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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P29033: Variant p.Asp179Asn

Gap junction beta-2 protein
Gene: GJB2
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Variant information Variant position: help 179 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 Aspartate (D) to Asparagine (N) at position 179 (D179N, p.Asp179Asn). 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 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: help 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
Variant description: help In DFNA3A. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 179 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 226 The length of the canonical sequence.
Location on the sequence: help DGFSMQRLVKCNAWPCPNTV D CFVSRPTEKTVFTVFMIAVS 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                         DGFSMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVS

Gorilla                       DGFSMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVS

Rhesus macaque                DGFSMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVS

Mouse                         NGFFMQRLVKCNAWPCPNTVDCFISRPTEKTVFTVFMISVS

Rat                           NGFFMQRLVKCNAWPCPNTVDCFISRPTEKTVFTVFMISVS

Bovine                        DGFAMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVS

Sheep                         DGFAMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVS
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 – 226 Gap junction beta-2 protein
Topological domain 157 – 189 Extracellular
Disulfide bond 53 – 180
Beta strand 178 – 181



Literature citations
A novel dominant missense mutation -- D179N -- in the GJB2 gene (connexin 26) associated with non-syndromic hearing loss.
Primignani P.; Castorina P.; Sironi F.; Curcio C.; Ambrosetti U.; Coviello D.A.;
Clin. Genet. 63:516-521(2003)
Cited for: VARIANT DFNA3A ASN-179; VARIANT DFNB1A ILE-37;
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.