mitochondrial DNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria
Findings
No curated finding names mitochondrial DNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Mitochondrial DNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria is characterized by the association of a mitochondrial encephalomyopathy and an aminoacidopathy. It has been described in two brothers presenting with developmental delay, neurological signs, deafness, exercise intolerance, lactic acidosis and elevation of several plasmatic amino acids. Mitochondria morphology was found to be abnormal on muscle biopsy. Transmission is likely to be linked to maternal mitochondrial DNA.
Definition from the Mondo Disease Ontology (MONDO:0012791), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal recessive inheritance
- Onset and course
- Infantile onset
HPO, annotations 2026-09-02
Features
41 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- DystoniaHPOHP:0001332
- 12 of 12 reported patients
- Generalized-onset seizureHPOHP:0002197
- 2 of 2 reported patients
- Hyperkinetic movementsHPOHP:0002487
- 12 of 12 reported patients
- HypotoniaHPOHP:0001252
- 14 of 14 reported patients
- Increased CSF lactateHPOHP:0002490
- 4 of 4 reported patients
- Methylmalonic acidemiaHPOHP:0002912
Genes
1 gene
Germline variants in the gene encoding each protein, as classified by GenCC submitters, each in their own words. Limited, disputed and refuted submissions are listed too.
- SUCLA2HGNC:11448
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2021
- Strong · PanelApp Australia · Autosomal recessive · 2025
- Supportive · Orphanet · Mitochondrial · 2021
Where it sits
Other names
5 names
Resolves to: mitochondrial DNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria
- Also called
- booth-Haworth-Dilling syndromemitochondrial DNA depletion syndrome 5mitochondrial DNA depletion syndrome type 5mitochondrial encephalomyopathy-aminoacidopathy syndromemtDNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria