UniProtKB/SwissProt variant VAR

Variant information

Variant position:

801

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 Glycine (G) to Aspartate (D) at position 801 (G801D, p.Gly801Asp).

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 glycine (G) to medium size and acidic (D)

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:

Mannosidosis, alpha B, lysosomal (MANSA) [MIM:248500]: A lysosomal storage disease characterized by accumulation of unbranched oligosaccharide chains. This accumulation is expressed histologically as cytoplasmic vacuolation predominantly in the CNS and parenchymatous organs. Depending on the clinical findings at the age of onset, a severe infantile (type I) and a mild juvenile (type II) form of alpha-mannosidosis are recognized. There is considerable variation in the clinical expression with mental retardation, recurrent infections, impaired hearing and Hurler-like skeletal changes being the most consistent abnormalities. {ECO:0000269|PubMed:12718372, ECO:0000269|PubMed:15712269, ECO:0000269|PubMed:22161967, ECO:0000269|PubMed:9158146, ECO:0000269|PubMed:9758606, ECO:0000269|PubMed:9915946}. 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 MANSA; no residual enzyme activity.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs864621994 [ dbSNP | Ensembl ]

Sequence information

Variant position:

801

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

Protein sequence length:

1011

The length of the canonical sequence.

Location on the sequence:

RIYITDGNMQLTVLTDRSQG G SSLRDGSLELMVHRRLLKDD

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                         RIYITDGNMQLTVLTDRSQGGSSLRDGSLELMVHRRLLKDD

Mouse                         RIYITDGQMQLTVLTDRSQGGSSLQDGSLELMVHRRLLVDD

Bovine                        RIYITDGNMQLTVLTDRSQGGSSLRDGSLELMVHRRLLKDD

Cat                           RIYIRDGNMQLTVLTDRSQGGSSLRDGSMELMVHRRLLKDD

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.

Type	Positions	Description
Chain	50 – 1011	Lysosomal alpha-mannosidase
Chain	602 – 882	Lysosomal alpha-mannosidase D peptide

Literature citations

Identification and characterization of five novel MAN2B1 mutations in Italian patients with alpha-mannosidosis.
Sbaragli M.; Bibi L.; Pittis M.G.; Balducci C.; Heikinheimo P.; Ricci R.; Antuzzi D.; Parini R.; Spaccini L.; Bembi B.; Beccari T.;
Hum. Mutat. 25:320-320(2005)
Cited for: VARIANTS MANSA LEU-200 AND ASP-801; CHARACTERIZATION OF VARIANTS MANSA LEU-200 AND ASP-801;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O00754: Variant p.Gly801Asp