Tetraproline is a fragment sequence in tristetraprolin (TTP). Recruitment of the 4EHP-GYF2 cap-binding complex to tetraproline motifs of tristetraprolin promotes repression and degradation of mRNAs with AU-rich elements[1].
References
[1] Fu R, et, al. Recruitment of the 4EHP-GYF2 cap-binding complex to tetraproline motifs of tristetraprolin promotes repression and degradation of mRNAs with AU-rich elements. RNA. 2016 Mar;22(3):373-82. DOI:10.1016/j.chroma.2012.09.075