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UniProtKB/Swiss-Prot P24394: Variant p.Glu400Ala

Interleukin-4 receptor subunit alpha
Gene: IL4R
Variant information

Variant position:  400
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Glutamate (E) to Alanine (A) at position 400 (E400A, p.Glu400Ala).
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:  Change from medium size and acidic (E) to small size and hydrophobic (A)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -1
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

Polymorphism:  Allelic variants in IL4RA are associated with a susceptibility to atopy, an immunological condition that can lead to clinical symptoms such as allergic rhinitis, sinusitis, asthma and eczema.Allelic variants in IL4RA are associated with cedar pollen sensitization. Individuals develop Japanese cedar pollinosis with increased exposure to cedar pollen. Japanese cedar pollinosis is a type I allergic disease with ocular and nasal symptoms that develop paroxysmally on contact with Japanese cedar pollen. These symptoms, which occur seasonally each year, are typical features of allergic rhinitis, such as sneezing, excessive nasal secretion, nasal congestion, and conjunctival itching. -
Additional information on the polymorphism described.

Variant description:  Associated with cedar pollen sensitization.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.

Sequence information

Variant position:  400
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  825
The length of the canonical sequence.

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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.






Sequence annotation in neighborhood:  
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.

Chain 26 – 825 Interleukin-4 receptor subunit alpha
Topological domain 257 – 825 Cytoplasmic
Alternative sequence 228 – 825 Missing. In isoform 2.

Literature citations

SeattleSNPs variation discovery resource;
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS VAL-75; ALA-400; ARG-431; LEU-436; PRO-503; ARG-576; ILE-579; SER-675 AND ALA-752;

Identification of a novel single-nucleotide polymorphism (Val554Ile) and definition of eight common alleles for human IL4RA exon 11.
Lozano F.; Places L.; Vila J.-M.; Padilla O.; Arman M.; Gimferrer I.; Suarez B.; Lopez de la Iglesia A.; Miserachs N.; Vives J.;
Tissue Antigens 57:216-220(2001)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 301-825 (ISOFORM 1); VARIANTS ALA-400; ARG-431; LEU-436; PRO-503; ARG-576 AND ILE-579;

Common polymorphisms in the coding part of the IL4-receptor gene.
Deichmann K.; Bardutzky J.; Forster J.; Heinzmann A.; Kuehr J.;
Biochem. Biophys. Res. Commun. 231:696-697(1997)
Cited for: VARIANTS VAL-75; ALA-400; ARG-431; LEU-436 AND PRO-786;

High contribution contrast between the genes of eosinophil peroxidase and IL-4 receptor alpha-chain in Japanese cedar pollinosis.
Nakamura H.; Miyagawa K.; Ogino K.; Endo T.; Imai T.; Ozasa K.; Motohashi Y.; Matsuzaki I.; Sasahara S.; Hatta K.; Eboshida A.;
J. Allergy Clin. Immunol. 112:1127-1131(2003)

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.