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Fig. 4. The three-dimensional structure of trans- and cis-acting tRNA-binding domains present in ARSs and ARS-associated factors. (A) The peptides A147 to E314 of p43 (Kim, Y. et al., 2000; Renault et al., 2001) and M1 to A111 of Trbp111 (Morales et al., 1999). Two domains contain the typical oligonucleotide-binding (OB) fold, consisting of a five-stranded ß-barrel that is known to have RNA-binding capability. (B) The 57 aa peptide region from D677 to P733 of human EPRS (Cahuzac et al., 2000; Jeong et al., 2000). Notice that the basic residues are exposed from the two helices arranged in anti-parallel mode.





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