Q60680 (IKKA_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 134.
History...
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Inhibitor of nuclear factor kappa-B kinase subunit alpha Short name=I-kappa-B kinase alpha Short name=IKK-A Short name=IKK-alpha Short name=IkBKA Short name=IkappaB kinase EC=2.7.11.10 Alternative name(s): Conserved helix-loop-helix ubiquitous kinase I-kappa-B kinase 1 Short name=IKK1 Nuclear factor NF-kappa-B inhibitor kinase alpha Short name=NFKBIKA | ||||
| Gene names |
| ||||
| Organism | Mus musculus (Mouse) [Reference proteome] | ||||
| Taxonomic identifier | 10090 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 745 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Serine kinase that plays an essential role in the NF-kappa-B signaling pathway which is activated by multiple stimuli such as inflammatory cytokines, bacterial or viral products, DNA damages or other cellular stresses. Acts as part of the canonical IKK complex in the conventional pathway of NF-kappa-B activation and phosphorylates inhibitors of NF-kappa-B on serine residues. These modifications allow polyubiquitination of the inhibitors and subsequent degradation by the proteasome. In turn, free NF-kappa-B is translocated into the nucleus and activates the transcription of hundreds of genes involved in immune response, growth control, or protection against apoptosis. Negatively regulates the pathway by phosphorylating the scaffold protein TAXBP1 and thus promoting the assembly of the A20/TNFAIP3 ubiquitin-editing complex (composed of A20/TNFAIP3, TAX1BP1, and the E3 ligases ITCH and RNF11). Therefore, CHUK plays a key role in the negative feedback of NF-kappa-B canonical signaling to limit inflammatory gene activation. As part of the non-canonical pathway of NF-kappa-B activation, the MAP3K14-activated CHUK/IKKA homodimer phosphorylates NFKB2/p100 associated with RelB, inducing its proteolytic processing to NFKB2/p52 and the formation of NF-kappa-B RelB-p52 complexes. In turn, these complexes regulate genes encoding molecules involved in B-cell survival and lymphoid organogenesis. Participates also in the negative feedback of the non-canonical NF-kappa-B signaling pathway by phosphorylating and destabilizing MAP3K14/NIK. Within the nucleus, phosphorylates CREBBP and consequently increases both its transcriptional and histone acetyltransferase activities. Modulates chromatin accessibility at NF-kappa-B-responsive promoters by phosphorylating histones H3 at 'Ser-10' that are subsequently acetylated at 'Lys-14' by CREBBP. Additionally, phosphorylates the CREBBP-interacting protein NCOA3. Ref.11 |
| Catalytic activity | ATP + [I-kappa-B protein] = ADP + [I-kappa-B phosphoprotein]. |
| Enzyme regulation | Activated when phosphorylated and inactivated when dephosphorylated. |
| Subunit structure | Component of the I-kappa-B-kinase (IKK) core complex consisting of CHUK, IKBKB and IKBKG; probably four alpha/CHUK-beta/IKBKB dimers are associated with four gamma/IKBKG subunits. The IKK core complex seems to associate with regulatory or adapter proteins to form a IKK-signalosome holo-complex. The IKK complex associates with TERF2IP/RAP1, leading to promote IKK-mediated phosphorylation of RELA/p65. Part of a complex composed of NCOA2, NCOA3, CHUK/IKKA, IKBKB, IKBKG and CREBBP. Part of a 70-90 kDa complex at least consisting of CHUK/IKKA, IKBKB, NFKBIA, RELA, IKBKAP and MAP3K14. Directly interacts with IKK-gamma/NEMO and TRPC4AP. May interact with TRAF2. Interacts with NALP2. May interact with MAVS/IPS1. Interacts with ARRB1 By similarity. Interacts with NLRC5; prevents CHUK phosphorylation and kinase activity By similarity. Interacts with PIAS1; this interaction induces PIAS1 phosphorylation By similarity. Interacts with ARRB2. Ref.12 Ref.13 |
| Subcellular location | Cytoplasm. Nucleus. Note: Shuttles between the cytoplasm and the nucleus. Ref.11 |
| Tissue specificity | Ubiquitous only for isoform 1, isoforms 2 and 3 are expressed predominantly in brain and T-lymphocytes. |
| Developmental stage | Maximally expressed at E7 day followed by E11, E15 and E17 days. In the limb development, its expression predominates in the limb buds at E12.5 day. |
| Domain | The kinase domain is located in the N-terminal region. The leucine zipper is important to allow homo- and hetero-dimerization. At the C-terminal region is located the region responsible for the interaction with NEMO/IKBKG. |
