Function
P62 appears to interact with mRNA during transport out of the nucleus. P62 also interacts with a nuclear transport factor (NTF2) protein that is involved in trafficking proteins between cytoplasm and nucleus. Another protein, importin (beta) binds to the helical rod section of p62, which also binds NTF2 suggesting the formation of a higher order gating complex. Karyopherin beta2 (transportin), a riboprotein transporter also interacts with p62. P62 also interacts with nucleoporin-93kDa, and when Nup98 is depleted p62 fails to assemble with nuclear pore complexes. Mutant pores could not dock/transport proteins with nuclear localization signals or M9 import signals.
Read more about this topic: Nucleoporin 62
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