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Controlling translation during protein synthesis is crucial for cell proliferation and differentiation. Protein translation is orchestrated by an assembly of various protein components at the ribosomal subunits. The eukaryotic translation initiation factor 4G (eIF4G) plays an important role in the formation of the translation initiation complex eIF4F consisting of eIF4G, the ATP dependent RNA helicase eIF4A and the cap binding protein eIF4E. One of the functions of eIF4G is the enhancement of the activity of eIF4A facilitated mainly through binding to the HEAT1 domain of eIF4G. In order to understand the interaction of HEAT1 with eIF4A and other components during translation initiation backbone assignment is essential. Here we report the (1)H, (13)C and (15)N backbone assignment for the HEAT1 domain of human eIF4G isoform I (eIF4GI-HEAT1), the first of three HEAT domains of eIF4G (29 kDa) as a basis for the elucidation of its structure and interactions with its binding partners, necessary for understanding the mechanism of its biological function.

Backbone resonance assignment of the HEAT1-domain of the human eukaryotic translation initiation factor 4GI