UniProtKB/Swiss-Prot P40926: Variant p.Pro207Leu

Malate dehydrogenase, mitochondrial
Gene: MDH2
Chromosomal location: 7cen-q22
Variant information

Variant position:  207
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 Proline (P) to Leucine (L) at position 207 (P207L, p.Pro207Leu).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
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:  Epileptic encephalopathy, early infantile, 51 (EIEE51) [MIM:617339]: A form of epileptic encephalopathy, a heterogeneous group of severe childhood onset epilepsies characterized by refractory seizures, neurodevelopmental impairment, and poor prognosis. Development is normal prior to seizure onset, after which cognitive and motor delays become apparent. EIEE51 is an autosomal recessive form characterized by onset of intractable seizures and hypotonia in the first days or weeks of life, and severely delayed psychomotor development. {ECO:0000269|PubMed:27989324}. 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 EIEE51; decreased protein abundance; strong decrease in malate dehydrogenase activity; severe defects in aerobic respiration, when assayed in a heterologous system.
Any additional useful information about the variant.

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



Sequence information

Variant position:  207
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  338
The length of the canonical sequence.

Location on the sequence:   LDPARVNVPVIGGHAGKTII  P LISQCTPKVDFPQDQLTALT
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                         LDPARVNVPVIGGHAGKTIIPLISQCTPKVDFPQDQLTALT

Mouse                         LDPARVNVPVIGGHAGKTIIPLISQCTPKVDFPQDQLATLT

Rat                           LDPARVNVPVIGGHAGKTIIPLISQCTPKVDFPQDQLATLT

Pig                           LDPARVSVPVIGGHAGKTIIPLISQCTPKVDFPQDQLSTLT

Bovine                        LDPARVNVPVIGGHAGKTIIPLISQCTPKVEFPQDQLTTLT

Cat                           LDPARVNVPVIGGHAGKTIIPLISQCTPKVDLPQDQLTAVT

Caenorhabditis elegans        HDASKTVVPVVGGHAGITIIPLLSQVKPSTKFSEEEISKLT

Baker's yeast                 TDPTQERVNVIGGHSGITIIPLISQTNHKL-MSDDKRHELI

Fission yeast                 GKAELLHIPVVGGHSGATIVPLLSQ--GGVELTGEKRDALI

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 25 – 338 Malate dehydrogenase, mitochondrial
Active site 200 – 200 Proton acceptor
Modified residue 203 – 203 N6-succinyllysine
Modified residue 215 – 215 N6-acetyllysine; alternate
Modified residue 215 – 215 N6-succinyllysine; alternate
Beta strand 205 – 207


Literature citations

Mutations in MDH2, encoding a Krebs cycle enzyme, cause early-onset severe encephalopathy.
Ait-El-Mkadem S.; Dayem-Quere M.; Gusic M.; Chaussenot A.; Bannwarth S.; Francois B.; Genin E.C.; Fragaki K.; Volker-Touw C.L.; Vasnier C.; Serre V.; van Gassen K.L.; Lespinasse F.; Richter S.; Eisenhofer G.; Rouzier C.; Mochel F.; De Saint-Martin A.; Abi Warde M.T.; de Sain-van der Velde M.G.; Jans J.J.; Amiel J.; Avsec Z.; Mertes C.; Haack T.B.; Strom T.; Meitinger T.; Bonnen P.E.; Taylor R.W.; Gagneur J.; van Hasselt P.M.; Roetig A.; Delahodde A.; Prokisch H.; Fuchs S.A.; Paquis-Flucklinger V.;
Am. J. Hum. Genet. 100:151-159(2017)
Cited for: INVOLVEMENT IN EIEE51; VARIANTS EIEE51 ARG-37; LEU-133 AND LEU-207; CHARACTERIZATION OF VARIANTS EIEE51 LEU-133 AND LEU-207; 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.