The nuclear envelope is a membrane system which surrounds the nucleoplasm of eukaryotic cells. It is composed of the nuclear lamina, nuclear pore complexes and two nuclear membranes. The space between the two membranes is called the nuclear intermembrane space.
The membrane surrounding the nucleus. This term is used when it is not known if the protein is found in or associated with the inner or outer nuclear membrane.
Essential for cell growth. Plays a role in assembly of 60S pre-ribosomal particles in the nucleolus. Also required for replication of the M1 double-stranded RNA of the L-A virus. This latter function may reflect an enhanced requirement for free 60S ribosomal particles for the translation of viral mRNAs which lack poly-A tails. {Experimental EvidencePubMed:12808088, Experimental EvidencePubMed:2826479, Experimental EvidencePubMed:7739558}.