2fmt | pdb_00002fmt

METHIONYL-TRNAFMET FORMYLTRANSFERASE COMPLEXED WITH FORMYL-METHIONYL-TRNAFMET

spinqualitylabelsall models 2fmt, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2fmt is a 4 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FME, MG NonStd Res: 4SU, 5MU, H2U, OMC, PSU Gene: FMT ("Bacillus coli" Migula 1895) Activity: Methionyl-tRNA formyltransferase, with EC number 2.1.2.9 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [FMT_ECOLI] Modifies the free amino group of the aminoacyl moiety of methionyl-tRNA(fMet). The formyl group appears to play a dual role in the initiator identity of N-formylmethionyl-tRNA by: (I) promoting its recognition by IF2 and (II) impairing its binding to EFTu-GTP. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The crystal structure of Escherichia coli methionyl-tRNAfMet transformylase complexed with formyl-methionyl-tRNAfMet was solved at 2.8 A resolution. The formylation reaction catalyzed by this enzyme irreversibly commits methionyl-tRNAfMet to initiation of translation in eubacteria. In the three-dimensional model, the methionyl-tRNAfMet formyltransferase fills in the inside of the L-shaped tRNA molecule on the D-stem side. The anticodon stem and loop are away from the protein. An enzyme loop is wedged in the major groove of the acceptor helix. As a result, the C1-A72 mismatch characteristic of the initiator tRNA is split and the 3' arm bends inside the active centre. This recognition mechanism is markedly distinct from that of elongation factor Tu, which binds the acceptor arm of aminoacylated elongator tRNAs on the T-stem side. Crystal structure of methionyl-tRNAfMet transformylase complexed with the initiator formyl-methionyl-tRNAfMet.,Schmitt E, Panvert M, Blanquet S, Mechulam Y EMBO J. 1998 Dec 1;17(23):6819-26. PMID:9843487 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Transfer RNA (tRNA)

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