UniProtKB/SwissProt variant VAR

Variant information

Variant position:

283

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

Type of variant:

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:

From Arginine (R) to Tryptophan (W) at position 283 (R283W, p.Arg283Trp).

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 basic (R) to large size and aromatic (W)

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

Variant description:

In CMT4B1.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs1590983932 [ dbSNP | Ensembl ]

Sequence information

Variant position:

283

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

Protein sequence length:

643

The length of the canonical sequence.

Location on the sequence:

SRGRIPVLSWIHPESQATIT R CSQPMVGVSGKRSKEDEKYL

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                         SRGRIPVLSWIHPESQATITRCSQPMVGVSGKRSKEDEKYL

Mouse                         SRGRIPVLSWIHPESQATVTRCSQPMVGVSGKRSKEDEKYL

Bovine                        SRGRIPVLSWIHPESQATITRCSQPMVGVSGKRSKEDEKYL

Chicken                       SRGRIPVLSWIHPESQATITRCSQPMVGVSGKRSKEDEKYL

Zebrafish                     AKGRIPVLSWIHPESQAAVVRSSQPMVGQNGRRCKEDEKLL

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	1 – 643	Myotubularin-related protein 2
Domain	205 – 580	Myotubularin phosphatase
Beta strand	280 – 284

Literature citations

A novel homozygous missense mutation in the myotubularin-related protein 2 gene associated with recessive Charcot-Marie-Tooth disease with irregularly folded myelin sheaths.
Nelis E.; Erdem S.; Tan E.; Loefgren A.; Ceuterick C.; De Jonghe P.; Van Broeckhoven C.; Timmerman V.; Topaloglu H.;
Neuromuscul. Disord. 12:869-873(2002)
Cited for: VARIANT CMT4B1 TRP-283;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q13614: Variant p.Arg283Trp