這個基因編碼翻譯抑制蛋白家族的一個成員。該蛋白直接與真核細胞翻譯起始因子4e（eif4e）相互作用，該因子是多亞單位復合物的一個限制性成分，在mRNAs的5'端招募40s核糖體亞單位。這種蛋白與eif4e的相互作用抑制復雜的裝配和翻譯。這種蛋白被磷酸化，以響應各種信號，包括紫外線輻射和胰島素信號，導致其與eif4e的分離和激活的mRNA翻譯。
This gene encodes one member of a family of translation repressor proteins. The protein directly interacts with eukaryotic translation initiation factor 4E (eIF4E), which is a limiting component of the multisubunit complex that recruits 40S ribosomal subunits to the 5' end of mRNAs. Interaction of this protein with eIF4E inhibits complex assembly and represses translation. This protein is phosphorylated in response to various signals including UV irradiation and insulin signaling, resulting in its dissociation from eIF4E and activation of mRNA translation.