raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:147

Carbamoyl-phosphate synthetase 1 deficiency

Synonyms: CPS1 deficiency · CPS1D · Carbamoyl-phosphate synthetase I deficiency · Carbamoyl-phosphate synthetase deficiency

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

A rare, severe disorder of urea cycle metabolism typically characterized by either a neonatal-onset of severe hyperammonemia that occurs few days after birth and manifests with lethargy, vomiting, hypothermia, seizures, coma and death or a presentation outside the newborn period at any age with (sometimes) milder symptoms of hyperammonemia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCarbamoyl-phosphate synthetase 1 deficiencyCPS1 deficiency · CPS1D · Carbamoyl-phosphate synthetase I deficiency · Carbamoyl-phosphate synthetase deficiency
frDéficit en carbamoyl-phosphate synthétase 1CPS1D · Déficit en CPS1 · Déficit en carbamoyl-phosphate synthétase · Déficit en carbamoyl-phosphate synthétase I
deCarbamoyl-Phosphat-Synthetase 1-MangelCPS1-Mangel · CPS1D
esDeficiencia de carbamoil-fosfato sintetasa 1CPS1D · Deficiencia de CPS1 · Deficiencia de carbamoil-fosfato sintetasa · Deficiencia de carbamoil-fosfato sintetasa I
itDeficit di carbamil-fosfato sintetasi 1CPS1D · Deficit di CPS1 · Deficit di carbamil-fosfato sintetasi I · Deficit di carbamoil-fosfato sintasi 1 · Deficit di carbamoil-fosfato sintetasi · Deficit di carbamoil-fosfato sintetasi 1
nlDeficiëntie van carbamoylfosfaatsynthetase 1CPS-deficiëntie · CPS1-deficiëntie · CPS1D · Deficiëntie van carbamoylfosfaatsynthase · Deficiëntie van carbamoylfosfaatsynthetase · Deficiëntie van carbamoylfosfaatsynthetase I · Hyperammoniëmie door CPS-deficiëntie
ptDeficiência de carbamoil-fosfato sintetase 1CPS1D · Deficiência de CPS1 · Deficiência de carbamoil-fosfato sintetase · Deficiência de carbamoil-fosfato sintetase I
plNiedobór syntetazy karbamoilofosforanowej ICPS1D · Niedobór CPS1 · Niedobór syntetazy karbamoilofosforanowej · Niedobór syntetazy karbamoilofosforanowej 1
csDeficit karbamoylfosfátsyntetázy 1Deficit CPS1 · CPS1D · Deficit karbamoylfosfátsyntetázy I · Deficit karbamoylfosfátsyntetázy
ukДефіцит карбамоїл-фосфатсинтетази 1Дефіцит карбамоїл-фосфатсинтетази · Дефіцит карбамоїл-фосфатсинтетази I · Дефіцит CPS1 · CPS1D
zh氨甲酰磷酸合成酶Ⅰ缺乏氨甲酰磷酸合成酶缺乏
trKarbamoil-fosfat sentetaz 1 eksikliğiCPS1D · CPS1 eksikliği · Karbamoil-fosfat sentetaz eksikliği · Karbamoil-fosfat sentetaz I eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM237300Evalidated
ICD-10E72.2NTBTattributedvalidated
ICD-115C50.A1Especificvalidated
MONDO0009376Evalidated
MeSHD020165Evalidated
UMLSC0751753Evalidated
GARD7269Evalidated
MedDRA10058297Evalidated

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
CPS1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:2323ENSG000000218266083072q34carbamoyl-phosphate synthase 120800523[PMID]
5

Prevalence and incidence

5 records
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidated[EXPERT]
Prevalence at birth1-9 / 1 000 0000.19 / 100 000FinlandValue and classValidated18616627[PMID]
Prevalence at birth1-9 / 1 000 000—WorldwideClass onlyValidated20142522[PMID]_[EXPERT]
Prevalence at birth<1 / 1 000 0000.077 / 100 000United StatesValue and classValidated23972786[PMID]
Prevalence at birth1-9 / 1 000 0000.125 / 100 000JapanValue and classValidated2063931[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

7 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003355Aminoaciduria
HP:0001951Episodic ammonia intoxication
HP:0001987Hyperammonemia
HP:0005961Hypoargininemia
HP:0001252Hypotonia
HP:0002093Respiratory insufficiency
HP:0001250Seizure

Run the differential on the 7 obligate / very frequent terms

7

Sources for this card