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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P08034: Variant p.Val139Met

Gap junction beta-1 protein
Gene: GJB1
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Variant information Variant position: help 139 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 Valine (V) to Methionine (M) at position 139 (V139M, p.Val139Met). 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 Similar physico-chemical property. Both residues are medium size and hydrophobic. 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.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 139 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 EVKRHKVHISGTLWWTYVIS V VFRLLFEAVFMYVFYLLYPG 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                         EVKRHKVHISGTLWWTYVISVVFRLLFEAVFMYVFYLLYPG

Mouse                         EVKRHKVHISGTLWWTYVISVVFRLLFEAVFMYVFYLLYPG

Rat                           EVKRHKVHISGTLWWTYVISVVFRLLFEAVFMYVFYLLYPG

Bovine                        EVKRHKVHISGTLWWTYVISVVFRLLFEAAFMYVFYLLYPG

Horse                         EVKRHKVHISGTLWWTYVISVVFRLLFEAAFMYVFYLLYPG

Xenopus laevis                EVKKHKVKISGTLWWTYISSVFFRIIFEAAFMYIFYLIYPG

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
Transmembrane 131 – 153 Helical



Literature citations
Connexin mutations in X-linked Charcot-Marie-Tooth disease.
Bergoffen J.; Schere S.S.; Wang S.; Oronzi Scott M.; Bone L.J.; Paul D.L.; Chen K.; Lensch M.W.; Chance P.F.; Fischbeck K.H.;
Science 262:2039-2042(1993)
Cited for: VARIANTS CMTX1 SER-12; MET-139; TRP-142; ARG-156; SER-172 AND LYS-186; 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; Screening for connexin 32 mutations in Charcot-Marie-Tooth disease families with possible X-linked inheritance.
Silander K.; Meretoja P.; Pihko H.; Juvonen V.; Issakainen J.; Aula P.; Savontaus M.L.;
Hum. Genet. 100:391-397(1997)
Cited for: VARIANTS CMTX1 GLN-22; GLN-75; TRP-75; TRP-107; MET-139 AND VAL-194; 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; HMSN and HNPP. Laboratory service provision in the south west of England -- two years' experience.
Williams M.M.; Tyfield L.A.; Jardine P.; Lunt P.W.; Stevens D.L.; Turnpenny P.D.;
Ann. N. Y. Acad. Sci. 883:500-503(1999)
Cited for: VARIANTS CMTX1 GLN-22; VAL-39; MET-43; PHE-60; THR-104; MET-139; GLN-142; TRP-142; VAL-149 AND GLU-177; 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; Molecular analysis in Japanese patients with Charcot-Marie-Tooth disease: DGGE analysis for PMP22, MPZ, and Cx32/GJB1 mutations.
Numakura C.; Lin C.; Ikegami T.; Guldberg P.; Hayasaka K.;
Hum. Mutat. 20:392-398(2002)
Cited for: VARIANTS CMTX1 TRP-75; GLN-75; VAL-120 DEL; MET-139; LYS-146; ASP-147; VAL-209 DEL AND CYS-264; 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.