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- W1977736087 abstract "The tRNA modifying enzyme tRNA‐guanine transglycosylase (TGT) is involved in the exchange of guanine in the first position of the anticodon with preQ 1 as part of the biosynthesis of the hypermodified base queuine (Q). Mutation of Ser 90 to an alanine in Escherichia coli TGT leads to a dramatic reduction of enzymatic activity (Reuter, K. et al. (1994) Biochemistry 33, 7041–7046). To further clarify the role of this residue in the catalytic center, we have mutated the corresponding Ser 103 of the crystallizable Zymomonas mobilis TGT into alanine. The crystal structure of a TGT(S103A)/preQ 1 complex combined with biochemical data presented in this paper suggest that Ser 103 is essential for substrate orientation in the TGT reaction." @default.
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- W1977736087 date "1999-07-02" @default.
- W1977736087 modified "2023-09-26" @default.
- W1977736087 title "Mutagenesis and crystallographic studies of<i>Zymomonas mobilis</i>tRNA-guanine transglycosylase to elucidate the role of serine 103 for enzymatic activity" @default.
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- W1977736087 doi "https://doi.org/10.1016/s0014-5793(99)00793-0" @default.
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