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UniProtKB/Swiss-Prot P16473: Variant p.Ala623Val

Thyrotropin receptor
Gene: TSHR
Variant information

Variant position:  623
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Unclassified
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 Alanine (A) to Valine (V) at position 623 (A623V, p.Ala623Val).
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 hydrophobic (A) to medium size and hydrophobic (V)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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:  In hyperthyroidism; found in toxic thyroid nodules; associated with hyperfunctioning thyroid adenomas; gain of function.
Any additional useful information about the variant.

Sequence information

Variant position:  623
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  764
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 21 – 764 Thyrotropin receptor
Topological domain 603 – 625 Cytoplasmic
Alternative sequence 254 – 764 Missing. In isoform Short.
Alternative sequence 275 – 764 Missing. In isoform 3.

Literature citations

Identification and functional characterization of two new somatic mutations causing constitutive activation of the thyrotropin receptor in hyperfunctioning autonomous adenomas of the thyroid.
Paschke R.; Tonacchera M.; van Sande J.; Parma J.; Vassart G.;
J. Clin. Endocrinol. Metab. 79:1785-1789(1994)

Detection of thyroid-stimulating hormone receptor and G(s)alpha mutations: in 75 toxic thyroid nodules by denaturing gradient gel electrophoresis.
Truelzsch B.; Krohn K.; Wonerow P.; Chey S.; Holzapfel H.-P.; Ackermann F.; Fuehrer D.; Paschke R.;
J. Mol. Med. 78:684-691(2001)
Cited for: VARIANTS ASN-281; ILE-425; THR-453; PHE-486; ASN-505; ARG-512; GLN-512; THR-568; GLY-619; VAL-623; LEU-631; ALA-632; ILE-632; GLU-633; HIS-633; TYR-633; ALA-639 AND PHE-656; CHARACTERIZATION OF VARIANTS ILE-425 AND GLN-512;

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.