This is the TTP binding domain of CCR4-NOT transcription complex subunit 1. It adopts a MIF4G (middle portion of eIF4G) fold [1].

1: Structural basis for the recruitment of the human CCR4-NOT deadenylase complex by tristetraprolin. Fabian MR, Frank F, Rouya C, Siddiqui N, Lai WS, Karetnikov A, Blackshear PJ, Nagar B, Sonenberg N; Nat Struct Mol Biol. 2013;20:735-739. PMID:23644599