UniProtKB/Swiss-Prot P39210: Variant p.Arg50Trp

Protein Mpv17
Gene: MPV17
Chromosomal location: 2p21-p23
Variant information

Variant position:  50
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 have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Arginine (R) to Tryptophan (W) at position 50 (R50W, p.Arg50Trp).
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

Involvement in disease:  Mitochondrial DNA depletion syndrome 6 (MTDPS6) [MIM:256810]: A disease due to mitochondrial dysfunction. It is characterized by infantile onset of progressive liver failure, often leading to death in the first year of life, peripheral neuropathy, corneal scarring, acral ulceration and osteomyelitis leading to autoamputation, cerebral leukoencephalopathy, failure to thrive, and recurrent metabolic acidosis with intercurrent infections. 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 MTDPS6.
Any additional useful information about the variant.



Sequence information

Variant position:  50
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  176
The length of the canonical sequence.

Location on the sequence:   GDIISQQLVERRGLQEHQRG  R TLTMVSLGCGFVGPVVGGWY
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                         GDIISQQLVERRGLQEHQRGRTLTMVSLGCGFVGPVVGGWY

Mouse                         GDMISQQLVERRGLQQHQAGRTLTMVSLGCGFVGPVVGGWY

Rat                           GDIISQQLVERRGLQQHQTGRTLTMASLGCGFVGPVVGGWY

Bovine                        GDVISQQLVERRGLQAHQAGRTLTMASLGCGFVGPVVGGWY

Xenopus laevis                GDVISQQLLERKGLKGHSIERTVKMMGIGFCFVGPVVGGWY

Zebrafish                     GDVISQQLIERRGLANHNARRTAKMMSIGFFFVGPVVGGWY

Caenorhabditis elegans        GDCLAQYLSHN---QEWDRWRTARFSFLSSCFMAPSLFIWF

Drosophila                    GDTISQFFFDKKSLDEWDAGRTLRFGIVGLVFVGPTLRRWY

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.

TypePositionsDescription
Chain 1 – 176 Protein Mpv17


Literature citations

MPV17 encodes an inner mitochondrial membrane protein and is mutated in infantile hepatic mitochondrial DNA depletion.
Spinazzola A.; Viscomi C.; Fernandez-Vizarra E.; Carrara F.; D'Adamo P.; Calvo S.; Marsano R.M.; Donnini C.; Weiher H.; Strisciuglio P.; Parini R.; Sarzi E.; Chan A.; Dimauro S.; Rotig A.; Gasparini P.; Ferrero I.; Mootha V.K.; Tiranti V.; Zeviani M.;
Nat. Genet. 38:570-575(2006)
Cited for: VARIANTS MTDPS6 TRP-50; GLN-50 AND LYS-166; SUBCELLULAR LOCATION; TISSUE SPECIFICITY;

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.