mitochondrial complex III deficiency nuclear type 1
Findings
No curated finding names mitochondrial complex III deficiency nuclear type 1 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Any mitochondrial complex III deficiency in which the cause of the disease is a mutation in the BCS1L gene.
Definition from the Mondo Disease Ontology (MONDO:0007415), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal recessive inheritance
- Onset and course
- Congenital onset · Neonatal death
HPO, annotations 2026-09-02
Features
26 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.
- Decreased activity of mitochondrial complex IIIHPOHP:0011924
- 2 of 2 reported patients
- Decreased liver functionHPOHP:0001410
- 2 of 2 reported patients
- Elevated circulating hepatic transaminase concentrationHPOHP:0002910
- 2 of 2 reported patients
- Elevated lactate:pyruvate ratioHPOHP:0032653
- 2 of 2 reported patients
- Failure to thriveHPOHP:0001508
- 1 of 1 reported patient
- Global developmental delayHPOHP:0001263
- 1 of 1 reported patient
- Hypoglycemia
Show the remaining 14
- AminoaciduriaHPOHP:0003355
- 1 of 2 reported patients
- Axial hypotoniaHPOHP:0008936
- 1 of 2 reported patients
- Cerebellar atrophyHPOHP:0001272
- 1 of 2 reported patients
- CholestasisHPOHP:0001396
- 1 of 2 reported patients
- Delayed CNS myelinationHPOHP:0002188
- 1 of 2 reported patients
- Elevated circulating alkaline phosphatase concentrationHPOHP:0003155
- 1 of 2 reported patients
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.
- BCS1LHGNC:1020
- Definitive · Natera · Autosomal recessive · 2023
- Strong · Ambry Genetics · Autosomal recessive · 2018
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2023
- Strong · PanelApp Australia · Autosomal recessive · 2025
Where it sits
- Narrower terms (1)
Other names
2 names
Resolves to: mitochondrial complex III deficiency nuclear type 1
- Also called
- BCS1L mitochondrial complex III deficiencymitochondrial complex III deficiency caused by mutation in BCS1L