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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P11217: Variant p.Trp798Arg

Glycogen phosphorylase, muscle form
Gene: PYGM
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Variant information Variant position: help 798 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 Tryptophan (W) to Arginine (R) at position 798 (W798R, p.Trp798Arg). 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 aromatic (W) to large size and basic (R) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 GSD5. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 798 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 842 The length of the canonical sequence.
Location on the sequence: help YEDYIKCQEKVSALYKNPRE W TRMVIRNIATSGKFSSDRTI 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                         YEDYIKCQEKVSALYKNPREWTRMVIRNIATSGKFSSDRTI

Mouse                         YEEYIKCQDKVSELYKNPREWTRMVIRNIATSGKFSSDRTI

Rat                           YEEYIKCQDKVSELYKNPREWTRMVIRNIATSGKFSSDRTI

Bovine                        YEEYIKCQERVSALYKNPREWTRMVIRNIATSGKFSSDRTI

Rabbit                        YEEYVKCQERVSALYKNPREWTRMVIRNIATSGKFSSDRTI

Sheep                         YEEYVKCQERVSALYKNPREWTRMVIRNIATSGKFSSDRTI
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 2 – 842 Glycogen phosphorylase, muscle form
Helix 795 – 806



Literature citations
A novel missense mutation (W797R) in the myophosphorylase gene in Spanish patients with McArdle disease.
Fernandez R.; Navarro C.; Andreu A.L.; Bruno C.; Shanske S.; Gamez J.; Teijeira S.; Hernandez I.; Teijeiro A.; Fernandez J.M.; Musumeci O.; DiMauro S.;
Arch. Neurol. 57:217-219(2000)
Cited for: VARIANT GSD5 ARG-798; A missense mutation W797R in the myophosphorylase gene in a Spanish patient with McArdle's disease.
Rubio J.C.; Martin M.A.; Campos Y.; Auciello R.; Cabello A.; Arenas J.;
Muscle Nerve 23:129-131(2000)
Cited for: VARIANT GSD5 ARG-798; Molecular heterogeneity of myophosphorylase deficiency (McArdle's disease): a genotype-phenotype correlation study.
Martin M.A.; Rubio J.C.; Buchbinder J.; Fernandez-Hojas R.; del Hoyo P.; Teijeira S.; Gamez J.; Navarro C.; Fernandez J.M.; Cabello A.; Campos Y.; Cervera C.; Culebras J.M.; Andreu A.L.; Fletterick R.J.; Arenas J.;
Ann. Neurol. 50:574-581(2001)
Cited for: VARIANTS GSD5 PRO-116; TRP-194; SER-205; LYS-349; ASN-488; TRP-602; ASP-660; TYR-685; VAL-704 AND ARG-798;
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.