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 inner membrane of the nucleus is the membrane which separates the nuclear matrix from the intermembrane space. In mammals, the inner nuclear membrane is associated with heterochromatin and the nuclear lamina.
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.
Nuclear lamina-associated inner nuclear membrane protein that is involved in cell division, nuclear structure organization, maintenance of nuclear envelope integrity and nuclear envelope reformation after mitosis (PubMed:11870211, PubMed:12684533, PubMed:22171324). Involved in chromosome segregation and cell division, probably via its interaction with the nuclear intermediate filament protein lmn-1, the main component of nuclear lamina (PubMed:11870211, PubMed:12684533). Required to organize the distribution of lmn-1, nuclear pore complexes (NPCs) and chromatin in mitotically active cells (PubMed:22171324). Together with lem-2, plays a role in baf-1 enrichment at the nuclear envelope in anaphase (PubMed:12684533). Together with lem-2, involved in muscle cell attachment to hypodermal cells, as well as muscle cell location and sarcomere organization (PubMed:22171324). May play a role in radiation-induced DNA damage repair response (PubMed:22383942). May repress binding of transcription factor pha-4 with target sequences in pharyngeal cells. {Experimental EvidencePubMed:11870211, Experimental EvidencePubMed:12684533, Experimental EvidencePubMed:20714352, Experimental EvidencePubMed:22171324, Experimental EvidencePubMed:22383942}.
National and Kapodistrian University of Athens
Department of Biology
Biophysics & Bioinformatics Laboratory