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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P08034: Variant p.Arg183His

Gap junction beta-1 protein
Gene: GJB1
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Variant information Variant position: help 183 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 Histidine (H) at position 183 (R183H, p.Arg183His). 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 medium size and polar (H) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 CMTX1. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 183 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 283 The length of the canonical sequence.
Location on the sequence: help VRLVKCDVYPCPNTVDCFVS R PTEKTVFTVFMLAASGICII 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                         VRLVKCDVYPCPNTVDCFVSRPTEKTVFTVFMLAASGICII

Mouse                         VRLVKCEAFPCPNTVDCFVSRPTEKTVFTVFMLAASGICII

Rat                           VRLVKCEAFPCPNTVDCFVSRPTEKTVFTVFMLAASGICII

Bovine                        VRLVKCDAYPCPNTVDCFVSRPTEKTIFTVFMLAASGICII

Horse                         VRLVKCDAYPCPNTVDCFVSRPTEKTVFTVFMLAASGICII

Xenopus laevis                IRLLKCDAYPCPNTVDCFVSRPTEKTIFTVFMLVASGVCIV

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 – 283 Gap junction beta-1 protein
Topological domain 154 – 191 Extracellular



Literature citations
Mutational analysis of the MPZ, PMP22 and Cx32 genes in patients of Spanish ancestry with Charcot-Marie-Tooth disease and hereditary neuropathy with liability to pressure palsies.
Bort S.; Nelis E.; Timmerman V.; Sevilla T.; Cruz-Martinez A.; Martinez F.; Millan J.M.; Arpa J.; Vilchez J.J.; Prieto F.; van Broeckhoven C.; Palau F.;
Hum. Genet. 99:746-754(1997)
Cited for: VARIANTS CMTX1 ALA-23; SER-64; SER-87; TRP-164; GLN-164; SER-183; HIS-183; CYS-183 AND TRP-215; Connexin32 and X-linked Charcot-Marie-Tooth disease.
Bone L.J.; Deschenes S.M.; Balice-Gordon R.J.; Fischbeck K.H.; Scherer S.S.;
Neurobiol. Dis. 4:221-230(1997)
Cited for: VARIANTS CMTX1 ARG-3; SER-3; CYS-7; SER-12; LEU-13; MET-13; LYS-14; GLN-15; TRP-15; PRO-16; SER-20; ASP-21; GLN-22; PRO-22; GLY-22; ALA-23; PHE-25; LEU-26; ASN-28; THR-28; LEU-29; ASN-30; THR-34; VAL-34; MET-35; MET-38; VAL-40; LYS-41; LEU-44; TYR-49; SER-53; PHE-56; PHE-60; ILE-63; SER-64; CYS-65; GLN-75; PRO-75; TRP-75; SER-77; ARG-80; CYS-85; PHE-85; ALA-86; ASN-86; SER-86; ALA-87; LEU-87; SER-87; PRO-89; HIS-90; VAL-93; GLN-94; TYR-94; MET-95; TYR-100; GLY-102; GLU-103; TRP-107; 111-HIS--HIS-116 DEL; ASN-124; PRO-128; ARG-133; MET-139; TRP-142; GLU-142; LEU-143 DEL; ARG-156; PHE-156; CYS-157; ALA-158; ARG-158; HIS-160; PRO-161; TRP-164; GLN-164; SER-172; LEU-172; TYR-178; ARG-179; LEU-180; MET-181; THR-182; CYS-183; SER-183; HIS-183; THR-185 DEL; LYS-186; GLU-187; GLY-189; ILE-189; 191-THR--PHE-193 DEL; CYS-193; PHE-198; ARG-199; ARG-201; VAL-204; SER-205; LYS-208; TRP-215; CYS-219; HIS-219; GLY-220; CYS-230; LEU-230; CYS-235 AND HIS-238; Screening for mutations in the peripheral myelin genes PMP22, MPZ and Cx32 (GJB1) in Russian Charcot-Marie-Tooth neuropathy patients.
Mersiyanova I.V.; Ismailov S.M.; Polyakov A.V.; Dadali E.L.; Fedotov V.P.; Nelis E.; Loefgren A.; Timmerman V.; Van Broeckhoven C.; Evgrafov O.V.;
Hum. Mutat. 15:340-347(2000)
Cited for: VARIANTS CMTX1 20-ILE-GLY-21 DELINS ASN-SER; LYS-34; ARG-80; VAL-90; VAL-93; TRP-107; TRP-142; GLN-164; HIS-183; LYS-186; LEU-193 AND LYS-208; Demyelinating and axonal features of Charcot-Marie-Tooth disease with mutations of myelin-related proteins (PMP22, MPZ and Cx32): a clinicopathological study of 205 Japanese patients.
Hattori N.; Yamamoto M.; Yoshihara T.; Koike H.; Nakagawa M.; Yoshikawa H.; Ohnishi A.; Hayasaka K.; Onodera O.; Baba M.; Yasuda H.; Saito T.; Nakashima K.; Kira J.; Kaji R.; Oka N.; Sobue G.;
Brain 126:134-151(2003)
Cited for: VARIANTS CMTX1 LEU-26; ALA-55; HIS-57; ILE-63; LEU-69; MET-139; GLN-142; TRP-142; ARG-172; ALA-177; HIS-183; ALA-191 AND TYR-201;
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.