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UniProtKB/Swiss-Prot P30532: Variant p.Asp398Asn

Neuronal acetylcholine receptor subunit alpha-5
Gene: CHRNA5
Chromosomal location: 15q24
Variant information

Variant position:  398
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 Aspartate (D) to Asparagine (N) at position 398 (D398N, p.Asp398Asn).
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 (D) to medium size and polar (N)
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:  Genetic variations in CHRNA5 have been associated with susceptibility to smoking-related behavioral traits and lung cancer, contributing to the smoking quantitative trait locus 3 (SQTL3) [MIM:612052].
Additional information on the polymorphism described.

Variant description:  Associated with susceptibility to lung cancer.
Any additional useful information about the variant.

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



Sequence information

Variant position:  398
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  468
The length of the canonical sequence.

Location on the sequence:   EETESGSGPKSSRNTLEAAL  D SIRYITRHIMKENDVREVVE
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.

Human                         EETESGSGPKSSRNTLEAALDSIRYITRHIMKENDVREVVE

Chimpanzee                    EETESGSGPKSSRNTLEAALDSVRCITRHIMKENDVREVVE

Mouse                         EEAEKDGGPKS-RNTLEAALDCIRYITRHVVKENDVREVVE

Rat                           EEAESGAGPKS-RNTLEAALDCIRYITRHVVKENDVREVVE

Bovine                        EEARSSRGPRSSRNALEAALDSVRYITRHVMKETDVREVVE

Chicken                       EEKGNMSGSESSRNTLEAALDSIRYITRHVMKENEVREVVE

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.

TypePositionsDescription
Chain 23 – 468 Neuronal acetylcholine receptor subunit alpha-5
Topological domain 338 – 429 Cytoplasmic


Literature citations

Comparative structure of human neuronal alpha 2-alpha 7 and beta 2-beta 4 nicotinic acetylcholine receptor subunits and functional expression of the alpha 2, alpha 3, alpha 4, alpha 7, beta 2, and beta 4 subunits.
Elliott K.J.; Ellis S.B.; Berckhan K.J.; Urrutia A.; Chavez-Noriega L.E.; Johnson E.C.; Velicelebi G.; Harpold M.M.;
J. Mol. Neurosci. 7:217-228(1996)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; VARIANT ASN-398;

Characterization of the genomic structure of human nicotinic acetylcholine receptor CHRNA5/A3/B4 gene cluster: identification of two novel introns in the 3' untranslated region of CHRNA3 and of a tail-to-tail overlap between CHRNA3 and CHRNA5.
Duga S.; Solda G.; Asselta R.; Bonati M.T.; Dalpra L.; Malcovati M.; Tenchini M.L.;
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANT ASN-398;

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.