Javascript is not enabled on this browser. This site will not work properly without Javascript.
PhosphoSitePlus Homepage Cell Signaling Technology
HomeAbout PhosphoSiteUsing PhosphoSiteprivacy & cookiesCuration ProcessContact
logos LINCs Logo Mt Sinai Logo NIH Logo NCI Logo
Protein Page:
IkB-beta (rat)

IkB-beta a protein of the NF-kappa-B inhibitor family. 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 IKBA- dependent inactivation. Association with inhibitor kappa B- interacting Ras-like proteins 1 and 2 may also explain the slower degradation. Interacts with ligand-binding domain of thyroid hormone receptor-beta, inhibitor kappa B-interacting Ras-like protein 1, inhibitor kappa B-interacting protein Ras2, p65 (RELA) and c-Rel. Expressed in all tissues examined. Note: This description may include information from UniProtKB.
Protein type: Inhibitor
Cellular Component: cytoplasm; cytosol
Molecular Function: NF-kappaB binding
Biological Process: cytoplasmic sequestering of NF-kappaB; signal transduction
Reference #:  Q9JIA3 (UniProtKB)
Alt. Names/Synonyms: I-kappa-B-beta; IkappaBbeta; IkB-B; IkB-beta; Ikbb; MGC93398; NF-kappa-B inhibitor beta; NF-kappa-BIB; Nfkbib; nuclear factor of kappa light chain gene enhancer in B-cells inhibitor, beta; nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, beta
Gene Symbols: Nfkbib
Molecular weight: 38,081 Da
Basal Isoelectric point: 4.67  Predict pI for various phosphorylation states
CST Pathways:  B Cell Receptor Signaling  |  Death Receptor Signaling  |  Inhibition of Apoptosis  |  NF-kB Signaling  |  T Cell Receptor Signaling
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
Select Structure to View Below


Protein Structure Not Found.
Download PyMol Script
Download ChimeraX Script

STRING  |  Reactome  |  BioGPS  |  Scansite  |  Pfam  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  Ensembl Gene