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IkB alpha/NFKBIA  Protein, Antibody, ELISA Kit, cDNA Clone

Expression host: E. coli  
50 µg 
20 µg 
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IkB alpha/NFKBIA Related Area

IkB alpha/NFKBIA Related Protein, Antibody, cDNA Gene, and ELISA Kits

IkB alpha/NFKBIA Summary & Protein Information

IkB alpha/NFKBIA Background

Gene Summary: This gene encodes a member of the NF-kappa-B inhibitor family, which contain multiple ankrin repeat domains. The encoded NFKBIA protein interacts with REL dimers to inhibit NF-kappa-B/REL complexes which are involved in inflammatory responses. The encoded NFKBIA protein moves between the cytoplasm and the nucleus via a nuclear localization signal and CRM1-mediated nuclear export. Mutations in NFKBIA gene have been found in ectodermal dysplasia anhidrotic with T-cell immunodeficiency autosomal dominant disease. [provided by RefSeq, Aug 2011]
General information above from NCBI
Subunit structure: Interacts with RELA; the interaction requires the nuclear import signal. Interacts with NKIRAS1 and NKIRAS2. Part of a 70-90 kDa complex at least consisting of CHUK, IKBKB, NFKBIA, RELA, IKBKAP and MAP3K14. Interacts with HBV protein X. Interacts with isoform 1 and isoform 2 of RWDD3; the interaction enhances sumoylation. Interacts (when phosphorylated at the 2 serine residues in the destruction motif D-S-G-X(2,3,4)-S) with BTRC. Associates with the SCF(BTRC) complex, composed of SKP1, CUL1 and BTRC; the association is mediated via interaction with BTRC. Part of a SCF(BTRC)-like complex lacking CUL1, which is associated with RELA; RELA interacts directly with NFKBIA. Interacts with PRMT2. Interacts with PRKACA in platelets; this interaction is disrupted by thrombin and collagen. Interacts with HIF1AN. Interacts with MEFV. {ECO:0000269|PubMed:10454581, ECO:0000269|PubMed:10657303, ECO:0000269|PubMed:1493333, ECO:0000269|PubMed:16648481, ECO:0000269|PubMed:17003112, ECO:0000269|PubMed:17956732, ECO:0000269|PubMed:18577712, ECO:0000269|PubMed:20356841, ECO:0000269|PubMed:23469069}.
Subcellular location: Cytoplasm. Nucleus. Note=Shuttles between the nucleus and the cytoplasm by a nuclear localization signal (NLS) and a CRM1-dependent nuclear export. {ECO:0000250}.
Induction: Induced in adherent monocytes.
Post-translational: Phosphorylated; disables inhibition of NF-kappa-B DNA-binding activity. Phosphorylation at positions 32 and 36 is prerequisite to recognition by UBE2D3 leading to polyubiquitination and subsequent degradation. {ECO:0000269|PubMed:10329681, ECO:0000269|PubMed:10882136, ECO:0000269|PubMed:20504922}.; Sumoylated; sumoylation requires the presence of the nuclear import signal. Sumoylation blocks ubiquitination and proteasome-mediated degradation of the protein thereby increasing the protein stability. {ECO:0000269|PubMed:11124955, ECO:0000269|PubMed:17956732, ECO:0000269|PubMed:20504922}.; Monoubiquitinated at Lys-21 and/or Lys-22 by UBE2D3. Ubiquitin chain elongation is then performed by CDC34 in cooperation with the SCF(FBXW11) E3 ligase complex, building ubiquitin chains from the UBE2D3-primed NFKBIA-linked ubiquitin. The resulting polyubiquitination leads to protein degradation. Also ubiquitinated by SCF(BTRC) following stimulus-dependent phosphorylation at Ser-32 and Ser-36. {ECO:0000269|PubMed:10329681, ECO:0000269|PubMed:10882136, ECO:0000269|PubMed:20347421, ECO:0000269|PubMed:20504922, ECO:0000269|PubMed:7479976}.; Deubiquitinated by porcine reproductive and respiratory syndrome virus Nsp2 protein, which thereby interferes with NFKBIA degradation and impairs subsequent NF-kappa-B activation.
Involvement in disease: DISEASE: Ectodermal dysplasia, anhidrotic, with T-cell immunodeficiency autosomal dominant (ADEDAID) [MIM:612132]: A form of ectoderma dysplasia, a heterogeneous group of disorders due to abnormal development of two or more ectodermal structures. This form of ectodermal dysplasia is associated with decreased production of pro-inflammatory cytokines and certain interferons, rendering patients susceptible to infection. {ECO:0000269|PubMed:14523047, ECO:0000269|PubMed:18412279}. Note=The disease is caused by mutations affecting the gene represented in this entry.
Sequence similarity: Belongs to the NF-kappa-B inhibitor family. {ECO:0000305}.; Contains 5 ANK repeats. {ECO:0000255|PROSITE-ProRule:PRU00023}.
General information above from UniProt

Nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IkB alpha, NFKBIA, or IKBA), is a member of the NF-kappa-B inhibitor family that function to inhibit the NF-kB transcription factor. NFKBIA inhibits NF-kB by masking the nuclear localization signals (NLS) of NF-kB proteins and keeping them sequestered in an inactive state in the cytoplasm. In addition, NFKBIA blocks the ability of NF-κB transcription factors to bind to DNA, which is required for NF-kB's proper functioning. Signal-induced degradation of I kappa B alpha exposes the nuclear localization signal of NF-kappa B, thus allowing it to translocate into the nucleus and activate transcription from responsive genes. An autoregulatory loop is established when NF-kappa B induces expression of the I kappa B alpha gene and newly synthesized I kappa B alpha accumulates in the nucleus where it negatively regulates NF-kappa B-dependent transcription. As part of this post-induction repression, the nuclear export signal on I kappa B alpha mediates transport of NF-kappa B-I kappa B alpha complexes from the nucleus to the cytoplasm. Deletion of NFKBIA has an effect that is similar to the effect of EGFR amplification in the pathogenesis of glioblastoma and is associated with comparatively short survival. Polymorphisms in NFKBIA may be important in pre-disposition to and outcome after treatment, of multiple myeloma (MM). The NFKBIA gene product, IkappaBalpha, binds to NF-kappaB preventing its activation and is important in mediating resistance to apoptosis in B-cell lymphoproliferative diseases.

IkB alpha/NFKBIA Alternative Name

MAD-3,IkB alpha,IKBA,NFKBI,NFKBIA, [human]
AI462015,IkB alpha,Nfkbi,Nfkbia, [mouse]
RL/IF-1, [Rat]

IkB alpha/NFKBIA Related Studies

  • Verma IM, et al. (1995) Rel/NF-kappa B/I kappa B family: intimate tales of association and dissociation. Genes Dev. 9 (22): 2723-35.
  • Jacobs MD, et al. (1998) Structure of an IkappaBalpha/NF-kappaB complex. Cell 95 (6): 749-58.
  • Hay RT, et al. (1999) Control of NF-kappa B transcriptional activation by signal induced proteolysis of I kappa B alpha. Philos Trans R Soc Lond B Biol Sci. 354(1389): 1601-9.
  • Spink CF, et al. (2007) Haplotypic structure across the I kappa B alpha gene (NFKBIA) and association with multiple myeloma. Cancer Lett. 246(1-2): 92-9.
  • Bredel M, et al. (2011) NFKBIA deletion in glioblastomas. N Engl J Med. 364(7): 627-37.