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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9Y6K9: Variant p.Arg123Trp

NF-kappa-B essential modulator
Gene: IKBKG
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Variant information Variant position: help 123 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance
Residue change: help From Arginine (R) to Tryptophan (W) at position 123 (R123W, p.Arg123Trp). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Change from large size and basic (R) to large size and aromatic (W) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page
Variant description: help In IP; shows the same luciferase activity as the control. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 123 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 419 The length of the canonical sequence.
Location on the sequence: help LVERLGLEKLDLKRQKEQAL R EVEHLKRCQQQMAEDKASVK The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         LVERLGLEKLDLKRQKEQALREVEHLKRCQQQMAEDKASVK

Mouse                         LVERLSLEKLDLRSQREQALKELEQLKKCQQQMAEDKASVK

Rat                           LVERLSLEKLDLRRQREQALEDLEHLKKCQQQMAEDKASVK

Pig                           LVERLSLEKLELRRQREQALQEVELLKTCQQQMAEDKASVK

Bovine                        LVVRLSLEKRELRQQREQALKEVERLKTCQQQMAEDKASVK

Drosophila                    EVVKL-----------QNMMTEYLALKSTLDKVNQTMLNYH
Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
TypePositionsDescription
Chain 1 – 419 NF-kappa-B essential modulator
Region 1 – 197 Required for interaction with and ubiquitination by MARCHF2
Coiled coil 49 – 356
Cross 111 – 111 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)
Cross 139 – 139 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)
Cross 143 – 143 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)
Mutagenesis 115 – 115 K -> R. No change in the ubiquitination level; when associated with R-399.
Helix 38 – 129



Literature citations
Molecular analysis of the genetic defect in a large cohort of IP patients and identification of novel NEMO mutations interfering with NF-kappaB activation.
Fusco F.; Bardaro T.; Fimiani G.; Mercadante V.; Miano M.G.; Falco G.; Israeel A.; Courtois G.; D'Urso M.; Ursini M.V.;
Hum. Mol. Genet. 13:1763-1773(2004)
Cited for: VARIANTS IP LYS-57; LYS-90 DEL AND TRP-123; VARIANT ASN-113; CHARACTERIZATION OF VARIANTS IP LYS-57; LYS-90 DEL AND TRP-123; CHARACTERIZATION OF VARIANT ASN-113;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.