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 nuclear pore complex (NPC) constitutes the exclusive means of nucleocytoplasmic transport. NPCs allow the passive diffusion of ions and small molecules and the active bidirectional transport of macromolecules such as proteins, RNAs etc across the double-membrane nuclear envelope.The NPC is composed of at least 30 distinct subunits known as Nucleoporins (NUPs).
Essential component of the nuclear pore complex (By similarity). The N-terminal is probably involved in nucleocytoplasmic transport (By similarity). The C-terminal is involved in protein- protein interaction probably via coiled-coil formation, promotes its association with centrosomes and may function in anchorage of Nup62 to the pore complex (By similarity). Binds to transcriptionally active genes (PubMed:20144760). Negatively regulates chromatin attachment to the nuclear envelope, probably by preventing chromatin tethering by Nup154 (PubMed:26341556). {By
SimilarityUniProtKB:P37198, Experimental EvidencePubMed:20144760, Experimental EvidencePubMed:26341556}.
National and Kapodistrian University of Athens
Department of Biology
Biophysics & Bioinformatics Laboratory