The GidA associated domain is a domain that has been identified at the C-terminus of protein GidA. It consists of several helices, last three being rather short and forming small bundle and are represented in this entry. GidA is a tRNA modification enzyme found in bacteria and mitochondrial. Based on mutational analysis the C-terminal helices have been suggested to be implicated in binding of the D-stem of tRNA [2] and, specifically this domain, to be responsible for the interaction with protein MnmE [1]. Structures of GidA in complex with either tRNA or MnmE are missing. Reported to bind to Pfam family MnmE, Pfam:PF12631.

1: Crystal structures of the conserved tRNA-modifying enzyme GidA: implications for its interaction with MnmE and substrate. Meyer S, Scrima A, Versees W, Wittinghofer A; J Mol Biol. 2008;380:532-547. PMID:18565343

2: Conserved cysteine residues of GidA are essential for biogenesis of 5-carboxymethylaminomethyluridine at tRNA anticodon. Osawa T, Ito K, Inanaga H, Nureki O, Tomita K, Numata T; Structure. 2009;17:713-724. PMID:19446527

3: Structure-function analysis of Escherichia coli MnmG (GidA), a highly conserved tRNA-modifying enzyme. Shi R, Villarroya M, Ruiz-Partida R, Li Y, Proteau A, Prado S, Moukadiri I, Benitez-Paez A, Lomas R, Wagner J, Matte A, Velazquez-Campoy A, Armengod ME, Cygler M; J Bacteriol. 2009;191:7614-7619. PMID:19801413