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UniProtKB/Swiss-Prot Q92736: Variant p.Ser4124Thr

Ryanodine receptor 2
Gene: RYR2
Variant information

Variant position:  4124
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
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 Serine (S) to Threonine (T) at position 4124 (S4124T, p.Ser4124Thr).
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 small size and polar (S) to medium size and polar (T)
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

Involvement in disease:  Ventricular tachycardia, catecholaminergic polymorphic, 1, with or without atrial dysfunction and/or dilated cardiomyopathy (CPVT1) [MIM:604772]: An arrhythmogenic disorder characterized by stress-induced, bidirectional ventricular tachycardia that may degenerate into cardiac arrest and cause sudden death. Patients present with recurrent syncope, seizures, or sudden death after physical activity or emotional stress. CPVT1 inheritance is autosomal dominant. {ECO:0000269|PubMed:11157710, ECO:0000269|PubMed:11208676, ECO:0000269|PubMed:12093772, ECO:0000269|PubMed:12106942, ECO:0000269|PubMed:14571276, ECO:0000269|PubMed:15046072, ECO:0000269|PubMed:15046073, ECO:0000269|PubMed:15466642, ECO:0000269|PubMed:15544015, ECO:0000269|PubMed:16188589, ECO:0000269|PubMed:17984046, ECO:0000269|PubMed:24793461, ECO:0000269|PubMed:25372681, ECO:0000269|PubMed:27733687}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In CPVT1; changed ryanodine-sensitive calcium-release channel activity; increased sensitivity to cytosolic calcium activation.
Any additional useful information about the variant.

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

Sequence information

Variant position:  4124
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  4967
The length of the canonical sequence.

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.





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.

Chain 1 – 4967 Ryanodine receptor 2
Topological domain 1 – 4281 Cytoplasmic
Mutagenesis 4108 – 4108 H -> N. Changed ryanodine-sensitive calcium-release channel activity characterized by increased sensitivity to cytosolic calcium activation.
Mutagenesis 4108 – 4108 H -> Q. Changed ryanodine-sensitive calcium-release channel activity characterized by increased sensitivity to cytosolic calcium activation.

Literature citations

Spectrum and prevalence of cardiac ryanodine receptor (RyR2) mutations in a cohort of unrelated patients referred explicitly for long QT syndrome genetic testing.
Tester D.J.; Kopplin L.J.; Will M.L.; Ackerman M.J.;
Heart Rhythm 2:1099-1105(2005)
Cited for: VARIANTS CPVT1 GLN-176; LEU-414; PHE-419; ALA-466; THR-2403; PHE-3800; THR-4124; CYS-4499; THR-4510; THR-4556; VAL-4848 AND GLN-4959;

Enhanced cytosolic Ca2+ activation underlies a common defect of central domain cardiac ryanodine receptor mutations linked to arrhythmias.
Xiao Z.; Guo W.; Sun B.; Hunt D.J.; Wei J.; Liu Y.; Wang Y.; Wang R.; Jones P.P.; Back T.G.; Chen S.R.;
J. Biol. Chem. 291:24528-24537(2016)

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.