How proteins enter the nucleus - PubMed

Review

How proteins enter the nucleus

P A Silver. Cell. 1991.

Abstract

Nuclear protein import is a selective process. Proteins destined for the nucleus contain NLSs. These short stretches of amino acids interact with proteins located in the cytoplasm, on the nuclear envelope, and/or at the nuclear pore complex. Following binding at the pore complex, proteins are translocated through the pore into the nucleus in a manner requiring ATP. The biochemical dissection of the nuclear pore complex has begun. Alteration of protein import into the nucleus is emerging as a new and complex form of regulation. However, we are left with the following problems: How do proteins move through the cytoplasm to reach the nuclear pore? How does the nuclear pore complex open and close in a selective manner? How is ATP utilized during import? And finally, how is bi-directional traffic of both proteins and RNA through the pore regulated?

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