Recombinant Human NF-kappa-B inhibitor beta (NFKBIB)

Uniprot Id

Q15653

Target Species

Human

Target Name

NFKBIB

Target Full Name

NF-kappa-B inhibitor beta

Target Function

Inhibits NF-kappa-B by complexing with and trapping it in the cytoplasm. However, the unphosphorylated form resynthesized after cell stimulation is able to bind NF-kappa-B allowing its transport to the nucleus and protecting it to further NFKBIA-dependent inactivation. Association with inhibitor kappa B-interacting NKIRAS1 and NKIRAS2 prevent its phosphorylation rendering it more resistant to degradation, explaining its slower degradation.

Target Subcellular Location

Cytoplasm. Nucleus.

Target Protein Families

NF-kappa-B inhibitor family

Target Tissue Specificity

Expressed in all tissues examined.

Target Synonyms

I kappa B beta; I-kappa-B-beta; IkappaBbeta; IKB beta; IkB-B; IkB-beta; IKBB; IKBB_HUMAN; IkBbeta; NF kappa BIB; NF-kappa-B inhibitor beta; NF-kappa-BIB; Nfkbib; Thyroid receptor interacting protein 9; Thyroid receptor-interacting protein 9; TR interacting protein 9; TR-interacting protein 9; TRIP-9; TRIP9

Target Background

The protein encoded by this gene belongs to the NF-kappa-B inhibitor family, which inhibit NF-kappa-B by complexing with, and trapping it in the cytoplasm. Phosphorylation of serine residues on these proteins by kinases marks them for destruction via the ubiquitination pathway, thereby allowing activation of the NF-kappa-B, which translocates to the nucleus to function as a transcription factor. Alternatively spliced transcript variants have been found for this gene.