raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:411543

Severe phosphoribosylpyrophosphate synthetase superactivity

Synonyms: Severe PRPP synthetase superactivity · Severe PRPS1 superactivity

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
X-linked recessive
Age of onset
Childhood, Infancy, Neonatal
Status
active

A severe form of phosphoribosylpyrophosphate (PRPP) synthetase superactivity, an X-linked disorder of purine metabolism, characterized by early onset hyperuricemia and hyperuricosuria, and clinically manifesting with urolithiasis, gout and neurodevelopmental anomalies consisting of variable combinations of sensorineural hearing loss, hypotonia, and ataxia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSevere phosphoribosylpyrophosphate synthetase superactivitySevere PRPP synthetase superactivity · Severe PRPS1 superactivity
frHyperactivité de la phosphoribosylpyrophosphate synthétase sévèreHyperactivité de la PRPP synthétase sévère · Hyperactivité de la PRPS1 sévère
dePhosphoribosylpyrophosphat-Synthetase-Überaktivität, schwere
esHiperactividad grave de la fosforribosilpirofosfato-sintetasaHiperactividad grave de la PRPP sintetasa · Hiperactividad grave de la PRPS1
itGrave iperattività della fosforibosilpirofosfato sintetasiGrave iperattività della PRPP sintetasi · Grave iperattività di PRPS1
nlErnstige fosforibosylpyrofosfaat-synthetase-superactiviteitErnstige PRPP-synthetase-superactiviteit · Ernstige PRPS1-superactiviteit
ptSuperactividade grave da fosforribosilpirofosfato sintetase
plCiężka nadczynność syntetazy fosforybozylopirofosforanuCiężka nadczynność PRPS1 · Ciężka nadczynność syntetazy PRPP
csVýznamně zvýšená aktivita fosforibosylpyrofosfátsyntetázyTežká superaktivita PRPS1 · Těžká superaktivita PRPP syntetázy · Těžká superaktivita PRPS1
ukВиражена суперактивність фосфорибозилпірофосфатсинтетазиВиражена суперактивність PRPP-синтетази · Сильна суперактивність PRPS1
zh严重磷酸核糖焦磷酸合成酶超活性重度PRPP合成酶超活性
trAğır fosforibosilpirofosfat sentetaz süperaktivitesiAğır PRPS1 süperaktivitesi · Ağır PRPP sentetaz süperaktivitesi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300661NTBTvalidated
ICD-10E79.8NTBTattributedvalidated
ICD-115C55.0YNTBTattributedvalidated
MONDO0018464Evalidated
UMLSC5680017Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PRPS1Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:9462ENSG00000147224311850Xq22.3phosphoribosyl pyrophosphate synthetase 120301734[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated20301734[PMID]_ORPHANET
Cases/families33 casesWorldwideCase(s)Validated20301734[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

21 annotations · validated 2020-10-20
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001997Gout
HP:0002149Hyperuricemia
HP:0003240Increased phosphoribosylpyrophosphate synthetase activity
HP:0012759Neurodevelopmental abnormality
HP:0000791Uric acid nephrolithiasis
Frequent (79-30%)
HP:0000707Abnormality of the nervous system
HP:0001369Arthritis
HP:0020074Crystalluria
HP:0003149Hyperuricosuria
HP:0001252Hypotonia
HP:0001249Intellectual disability
HP:0000083Renal insufficiency
HP:0000407Sensorineural hearing impairment
Occasional (29-5%)
HP:0001919Acute kidney injury
HP:0001251Ataxia
HP:0007178Motor polyneuropathy
HP:0009830Peripheral neuropathy
Very rare (<4-1%)
HP:0000501Glaucoma
HP:0001263Global developmental delay
HP:0000545Myopia
HP:0002205Recurrent respiratory infections

Run the differential on the 5 obligate / very frequent terms

Annotation source: 20301734[PMID]_20005278[PMID]_26089585[PMID]

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Sources for this card