raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3222

Phosphoribosylpyrophosphate synthetase superactivity

Synonyms: PRPP synthetase superactivity · PRPS1 superactivity

Type
Disease
Group
Disorder
Inheritance
X-linked recessive
Age of onset
Adolescent, Adult, Childhood, Infancy, Neonatal
Status
active

A rare X-linked disorder of purine metabolism associated with hyperuricemia and hyperuricosuria, and comprised of two forms: an early-onset severe form characterized by gout, urolithiasis, and neurodevelopmental anomalies and a mild late-onset form with no neurologic involvement.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPhosphoribosylpyrophosphate synthetase superactivityPRPP synthetase superactivity · PRPS1 superactivity
frHyperactivité de la phosphoribosylpyrophosphate synthétaseActivité accrue de la PRPP synthétase · Activité accrue de la phosphoribosylpyrophosphatase synthétase · Hyperactivité de la PRPP synthétase
dePhosphoribosylpyrophosphat-Synthetase-ÜberaktivitätPRPP-Synthetase-Überaktivität · PRPS1-Überaktivität
esHiperactividad de la fosforribosilpirofosfato-sintetasaHiperactividad de la PRPP sintetasa · Hiperactividad de la PRPS1
itIperattività della fosforibosilpirofosfato sintetasiIperattività di PRPP sintetasi · Iperattività di PRPS1
nlFosforibosylpyrofosfaat-synthetase-superactiviteitPRPP-synthetase-superactiviteit · PRPS1-superactiviteit
ptHiperatividade da fosforribosilpirofosfato sintetaseHiperatividade de PRPP · Hiperatividade de PRPS1
plNadczynność syntetazy fosforybozylo-pirofosforanowejNadczynność syntetazy PRPP · PRPS1 superactivity
csSuperaktivita fosforibosylpyrofosfátsyntetázySuperaktivita PRPP syntetázy · PRPS1 superaktivita
ukСуперактивність фосфорибозилпірофосфатсинтетазиСуперактивність PRPP-синтетази · Суперактивність PRPS1
zh磷酸核糖焦磷酸合成酶超活性PRPP合成酶超活性
trFosforibosilpirofosfat sentetaz süperaktivitesiPRPS1 süperaktivitesi · PRPP sentetaz süperaktivitesi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300661NTBTvalidated
ICD-10E79.8NTBTattributedvalidated
ICD-115C55.0YNTBTindexvalidated
MONDO0010395Evalidated
MeSHC567064Evalidated
UMLSC1970827Evalidated
GARD4337Evalidated

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):

Children (2):

4

Genes

0 direct · 2 via subtypes

Orphanet records no gene directly on this code.

Recorded by Orphanet on subtypes of this disorder:

GeneSubtypeAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PRPS1ORPHA:411543Severe phosphoribosylpyrophosphate synthetase superactivityDisease-causing germline mutation(s) (gain of function) inAssessedHGNC:9462ENSG00000147224311850Xq22.3phosphoribosyl pyrophosphate synthetase 120301734[PMID]
PRPS1ORPHA:411536Mild phosphoribosylpyrophosphate synthetase superactivityDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:9462ENSG00000147224311850Xq22.3phosphoribosyl pyrophosphate synthetase 120301734PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families30 familiesWorldwideFamily(ies)Validated23190330[PMID]
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 2017-10-12
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001251Ataxia
HP:0002149Hyperuricemia
HP:0000407Sensorineural hearing impairment
Frequent (79-30%)
HP:0001679Abnormal aortic morphology
HP:0002167Abnormality of speech or vocalization
HP:0001252Hypotonia
HP:0001249Intellectual disability
HP:0000083Renal insufficiency
Occasional (29-5%)
HP:0000496Abnormality of eye movement
HP:0011675Arrhythmia
HP:0001638Cardiomyopathy
HP:0000822Hypertension
HP:0000486Strabismus

Run the differential on the 3 obligate / very frequent terms

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Sources for this card