| Post-translational modification | Phosphorylated by MAP3K14/NIK, AKT and to a lesser extent by MEKK1, and dephosphorylated by PP2A. Autophosphorylated. Ref.7 Ref.9 |
| Disruption phenotype | Mice show abnormal appearance and die within 4 hours after birth. The epidermal cells are highly proliferative with dysregulated epidermal differentiation. Ref.5 |
| Sequence similarities | Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. I-kappa-B kinase subfamily. Contains 1 protein kinase domain. |
Ontologies
Binary interactions
With | Entry | #Exp. | IntAct | Notes |
|---|---|---|---|---|
| Fam92a1 | Q8BP22 | 4 | EBI-646260,EBI-646638 | |
| Ikbkg | O88522 | 4 | EBI-646245,EBI-998011 | |
| Irf7 | P70434 | 3 | EBI-646245,EBI-997907 | |
| Krt10 | P02535 | 6 | EBI-646260,EBI-646288 | |
| MAP3K14 | Q99558 | 3 | EBI-646264,EBI-358011 | From a different organism. |
| NFKBIA | P25963 | 2 | EBI-646264,EBI-307386 | From a different organism. |
| Pde4dip | B7ZNY0 | 4 | EBI-646260,EBI-659248 |
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q60680-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: Q60680-2) Also known as: Delta LH; The sequence of this isoform differs from the canonical sequence as follows: 452-471: MLSLLRYNANLTKMKNTLIS → IFRKNVKSMERNGRKGHSLF 472-745: Missing. | ||||||
| Isoform 3 (identifier: Q60680-3) Also known as: Delta H; The sequence of this isoform differs from the canonical sequence as follows: 577-584: DHLYSDST → GKTLQSQY 585-745: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 745 | 745 | Inhibitor of nuclear factor kappa-B kinase subunit alpha | PRO_0000086012 | |||||
Regions | |||||||||
| Domain | 15 – 300 | 286 | Protein kinase | ||||||
| Nucleotide binding | 21 – 29 | 9 | ATP By similarity | ||||||
| Region | 455 – 476 | 22 | Leucine-zipper | ||||||
| Region | 738 – 743 | 6 | NEMO-binding | ||||||
Sites | |||||||||
| Active site | 144 | 1 | Proton acceptor By similarity | ||||||
| Binding site | 44 | 1 | ATP By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 23 | 1 | Phosphothreonine; by PKB/AKT1 and SGK1 By similarity | ||||||
| Modified residue | 176 | 1 | Phosphoserine; by MAP3K14 By similarity | ||||||
| Modified residue | 180 | 1 | Phosphoserine; by SGK1 By similarity | ||||||
Natural variations | |||||||||
| Alternative sequence | 452 – 471 | 20 | MLSLL…NTLIS → IFRKNVKSMERNGRKGHSLF in isoform 2. | VSP_004866 | |||||
| Alternative sequence | 472 – 745 | 274 | Missing in isoform 2. | VSP_004867 | |||||
| Alternative sequence | 577 – 584 | 8 | DHLYSDST → GKTLQSQY in isoform 3. | VSP_004868 | |||||
| Alternative sequence | 585 – 745 | 161 | Missing in isoform 3. | VSP_004869 | |||||
Experimental info | |||||||||
| Sequence conflict | 236 | 1 | K → E in BAB31335. Ref.3 | ||||||
| Sequence conflict | 400 | 1 | S → Y in BAB31335. Ref.3 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "CHUK, a conserved helix-loop-helix ubiquitous kinase, maps to human chromosome 10 and mouse chromosome 19." Mock B.A., Connelly M.A., McBride O.W., Kozak C.A., Marcu K.B. Genomics 27:348-351(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Strain: BALB/c. |
| [2] | "CHUK, a new member of the helix-loop-helix and leucine zipper families of interacting proteins, contains a serine-threonine kinase catalytic domain." Connelly M.A., Marcu K.B. Cell. Mol. Biol. Res. 41:537-549(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Strain: BALB/c. |
| [3] | "The transcriptional landscape of the mammalian genome." Carninci P., Kasukawa T., Katayama S., Gough J., Frith M.C., Maeda N., Oyama R., Ravasi T., Lenhard B., Wells C., Kodzius R., Shimokawa K., Bajic V.B., Brenner S.E., Batalov S., Forrest A.R., Zavolan M., Davis M.J. Hayashizaki Y.Science 309:1559-1563(2005) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3). Strain: C57BL/6J. Tissue: Colon. |
| [4] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3). Tissue: Eye. |
| [5] | "Limb and skin abnormalities in mice lacking IKKalpha." Takeda K., Takeuchi O., Tsujimura T., Itami S., Adachi O., Kawai T., Sanjo H., Yoshikawa K., Terada N., Akira S. Science 284:313-316(1999) [PubMed] [Europe PMC] [Abstract] Cited for: DISRUPTION PHENOTYPE. |
