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Identification of a novel protein from glial cells based on its ability to interact with NF‐κB subunitsr
Author(s) -
Sweet Thersa,
Khalili Kamel,
Sawaya Bassel E.,
Amini Shohreh
Publication year - 2003
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.10701
Subject(s) - biology , transcription factor , open reading frame , gene , complementary dna , cdna library , nucleolus , transcription (linguistics) , microbiology and biotechnology , dna binding protein , dna , gene expression , cytoplasm , peptide sequence , genetics , philosophy , linguistics
Nuclear factor κB (NF‐κB) represents a family of inducible DNA‐binding transcription factors whose activity is critical for expression of the HIV‐1 genome in a broad range of cells. In addition to its interaction with the κB DNA sequence, the association of NF‐κB subunits with other cellular proteins plays an important role in stimulation of HIV‐1 gene transcription in astrocytic cells. Here, we utilized a yeast two‐hybrid system to screen a cDNA library from a human astrocytic cell line and were able to isolate a partial cDNA belonging to a gene with an open reading frame of 1,871 amino acid residues which binds to both the p50 and p65 subunits of NF‐κB. This gene, named NF‐κB‐binding protein ( NFBP ) is located on chromosome 10q24.2‐25.1 and hybridized to a single transcript of nearly 6 kb in size. It is localized to the nucleus, specifically the nucleolus of cells. Extensive computer analysis was performed with the sequence of the full length NFBP and significant homology was found between NFBP, and yeast and mouse proteins. A discussion of the potential roles of NFBP in normal and viral infected cells is included. © 2003 Wiley‐Liss, Inc.