NameNuclear factor NF-kappa-B p105 subunit
Synonyms
  • DNA-binding factor KBF1
  • EBP-1
  • Nuclear factor of kappa light polypeptide gene enhancer in B-cells 1
Gene NameNFKB1
OrganismHuman
Amino acid sequence
>lcl|BSEQ0002161|Nuclear factor NF-kappa-B p105 subunit
MAEDDPYLGRPEQMFHLDPSLTHTIFNPEVFQPQMALPTDGPYLQILEQPKQRGFRFRYV
CEGPSHGGLPGASSEKNKKSYPQVKICNYVGPAKVIVQLVTNGKNIHLHAHSLVGKHCED
GICTVTAGPKDMVVGFANLGILHVTKKKVFETLEARMTEACIRGYNPGLLVHPDLAYLQA
EGGGDRQLGDREKELIRQAALQQTKEMDLSVVRLMFTAFLPDSTGSFTRRLEPVVSDAIY
DSKAPNASNLKIVRMDRTAGCVTGGEEIYLLCDKVQKDDIQIRFYEEEENGGVWEGFGDF
SPTDVHRQFAIVFKTPKYKDINITKPASVFVQLRRKSDLETSEPKPFLYYPEIKDKEEVQ
RKRQKLMPNFSDSFGGGSGAGAGGGGMFGSGGGGGGTGSTGPGYSFPHYGFPTYGGITFH
PGTTKSNAGMKHGTMDTESKKDPEGCDKSDDKNTVNLFGKVIETTEQDQEPSEATVGNGE
VTLTYATGTKEESAGVQDNLFLEKAMQLAKRHANALFDYAVTGDVKMLLAVQRHLTAVQD
ENGDSVLHLAIIHLHSQLVRDLLEVTSGLISDDIINMRNDLYQTPLHLAVITKQEDVVED
LLRAGADLSLLDRLGNSVLHLAAKEGHDKVLSILLKHKKAALLLDHPNGDGLNAIHLAMM
SNSLPCLLLLVAAGADVNAQEQKSGRTALHLAVEHDNISLAGCLLLEGDAHVDSTTYDGT
TPLHIAAGRGSTRLAALLKAAGADPLVENFEPLYDLDDSWENAGEDEGVVPGTTPLDMAT
SWQVFDILNGKPYEPEFTSDDLLAQGDMKQLAEDVKLQLYKLLEIPDPDKNWATLAQKLG
LGILNNAFRLSPAPSKTLMDNYEVSGGTVRELVEALRQMGYTEAIEVIQAASSPVKTTSQ
AHSLPLSPASTRQQIDELRDSDSVCDSGVETSFRKLSFTESLTSGASLLTLNKMPHDYGQ
EGPLEGKI
Number of residues968
Molecular Weight105355.175
Theoretical pI5.05
GO Classification
Functions
  • transcription regulatory region DNA binding
  • chromatin binding
  • regulatory region DNA binding
  • protein heterodimerization activity
  • transcription factor binding
  • RNA polymerase II distal enhancer sequence-specific DNA binding
  • transcription regulatory region sequence-specific DNA binding
  • transcriptional activator activity, RNA polymerase II distal enhancer sequence-specific binding
  • identical protein binding
  • transcriptional repressor activity, RNA polymerase II transcription regulatory region sequence-specific binding
  • transcription factor activity, sequence-specific DNA binding
  • actinin binding
  • RNA polymerase II regulatory region sequence-specific DNA binding
Processes
  • neurotrophin TRK receptor signaling pathway
  • TRIF-dependent toll-like receptor signaling pathway
  • NIK/NF-kappaB signaling
  • negative regulation of cellular protein metabolic process
  • positive regulation of transcription from RNA polymerase II promoter
  • cellular response to interleukin-1
  • response to oxidative stress
  • cellular response to nicotine
  • cellular response to dsRNA
  • response to muscle stretch
  • positive regulation of NF-kappaB transcription factor activity
  • stimulatory C-type lectin receptor signaling pathway
  • positive regulation of type I interferon production
  • inflammatory response
  • cellular response to peptide hormone stimulus
  • negative regulation of interleukin-12 biosynthetic process
  • cellular response to interleukin-6
  • MyD88-dependent toll-like receptor signaling pathway
  • negative regulation of vitamin D biosynthetic process
  • positive regulation of macrophage derived foam cell differentiation
  • transcription from RNA polymerase II promoter
  • MyD88-independent toll-like receptor signaling pathway
  • negative regulation of inflammatory response
  • stress-activated MAPK cascade
  • negative regulation of transcription from RNA polymerase II promoter
  • toll-like receptor 10 signaling pathway
  • cellular response to lipopolysaccharide
  • membrane protein intracellular domain proteolysis
