Cytoplasm {Experimental EvidencePubMed:10733502, Experimental EvidencePubMed:20507984}. Nucleus {Experimental EvidencePubMed:10733502, Experimental EvidencePubMed:20507984}. Nucleus envelope {ECO:0000250|UniProtKB:O60318}. Nucleus, nuclear pore complex {ECO:0000250|UniProtKB:O60318}. Nucleus, nucleoplasm {ECO:0000250|UniProtKB:O60318}. Chromosome {ECO:0000250|UniProtKB:O60318}. Note=In stimulated B-cells, selectively targeted to immunoglobulin gene variable regions (PubMed:20507984). Predominantly located at the nuclear envelope, facing the nucleus interior (By similarity). Localization at the nuclear pore complex requires NUP153, TPR and ALYREF/ALY (By similarity). Also found associated with chromatin (PubMed:23652018). In B-cells, targeted to the immunoglobulin variable region genes (PubMed:20507984, PubMed:23652018). {ECO:0000250|UniProtKB:O60318, Experimental EvidencePubMed:20507984, ECO:0000269|PubMed:23652018}.
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).
As a component of the TREX-2 complex, involved in the export of mRNAs to the cytoplasm through the nuclear pores (By similarity). Through the acetylation of histones, affects the assembly of nucleosomes at immunoglobulin variable region genes and promotes the recruitment and positioning of transcription complex to favor DNA cytosine deaminase AICDA/AID targeting, hence promoting somatic hypermutations (PubMed:23652018). {By
SimilarityUniProtKB:O60318, Experimental EvidencePubMed:23652018}.
National and Kapodistrian University of Athens
Department of Biology
Biophysics & Bioinformatics Laboratory