| [6] | "Functional isoforms of IkappaB kinase alpha (IKKalpha) lacking leucine zipper and helix-loop-helix domains reveal that IKKalpha and IKKbeta have different activation requirements." McKenzie F.R., Connelly M.A., Balzarano D., Mueller J.R., Geleziunas R., Marcu K.B. Mol. Cell. Biol. 20:2635-2649(2000) [PubMed] [Europe PMC] [Abstract] Cited for: ALTERNATIVE SPLICING. |
| [7] | "Differential regulation of IkappaB kinase alpha and beta by two upstream kinases, NF-kappaB-inducing kinase and mitogen-activated protein kinase/ERK kinase kinase-1." Nakano H., Shindo M., Sakon S., Nishinaka S., Mihara M., Yagita H., Okumura K. Proc. Natl. Acad. Sci. U.S.A. 95:3537-3542(1998) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION BY MAP3K14/NIK. |
| [8] | "Positive and negative regulation of IkappaB kinase activity through IKKbeta subunit phosphorylation." Delhase M., Hayakawa M., Chen Y., Karin M. Science 284:309-313(1999) [PubMed] [Europe PMC] [Abstract] Cited for: IKKA-IKKB BINDING. |
| [9] | "Coordinate regulation of IkappaB kinases by mitogen-activated protein kinase kinase kinase 1 and NF-kappaB-inducing kinase." Nemoto S., DiDonato J.A., Lin A. Mol. Cell. Biol. 18:7336-7343(1998) [PubMed] [Europe PMC] [Abstract] Cited for: IKK PHOSPHORYLATION. |
| [10] | "The I kappa B/NF-kappa B system: a key determinant of mucosal inflammation and protection." Jobin C., Sartor R.B. Am. J. Physiol. 278:C451-C462(2000) [PubMed] [Europe PMC] [Abstract] Cited for: REVIEW. |
| [11] | "Histone H3 phosphorylation by IKK-alpha is critical for cytokine-induced gene expression." Yamamoto Y., Verma U.N., Prajapati S., Kwak Y.T., Gaynor R.B. Nature 423:655-659(2003) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, SUBCELLULAR LOCATION. |
| [12] | "Beta2-adrenergic receptor regulates Toll-like receptor-4-induced nuclear factor-kappaB activation through beta-arrestin 2." Kizaki T., Izawa T., Sakurai T., Haga S., Taniguchi N., Tajiri H., Watanabe K., Day N.K., Toba K., Ohno H. Immunology 124:348-356(2008) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH ARRB2. |
| [13] | "Telomere-independent Rap1 is an IKK adaptor and regulates NF-kappaB-dependent gene expression." Teo H., Ghosh S., Luesch H., Ghosh A., Wong E.T., Malik N., Orth A., de Jesus P., Perry A.S., Oliver J.D., Tran N.L., Speiser L.J., Wong M., Saez E., Schultz P., Chanda S.K., Verma I.M., Tergaonkar V. Nat. Cell Biol. 12:758-767(2010) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH TERF2IP. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | U12473 mRNA. Translation: AAC52589.1. AK018671 mRNA. Translation: BAB31335.1. BC018243 mRNA. Translation: AAH18243.1. |
| IPI | IPI00119213. IPI00230069. IPI00400114. |
| PIR | I49101. |
| UniGene | Mm.3996. |
3D structure databases | |
| ProteinModelPortal | Q60680. |
| SMR | Q60680. Positions 16-660. |
| ModBase | Search... |
Protein-protein interaction databases | |
| DIP | DIP-29719N. |
| IntAct | Q60680. 25 interactions. |
| MINT | MINT-267529. |
PTM databases | |
| PhosphoSite | Q60680. |
Proteomic databases | |
| PaxDb | Q60680. |
| PRIDE | Q60680. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| UCSC | uc008hpi.2. mouse. |
Organism-specific databases | |
| MGI | MGI:99484. Chuk. |
Phylogenomic databases | |
| eggNOG | COG0515. |
| HOGENOM | HOG000038048. |
| HOVERGEN | HBG018241. |
| InParanoid | Q60680. |
| OrthoDB | EOG4SJ5D7. |
Enzyme and pathway databases | |
| BRENDA | 2.7.11.10. 3474. |
Gene expression databases | |
| CleanEx | MM_CHUK. |
| Genevestigator | Q60680. |
| GermOnline | ENSMUSG00000025199. Mus musculus. |
Family and domain databases | |
| InterPro | IPR022007. IKKbetaNEMObind. IPR011009. Kinase-like_dom. IPR000719. Prot_kinase_cat_dom. IPR017441. Protein_kinase_ATP_BS. IPR008271. Ser/Thr_kinase_AS. [Graphical view] |
| Pfam | PF12179. IKKbetaNEMObind. 1 hit. PF00069. Pkinase. 1 hit. [Graphical view] |
| SUPFAM | SSF56112. Kinase_like. 1 hit. |
| PROSITE | PS00107. PROTEIN_KINASE_ATP. 1 hit. PS50011. PROTEIN_KINASE_DOM. 1 hit. PS00108. PROTEIN_KINASE_ST. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| ChEMBL | CHEMBL5380. |
| SOURCE | Search... |
Entry information
| Entry name | IKKA_MOUSE | ||||||||
| Accession | Primary (citable) accession number: Q60680 Secondary accession number(s): Q80VU2, Q9D2X3 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| Human and mouse protein kinases Human and mouse protein kinases: classification and index |
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
