UniProtKB/Swiss-Prot O75923: Variant p.Ile284Thr

Gene: DYSF
Chromosomal location: 2p13.1-p13.3
Variant information

Variant position:  284
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 Isoleucine (I) to Threonine (T) at position 284 (I284T, p.Ile284Thr).
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 medium size and hydrophobic (I) 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:  Limb-girdle muscular dystrophy 2B (LGMD2B) [MIM:253601]: An autosomal recessive degenerative myopathy characterized by weakness and atrophy starting in the proximal pelvifemoral muscles, with onset in the late teens or later, massive elevation of serum creatine kinase levels and slow progression. Scapular muscle involvement is minor and not present at onset. Upper limb girdle involvement follows some years after the onset in lower limbs. {ECO:0000269|PubMed:10196377, ECO:0000269|PubMed:11134403, ECO:0000269|PubMed:14678801, ECO:0000269|PubMed:15469449, ECO:0000269|PubMed:16010686, ECO:0000269|PubMed:16100712, ECO:0000269|PubMed:16705711, ECO:0000269|PubMed:16996541, ECO:0000269|PubMed:17185750, ECO:0000269|PubMed:17287450, ECO:0000269|PubMed:18306167, ECO:0000269|PubMed:18853459, ECO:0000269|PubMed:9731526}. 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 LGMD2B.
Any additional useful information about the variant.

Sequence information

Variant position:  284
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2080
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 – 2080 Dysferlin
Topological domain 1 – 2046 Cytoplasmic
Domain 207 – 302 C2 2

Literature citations

Analysis of the DYSF mutational spectrum in a large cohort of patients.
Krahn M.; Beroud C.; Labelle V.; Nguyen K.; Bernard R.; Bassez G.; Figarella-Branger D.; Fernandez C.; Bouvenot J.; Richard I.; Ollagnon-Roman E.; Bevilacqua J.A.; Salvo E.; Attarian S.; Chapon F.; Pellissier J.-F.; Pouget J.; Hammouda el H.; Laforet P.; Urtizberea J.A.; Eymard B.; Leturcq F.; Levy N.;
Hum. Mutat. 30:E345-E375(2009)
Cited for: VARIANTS LGMD2B ARG-52; ARG-155; GLU-170; GLU-234; THR-284; TRP-555; ARG-618; ARG-731; CYS-930; GLN-1022; PRO-1228; THR-1526; ASP-1543; TRP-1768; SER-1970 AND CYS-2042; VARIANTS MMD1 GLU-299; 386-PHE--ASP-390 DELINS TYR; ARG-426; TRP-456; TRP-555; LEU-1029; HIS-1046; HIS-1046; GLN-1693; 1938-THR-ALA-1939 DEL AND CYS-2042; VARIANTS GLU-170; TRP-253 AND TRP-555; VARIANTS PROXIMODISTAL MYOPATHY ARG-299; ARG-340; VAL-1748; TRP-1768 AND CYS-2042; VARIANT PSEUDOMETABOLIC MYOPATHY PRO-266; VARIANTS VAL-84; VAL-189; ALA-335; LEU-374; ASN-390; GLN-819; GLN-1038; VAL-1276; VAL-1325; ASN-1837 AND SER-1967;

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.