UniProtKB/Swiss-Prot Q9UKY4: Variant p.Trp748Ser

Protein O-mannosyl-transferase 2
Gene: POMT2
Chromosomal location: 14q24.3
Variant information

Variant position:  748
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 Tryptophan (W) to Serine (S) at position 748 (W748S, p.Trp748Ser).
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 large size and aromatic (W) to small size and polar (S)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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

Involvement in disease:  Muscular dystrophy-dystroglycanopathy limb-girdle C2 (MDDGC2) [MIM:613158]: An autosomal recessive muscular dystrophy with onset after ambulation is achieved. MDDGC2 is characterized by increased serum creatine kinase and mild muscle weakness. Muscle biopsy shows dystrophic changes, inflammatory changes, and severely decreased alpha-dystroglycan. Cognition is normal. {ECO:0000269|PubMed:17878207, ECO:0000269|PubMed:17923109}. 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 MDDGC2.
Any additional useful information about the variant.

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

Sequence information

Variant position:  748
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  750
The length of the canonical sequence.

Location on the sequence:   VGPLAQDPQSPMAGLRWLDS  W DF
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.

Human                         VGPLAQDPQSPMAGLRWLDSWDF

Mouse                         VGPLAQEPESPMAGLRWLESWDF

Zebrafish                     RGPLAHDSASSMAGLRWMESWEF

Drosophila                    SGPLANEPNSTMYNLKWLSTWEF

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 – 750 Protein O-mannosyl-transferase 2
Alternative sequence 83 – 750 Missing. In isoform 2.

Literature citations

Refining genotype phenotype correlations in muscular dystrophies with defective glycosylation of dystroglycan.
Godfrey C.; Clement E.; Mein R.; Brockington M.; Smith J.; Talim B.; Straub V.; Robb S.; Quinlivan R.; Feng L.; Jimenez-Mallebrera C.; Mercuri E.; Manzur A.Y.; Kinali M.; Torelli S.; Brown S.C.; Sewry C.A.; Bushby K.; Topaloglu H.; North K.; Abbs S.; Muntoni F.;
Brain 130:2725-2735(2007)
Cited for: VARIANTS MDDGA2 ASN-198; PHE-373; PRO-413 AND CYS-666; VARIANTS MDDGC2 MET-184 AND SER-748;

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.