Nucleoprotein TPR (TPR)

Functions as a scaffolding component in the atomic stage of the NPC essential for normal nucleocytoplasmic transport of proteins and mRNAs, plays a role in the establishment of nuclear-peripheral chromatin compartmentalization in interphase, and in the mitotic spindle checkpoint signaling during mitosis. Involved in the quality control and retention of unspliced mRNAs in the nucleus; in association with NUP153, regulates the nuclear export of unspliced mRNA species posture constitutive transport element (CTE) in a NXF1- and KHDRBS1-independent manner.

Negatively regulates both the association of CTE-containing mRNA with large polyribosomes and translation initiation. Doesn't play any role in Rev response element (RRE)-mediated export of unspliced mRNAs.