3TL4: Crystal structure of the tRNA binding domain of glutaminyl-tRNA synthetase from saccharomyces cerevisiae (an appended domain in eukaryotes). Details are available in “Structural conservation of an ancient tRNA sensor in eukaryotic glutaminyl-tRNA synthetase“. This structure is linked to 4H3S described in the paper entitled “The structure of yeast glutaminyl-tRNA synthetase and modeling of its interaction with tRNA“.