Abstract
The molecular mechanism of N7-methylguanosine (m7G)-tRNA modification mediated by the methyltransferase like 1-WD repeat domain 4 (METTL1-WDR4). Route A indicated that with WDR4 as the scaffold, METTL1 catalyzed G46 methylation modification after binding of the tRNA variable loop via its αC and α6 helices, as reported by Richard I. Gregory's group. Route B showed the METTL1-WDR4-mediated tRNA methylation modification model and the effect of binding of the S-adenosylmethionine on the N-terminus of METTL1, as reported by Yunsun Nam's group.
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