raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:67046

3-methylglutaconic aciduria type 1

Synonyms: 3-methylglutaconyl-CoA hydratase deficiency · 3MG-CoA hydratase deficiency · MGA1

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

3-methylglutaconic aciduria (3-MGA) type I is an inborn error of leucine metabolism with a variable clinical phenotype ranging from mildly delayed speech to psychomotor retardation, coma, failure to thrive, metabolic acidosis and dystonia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en3-methylglutaconic aciduria type 13-methylglutaconyl-CoA hydratase deficiency · 3MG-CoA hydratase deficiency · MGA1
frAcidurie 3-méthylglutaconique type 1AMG type I · Déficit en 3-méthylglutaconyl-CoA hydratase · Déficit en 3MG-CoA hydratase
de3-Methylglutaconazidurie Typ 13-Methylglutaconyl-CoA-Hydratase-Mangel · 3-Methylglutakon-Azidurie · 3MG-CoA-Hydratase-Mangel · MGA Typ I · MGA1
esAciduria 3-metilglutacónica tipo 1Deficiencia de 3-metilglutaconil-CoA hidratasa · Deficiencia de 3MG-CoA hidratasa · MGA1
itAciduria 3-metilglutaconica, tipo 1Deficit di 3-metilglutaconil-CoA idratasi · Deficit di 3MG-CoA idratasi · MGA1
nl3-methylglutaconacidurie type 1Deficiëntie van 3-methylglutaconyl-CoA-hydratase · Deficiëntie van 3MG-CoA-hydratase · MGA1
ptAcidúria 3-metilglutacónica tipo 1Deficiência de 3-@metilglutaconil-coA hidratase · Deficiência de 3MG-coA hidratase · MGA tipo 1
plKwasica 3-metyloglutakonowa typu 1MGA typu 1 · Niedobór hydratazy 3-metyloglutakonylo-CoA · Niedobór hydratazy 3MG-CoA
cs3-methylglutakonová acidurie, typ 1Deficit 3-methylglutakonyl-CoA hydratázy · Deficit 3MG-CoA hydratázy · MGA1
uk3-метилглутаконова ацидурія, тип 1Дефіцит 3-метилглутаконіл-КоА-гідратази · Дефіцит 3МГ-КоА-гідратази · MGA1
zh3-甲基戊二酸尿症1型3-甲基戊烯二酰-CoA水合酶缺乏症
tr3-metilglutakonik asidüri tip 1MGA1 · 3MG-CoA hidrataz eksikliği · 3-metilglutakonil-CoA hidrataz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM250950Evalidated
ICD-10E71.1NTBTattributedvalidated
ICD-115C50.E0NTBTindexvalidated
MONDO0009610Evalidated
MeSHC562801Evalidated
UMLSC0342727Evalidated
GARD10321Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
AUHDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:890ENSG000001480906005299q22.31AU RNA binding methylglutaconyl-CoA hydratase12434311[PMID]_12655555[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

13 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:00035353-Methylglutaconic aciduria
HP:0001508Failure to thrive
Frequent (79-30%)
HP:0000750Delayed speech and language development
HP:0001263Global developmental delay
Occasional (29-5%)
HP:0002134Abnormal basal ganglia morphology
HP:0001259Coma
HP:0001332Dystonia
HP:0002240Hepatomegaly
HP:0001943Hypoglycemia
HP:0000252Microcephaly
HP:0002073Progressive cerebellar ataxia
HP:0001250Seizure
HP:0001285Spastic tetraparesis

Run the differential on the 2 obligate / very frequent terms

Annotation source: 20855850[PMID]

7

Sources for this card