ribonucleic transformylase activity MetaCyc:METHIONYL-TRNA-FORMYLTRANSFERASE-RXN mitochondrial N-terminal peptidyl-methionine N-formylation methionyl ribonucleic formyltransferase activity Reactome:R-HSA-5389841 GO:0001718 translational initiation hydroxymethyl-, formyl- and related transferase activity conversion of methionyl-tRNA to N-formyl-methionyl-tRNA catalytic activity, acting on a tRNA