Chemical trapping and crystal structure of a catalytic tRNA guanine transglycosylase covalent intermediate
Xie, W., Liu, X., Huang, R.H.(2003) Nat Struct Biol 10: 781-788
- PubMed: 12949492 
- DOI: 10.1038/nsb976
- Primary Citation of Related Structures:  
1Q2R, 1Q2S - PubMed Abstract: 
Prokaryotic tRNA guanine transglycosylase (TGT) catalyzes replacement of guanine (G) by 7-aminomethyl-7-deazaguanine (PreQ1) at the wobble position of four specific tRNAs. Addition of 9-deazaguanine (9dzG) to a reaction mixture of Zymomonas mobilis TGT and an RNA substrate allowed us to trap, purify and crystallize a chemically competent covalent intermediate of the TGT-catalyzed reaction ...