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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P08034: Variant p.Thr8Pro

Gap junction beta-1 protein
Gene: GJB1
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Variant information Variant position: help 8 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 Threonine (T) to Proline (P) at position 8 (T8P, p.Thr8Pro). 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 polar (T) to medium size and hydrophobic (P) 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 CMTX1. Any additional useful information about the variant.


Sequence information Variant position: help 8 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 MNWTGLY T LLSGVNRHSTAIGRVWLSVI 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                         MNWTGLYTLLSGVNRHSTAIGRVWLSVI

Mouse                         MNWTGLYTLLSGVNRHSTAIGRVWLSVI

Rat                           MNWTGLYTLLSGVNRHSTAIGRVWLSVI

Bovine                        MNWTGLYTLLSGVNRHSTAIGRVWLSVI

Horse                         MNWTGLYTLLSGVNRHSTAIGRVWLSVI

Xenopus laevis                MNWAGLYAILSGVNRHSTSIGRIWLSVV
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 1 – 22 Cytoplasmic
Turn 6 – 9



Literature citations
Mutations in the peripheral myelin genes and associated genes in inherited peripheral neuropathies.
Nelis E.; Haites N.; van Broeckhoven C.;
Hum. Mutat. 13:11-28(1999)
Cited for: VARIANTS CMTX1 GLY-11; PRO-39; PHE-81; PRO-83; CYS-135; ILE-149; SER-158 AND ARG-173; Connexin32 gene mutations in X-linked dominant Charcot-Marie-Tooth disease (CMTX1).
Janssen E.A.M.; Kemp S.; Hensels G.W.; Sie O.G.; de Die-Smulders C.E.M.; Hoogendijk J.E.; de Visser M.; Bolhuis P.A.;
Hum. Genet. 99:501-505(1997)
Cited for: VARIANTS CMTX1 TRP-15; ILE-63; CYS-65; SER-87; PRO-89; MET-139 AND ARG-199; 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; Charcot-Marie-Tooth disease type I and related demyelinating neuropathies: mutation analysis in a large cohort of Italian families.
Mostacciuolo M.L.; Righetti E.; Zortea M.; Bosello V.; Schiavon F.; Vallo L.; Merlini L.; Siciliano G.; Fabrizi G.M.; Rizzuto N.; Milani M.; Baratta S.; Taroni F.;
Hum. Mutat. 18:32-41(2001)
Cited for: VARIANTS CMTX1 CYS-7; PRO-8; GLN-22; PRO-25; ASN-30; CYS-59; MET-139; LEU-143 DEL; SER-151; TRP-164 AND LEU-184;
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.