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UniProtKB/Swiss-Prot P03897: Variant p.Gln26Lys

NADH-ubiquinone oxidoreductase chain 3
Gene: MT-ND3
Variant information

Variant position:  26
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
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 Lysine (K) at position 26 (Q26K, p.Gln26Lys).
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 large size and basic (K)
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 LS; unknown pathological significance; decrease in enzyme activity.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  26
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  115
The length of the canonical sequence.

Location on the sequence:   ILMINTLLALLLMIITFWLP  Q LNGYMEKSTPYECGFDPMSP
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                         ILMINTLLALLLMIITFWLPQLNGYMEKSTPYECGFDPMSP

Gorilla                       ILMTNTLLALLLMIITFWLPQLNSYMEKTNPYECGFDPVSP

                              TLMTNVTLASLLVLIAFWLPQLNIYTDKTSPYECGFDPMGS

Chimpanzee                    ILMTNTLLALLLMIITFWLPQLNSYMEKSTPYECGFDPMSP

Mouse                         VIFINILLSLTLILVAFWLPQMNLYSEKANPYECGFDPTSS

Rat                           IITINITLSFILISIAFWLPQMNLYSEKANPYECGFDPTSS

Pig                           TLLTNVTLASLLVLIAFWLPQLNAYSEKTSPYECGFDPMGS

Bovine                        ALLTNFTLATLLVIIAFWLPQLNVYSEKTSPYECGFDPMGS

Rabbit                        VLLINTTISLVLVTIAFWLPQLNIYSEKSSPYECGFDPMGS

Sheep                         TLLTNFTLATLLVTIAFWLPQLNVYSEKTSPYECGFDPMGS

Cat                           ALLTNTLLSTLLVLIAFWLPQLNIYAEKASPYECGFDPMGS

Horse                         TLLTNTLLASLLVLIAFWLPQLNIYAEKTSPYECGFDPMGS

Chicken                       MLSLSFLLSAALTTMNFWLAQMAPDTEKLSPYECGFDPLGS

Xenopus laevis                ILMIAMTLSTILAILSFWLPQMTPDMEKLSPYECGFDPLGS

Zebrafish                     ILIIMTTLSLVLALVSFWLPQMNSDTEKLSPYECGFDPLGS

Caenorhabditis elegans        VLVFTLVLLFAFYLINFLLSIKDMGKNKISAFECGFVSVGK

Drosophila                    ALLILLITTIVMFLASILSKKALIDREKSSPFECGFDPKSS

Slime mold                    LLAISTGLSVILFFLGYFLMFKVAYEDKLMGYECGFDPFGN

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 – 115 NADH-ubiquinone oxidoreductase chain 3


Literature citations

Rapid identification of a novel complex I MT-ND3 m.10134C>A mutation in a Leigh syndrome patient.
Miller D.K.; Menezes M.J.; Simons C.; Riley L.G.; Cooper S.T.; Grimmond S.M.; Thorburn D.R.; Christodoulou J.; Taft R.J.;
PLoS ONE 9:e104879-e104879(2014)
Cited for: VARIANT LS LYS-26; CHARACTERIZATION OF VARIANT LS LYS-26; FUNCTION; CATALYTIC ACTIVITY;

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.