raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:319509

Combined oxidative phosphorylation defect type 9

Synonyms: COXPD9

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

Combined oxidative phosphorylation defect type 9 is a rare mitochondrial disease due to a defect in mitochondrial protein synthesis characterized by initially normal growth and development followed by the infantile-onset of failure to thrive, psychomotor delay, poor feeding, dyspnea, severe hypertrophic cardiomyopathy and hepatomegaly. Laboratory studies report increased plasma lactate and alanine, abnormal liver enzymes and decreased activity of mitochondrial respiratory chain complexes I, III, IV, and V.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCombined oxidative phosphorylation defect type 9COXPD9
frDéficit combiné de la phosphorylation oxydative type 9= en
deKombinierter Defekt der oxidativen Phosphorylierung Typ 9= en
esDeficiencia combinada de la fosforilación oxidativa tipo 9= en
itDifetto combinato della fosforilazione ossidativa, tipo 9= en
nlGecombineerde oxidatieve fosforylatiedeficiëntie type 9COXPD9 · Gecombineerd defect in oxidatieve fosforylering type 9
ptDefeito combinado da fosforilação oxidativa, tipo 9
plZłożony defekt fosforylacji oksydacyjnej typu 9= en
csKombinovaná porucha oxidativní fosforylace, typ 9= en
ukКомбінований дефект окисного фосфорилювання, тип 9= en
zh复合氧化磷酸化缺陷9型= en
trKombine oksidatif fosforilasyon defekti tip 9= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM614582Evalidated
ICD-10E88.8NTBTattributedvalidated
ICD-115C53.23NTBTattributedvalidated
MONDO0013811Evalidated
UMLSC4706315Evalidated

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 (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MRPL3Disease-causing germline mutation(s) inAssessedHGNC:10379ENSG000001146866071183q22.1mitochondrial ribosomal protein L321786366[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families4 casesWorldwideCase(s)Validated21786366[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_21786366[PMID]

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card