  • innate immune response
  • toll-like receptor 2 signaling pathway
  • T cell receptor signaling pathway
  • Fc-epsilon receptor signaling pathway
  • toll-like receptor 3 signaling pathway
  • I-kappaB kinase/NF-kappaB signaling
  • positive regulation of hyaluronan biosynthetic process
  • toll-like receptor 4 signaling pathway
  • response to copper ion
  • cellular response to mechanical stimulus
  • toll-like receptor 5 signaling pathway
  • toll-like receptor 9 signaling pathway
  • positive regulation of canonical Wnt signaling pathway
  • toll-like receptor signaling pathway
  • positive regulation of lipid storage
  • positive regulation of transcription, DNA-templated
  • toll-like receptor TLR1
  • positive regulation of miRNA metabolic process
  • apoptotic process
  • negative regulation of apoptotic process
  • toll-like receptor TLR6
  • negative regulation of calcidiol 1-monooxygenase activity
  • negative regulation of cholesterol transport
Components
  • nucleus
  • cytosol
  • nucleoplasm
  • I-kappaB/NF-kappaB complex
  • cytoplasm
  • mitochondrion
General FunctionTranscriptional repressor activity, rna polymerase ii transcription regulatory region sequence-specific binding
Specific FunctionNF-kappa-B is a pleiotropic transcription factor present in almost all cell types and is the endpoint of a series of signal transduction events that are initiated by a vast array of stimuli related to many biological processes such as inflammation, immunity, differentiation, cell growth, tumorigenesis and apoptosis. NF-kappa-B is a homo- or heterodimeric complex formed by the Rel-like domain-containing proteins RELA/p65, RELB, NFKB1/p105, NFKB1/p50, REL and NFKB2/p52 and the heterodimeric p65-p50 complex appears to be most abundant one. The dimers bind at kappa-B sites in the DNA of their target genes and the individual dimers have distinct preferences for different kappa-B sites that they can bind with distinguishable affinity and specificity. Different dimer combinations act as transcriptional activators or repressors, respectively. NF-kappa-B is controlled by various mechanisms of post-translational modification and subcellular compartmentalization as well as by interactions with other cofactors or corepressors. NF-kappa-B complexes are held in the cytoplasm in an inactive state complexed with members of the NF-kappa-B inhibitor (I-kappa-B) family. In a conventional activation pathway, I-kappa-B is phosphorylated by I-kappa-B kinases (IKKs) in response to different activators, subsequently degraded thus liberating the active NF-kappa-B complex which translocates to the nucleus. NF-kappa-B heterodimeric p65-p50 and RelB-p50 complexes are transcriptional activators. The NF-kappa-B p50-p50 homodimer is a transcriptional repressor, but can act as a transcriptional activator when associated with BCL3. NFKB1 appears to have dual functions such as cytoplasmic retention of attached NF-kappa-B proteins by p105 and generation of p50 by a cotranslational processing. The proteasome-mediated process ensures the production of both p50 and p105 and preserves their independent function, although processing of NFKB1/p105 also appears to occur post-translationally. p50 binds to the kappa-B consensus sequence 5'-GGRNNYYCC-3', located in the enhancer region of genes involved in immune response and acute phase reactions. In a complex with MAP3K8, NFKB1/p105 represses MAP3K8-induced MAPK signaling; active MAP3K8 is released by proteasome-dependent degradation of NFKB1/p105.
