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UniProtKB/Swiss-Prot P39210: Variant p.Gln93Pro

Protein Mpv17
Gene: MPV17
Variant information

Variant position:  93
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 Glutamine (Q) to Proline (P) at position 93 (Q93P, p.Gln93Pro).
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 polar (Q) to medium size and hydrophobic (P)
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

Variant description:  In MTDPS6; results in altered ribonucleotide incorporation in mtDNA from patient fibroblasts.
Any additional useful information about the variant.



Sequence information

Variant position:  93
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:   LDRFIPGTTKVDALKKMLLD  Q GGFAPCFLGCFLPLVGALNG
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                         LDRFIPGTTKVD--ALKKMLLDQGGFAPCFLGCFLPLVGALNG

Mouse                         LDHLIPGTTKVH--ALKKMLLDQGGFAPCFLGCFLPLVGIL

Rat                           LDHLIPGTTKVN--ALKKMLLDQGGFAPCFLGCFLPLVGVL

Bovine                        LDRLIPGTTKVD--ALKKMLLDQGGFAPCFLGCFLPLVGTL

Xenopus laevis                LDRIIPGSGKPV--ALKKMLLDQVAFAPCFLGCFLSIASAL

Zebrafish                     LDKLVTGGTKSA--ALKKMLVDQVGFAPCFLGAFLGITGTL

Caenorhabditis elegans        LEKVKGNNKSLL--LVKKLCIDQLCFSPCFNAAILFNLRLL

Drosophila                    LESRVPKTYSPMRRGVTKMLVDQTLFAPPFTMAMSFLVPLS

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
Site 92 – 92 Determines ion selectivity
Mutagenesis 80 – 80 T -> A. Does not affect gating properties of the channel.
Mutagenesis 92 – 92 D -> K. Affects ion selectivity of the channel.
Mutagenesis 99 – 99 C -> A. Does not affect conductance and gating properties of the channel.


Literature citations

Clinical, biochemical, cellular and molecular characterization of mitochondrial DNA depletion syndrome due to novel mutations in the MPV17 gene.
Uusimaa J.; Evans J.; Smith C.; Butterworth A.; Craig K.; Ashley N.; Liao C.; Carver J.; Diot A.; Macleod L.; Hargreaves I.; Al-Hussaini A.; Faqeih E.; Asery A.; Al Balwi M.; Eyaid W.; Al-Sunaid A.; Kelly D.; van Mourik I.; Ball S.; Jarvis J.; Mulay A.; Hadzic N.; Samyn M.; Baker A.; Rahman S.; Stewart H.; Morris A.A.; Seller A.; Fratter C.; Taylor R.W.; Poulton J.;
Eur. J. Hum. Genet. 22:184-191(2014)
Cited for: VARIANTS MTDPS6 ARG-21; PRO-23; PRO-36; TRP-41; 44-GLN--LEU-176 DEL; ARG-64; PRO-93 AND LEU-98;

Nucleotide pools dictate the identity and frequency of ribonucleotide incorporation in mitochondrial DNA.
Berglund A.K.; Navarrete C.; Engqvist M.K.; Hoberg E.; Szilagyi Z.; Taylor R.W.; Gustafsson C.M.; Falkenberg M.; Clausen A.R.;
PLoS Genet. 13:E1006628-E1006628(2017)
Cited for: CHARACTERIZATION OF VARIANTS MTDPS6 PRO-23 AND PRO-93;

MPV17-related mitochondrial DNA maintenance defect: New cases and review of clinical, biochemical, and molecular aspects.
El-Hattab A.W.; Wang J.; Dai H.; Almannai M.; Staufner C.; Alfadhel M.; Gambello M.J.; Prasun P.; Raza S.; Lyons H.J.; Afqi M.; Saleh M.A.M.; Faqeih E.A.; Alzaidan H.I.; Alshenqiti A.; Flore L.A.; Hertecant J.; Sacharow S.; Barbouth D.S.; Murayama K.; Shah A.A.; Lin H.C.; Wong L.C.;
Hum. Mutat. 39:461-470(2018)
Cited for: VARIANTS MTDPS6 ARG-21; TRP-50; LYS-88 DEL; LEU-91 DEL; GLY-92; PRO-93; ASP-95; LEU-98; 99-CYS--LEU-176 DEL AND MET-154;

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.