Background: GST domains have been found in diverse proteins involved in translational systems. Results: Four GST domains from human methionyl-tRNA synthetase, glutaminyl-prolyl-tRNA synthetase, ARS-interacting multifunctional protein (AIMP) 2, and AIMP3 are complexed in an ordered fashion. Conclusion: Four components in the human multisynthetase complex are assembled through a GST domain tetrameric complex. Significance: GST domain assemblies act as scaffolds for the formation of multicomponent protein complexes.
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