Pfam Domain Function
Transmembrane RegionsNot Available
GenBank Protein ID189180
UniProtKB IDP19838
UniProtKB Entry NameNFKB1_HUMAN
Cellular LocationNucleus
Gene sequence
>lcl|BSEQ0019061|Nuclear factor NF-kappa-B p105 subunit (NFKB1)
ATGGCAGAAGATGATCCATATTTGGGAAGGCCTGAACAAATGTTTCATTTGGATCCTTCT
TTGACTCATACAATATTTAATCCAGAAGTATTTCAACCACAGATGGCACTGCCAACAGAT
GGCCCATACCTTCAAATATTAGAGCAACCTAAACAGAGAGGATTTCGTTTCCGTTATGTA
TGTGAAGGCCCATCCCATGGTGGACTACCTGGTGCCTCTAGTGAAAAGAACAAGAAGTCT
TACCCTCAGGTCAAAATCTGCAACTATGTGGGACCAGCAAAGGTTATTGTTCAGTTGGTC
ACAAATGGAAAAAATATCCACCTGCATGCCCACAGCCTGGTGGGAAAACACTGTGAGGAT
GGGATCTGCACTGTAACTGCTGGACCCAAGGACATGGTGGTCGGCTTCGCAAACCTGGGT
ATACTTCATGTGACAAAGAAAAAAGTATTTGAAACACTGGAAGCACGAATGACAGAGGCG
TGTATAAGGGGCTATAATCCTGGACTCTTGGTGCACCCTGACCTTGCCTATTTGCAAGCA
GAAGGTGGAGGGGACCGGCAGCTGGGAGATCGGGAAAAAGAGCTAATCCGCCAAGCAGCT
CTGCAGCAGACCAAGGAGATGGACCTCAGCGTGGTGCGGCTCATGTTTACAGCTTTTCTT
CCGGATAGCACTGGCAGCTTCACAAGGCGCCTGGAACCCGTGGTATCAGACGCCATCTAT
GACAGTAAAGCCCCCAATGCATCCAACTTGAAAATTGTAAGAATGGACAGGACAGCTGGA
TGTGTGACTGGAGGGGAGGAAATTTATCTTCTTTGTGACAAAGTTCAGAAAGATGACATC
CAGATTCGATTTTATGAAGAGGAAGAAAATGGTGGAGTCTGGGAAGGATTTGGAGATTTT
TCCCCCACAGATGTTCATAGACAATTTGCCATTGTCTTCAAAACTCCAAAGTATAAAGAT
ATTAATATTACAAAACCAGCCTCTGTGTTTGTCCAGCTTCGGAGGAAATCTGACTTGGAA
ACTAGTGAACCAAAACCTTTCCTCTACTATCCTGAAATCAAAGATAAAGAAGAAGTGCAG
AGGAAACGTCAGAAGCTCATGCCCAATTTTTCGGATAGTTTCGGCGGTGGTAGTGGTGCT
GGAGCTGGAGGCGGAGGCATGTTTGGTAGTGGCGGTGGAGGAGGGGGCACTGGAAGTACA
GGTCCAGGGTATAGCTTCCCACACTATGGATTTCCTACTTATGGTGGGATTACTTTCCAT
CCTGGAACTACTAAATCTAATGCTGGGATGAAGCATGGAACCATGGACACTGAATCTAAA
AAGGACCCTGAAGGTTGTGACAAAAGTGATGACAAAAACACTGTAAACCTCTTTGGGAAA
GTTATTGAAACCACAGAGCAAGATCAGGAGCCCAGCGAGGCCACCGTTGGGAATGGTGAG
GTCACTCTAACGTATGCAACAGGAACAAAAGAAGAGAGTGCTGGAGTTCAGGATAACCTC
TTTCTAGAGAAGGCTATGCAGCTTGCAAAGAGGCATGCCAATGCCCTTTTCGACTACGCG
GTGACAGGAGACGTGAAGATGCTGCTGGCCGTCCAGCGCCATCTCACTGCTGTGCAGGAT
GAGAATGGGGACAGTGTCTTACACTTAGCAATCATCCACCTTCATTCTCAACTTGTGAGG
GATCTACTAGAAGTCACATCTGGTTTGATTTCTGATGACATTATCAACATGAGAAATGAT
CTGTACCAGACGCCCTTGCACTTGGCAGTGATCACTAAGCAGGAAGATGTGGTGGAGGAT
TTGCTGAGGGCTGGGGCCGACCTGAGCCTTCTGGACCGCTTGGGTAACTCTGTTTTGCAC
CTAGCTGCCAAAGAAGGACATGATAAAGTTCTCAGTATCTTACTCAAGCACAAAAAGGCA
GCACTACTTCTTGACCACCCCAACGGGGACGGTCTGAATGCCATTCATCTAGCCATGATG
AGCAATAGCCTGCCATGTTTGCTGCTGCTGGTGGCCGCTGGGGCTGACGTCAATGCTCAG
GAGCAGAAGTCCGGGCGCACAGCACTGCACCTGGCTGTGGAGCACGACAACATCTCATTG
GCAGGCTGCCTGCTCCTGGAGGGTGATGCCCATGTGGACAGTACTACCTACGATGGAACC
ACACCCCTGCATATAGCAGCTGGGAGAGGGTCCACCAGGCTGGCAGCTCTTCTCAAAGCA
GCAGGAGCAGATCCCCTGGTGGAGAACTTTGAGCCTCTCTATGACCTGGATGACTCTTGG
GAAAATGCAGGAGAGGATGAAGGAGTTGTGCCTGGAACCACGCCTCTAGATATGGCCACC
AGCTGGCAGGTATTTGACATATTAAATGGGAAACCATATGAGCCAGAGTTTACATCTGAT
GATTTACTAGCACAAGGAGACATGAAACAGCTGGCTGAAGATGTGAAGCTGCAGCTGTAT
AAGTTACTAGAAATTCCTGATCCAGACAAAAACTGGGCTACTCTGGCGCAGAAATTAGGT
CTGGGGATACTTAATAATGCCTTCCGGCTGAGTCCTGCTCCTTCCAAAACACTTATGGAC
AACTATGAGGTCTCTGGGGGTACAGTCAGAGAGCTGGTGGAGGCCCTGAGACAAATGGGC
TACACCGAAGCAATTGAAGTGATCCAGGCAGCCTCCAGCCCAGTGAAGACCACCTCTCAG
GCCCACTCGCTGCCTCTCTCGCCTGCCTCCACAAGGCAGCAAATAGACGAGCTCCGAGAC
AGTGACAGTGTCTGCGACAGCGGCGTGGAGACATCCTTCCGCAAACTCAGCTTTACCGAG
TCTCTGACCAGTGGTGCCTCACTGCTAACTCTCAACAAAATGCCCCATGATTATGGGCAG
GAAGGACCTCTAGAAGGCAAAATTTAG
GenBank Gene IDM55643
GeneCard IDNot Available
GenAtlas IDNFKB1
HGNC IDHGNC:7794
Chromosome Location4
Locus4q24
References
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