COMMD proteins, a novel family of structural and functional homologs of MURR1.

MURR1 is a multifunctional protein that inhibits nuclear factor kappaB (NF-kappaB), a transcription factor with pleiotropic functions affecting innate and adaptive immunity, apoptosis, cell cycle regulation, and oncogenesis. Here we report the discovery of a new family of proteins with homology to MURR1. These proteins form multimeric complexes and were ...
identified in a biochemical screen for MURR1-associated factors. The family is defined by the presence of a conserved and unique motif termed the COMM (copper metabolism gene MURR1) domain, which functions as an interface for protein-protein interactions. Like MURR1, several of these factors also associate with and inhibit NF-kappaB. The proteins designated as COMMD or COMM domain containing 1-10 are extensively conserved in multicellular eukaryotic organisms and define a novel family of structural and functional homologs of MURR1. The prototype of this family, MURR1/COMMD1, suppresses NF-kappaB not by affecting nuclear translocation or binding of NF-kappaB to cognate motifs; rather, it functions in the nucleus by affecting the association of NF-kappaB with chromatin.
Mesh Terms:
Active Transport, Cell Nucleus, Adaptor Proteins, Signal Transducing, Amino Acid Motifs, Amino Acid Sequence, Animals, Apoptosis, Carrier Proteins, Cell Cycle, Cell Line, Cell Nucleus, Chromatin, Chromatin Immunoprecipitation, Glutathione Transferase, Humans, Immunoblotting, Immunoprecipitation, Luciferases, Microscopy, Confocal, Microscopy, Fluorescence, Molecular Sequence Data, NF-kappa B, Plasmids, Protein Binding, Protein Structure, Tertiary, Proteins, Reverse Transcriptase Polymerase Chain Reaction, Sequence Homology, Amino Acid, Subcellular Fractions, Transfection
J. Biol. Chem.
Date: Jun. 10, 2005
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