QUEA_THET8 TTHA1058 S-adenosylmethionine:tRNA ribosyltransferase-isomerase 345 MEGLEAYDYHLPPEQIAQEGVEPRDMARLMVVYREGPFRVAHKRVRDLPEFLRPGDVLVFNESKVIPARLLARKPTGGKVEILLVRERSPGLWEALLGPARKAPPGTRLLLLSPKDLAPVPGLQAEVVAVEEDGVRLLRFQGDLVAHLEEVGEVPLPPYIKAKIPMERYQTVYARRPGSVAAPTAGLHFTPELLERLREMGVELRFLTLHVGPGTFRPVKGDPEKHEMHAEPYAIPEEVAEAVNRAKAEGRRVVAVGTTVVRALESAYREGVGVVAGEGETRLFIRPPYTFKVVDALFTNFHLPRSTLLMLVAAFLGRERTLEAYRLAVAEGYRFYSLGDAMLIL Queuosine biosynthesis protein QueA queA Transfers and isomerizes the ribose moiety from AdoMet to the 7-aminomethyl group of 7-deazaguanine (preQ1-tRNA) to give epoxyqueuosine (oQ-tRNA) (By similarity).