raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:411536

Mild phosphoribosylpyrophosphate synthetase superactivity

Synonyms: Mild PRPP synthetase superactivity · Mild PRPS1 superactivity

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
X-linked recessive
Age of onset
Adolescent, Adult
Status
active

A mild form of phosphoribosylpyrophosphate (PRPP) synthetase superactivity, an X-linked disorder of purine metabolism, characterized by adolescent or early adult-onset hyperuricemia and hyperuricosuria, leading to urolithiasis and gout.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMild phosphoribosylpyrophosphate synthetase superactivityMild PRPP synthetase superactivity · Mild PRPS1 superactivity
frHyperactivité de la phosphoribosylpyrophosphate synthétase modéréeHyperactivité de la PRPP synthétase modérée · Hyperactivité de la PRPS1 modérée
dePhosphoribosylpyrophosphat-Synthetase-Überaktivität, milde
esHiperactividad leve de la fosforibosilpirofosfato sintetasaHiperactividad leve de la PRPP sintetasa · Hiperactividad leve de la PRPS1
itLieve iperattività della fosforibosilpirofosfato sintetasiLieve iperattività della PRPP sintetasi · Lieve iperattività di PRPS1
nlMilde fosforibosylpyrofosfaat-synthetase-superactiviteitMilde PRPP-synthetase-superactiviteit · Milde PRPS1-superactiviteit
ptHiperatividade ligeira da fosforribosilpirofosfatase sintetaseHiperatividade ligeira da PRPS1 · Hiperatividade ligeira da PRPP sintetase
plŁagodna nadczynność syntetazy fosforybozylopirofosforanuŁagodna nadczynność PRPS1 · Łagodna nadczynność syntetazy PRPP
csMírně zvýšená aktivita fosforibosylpyrofosfátsyntetázyMírná superaktivita PRPP syntetázy · Mírná superaktivita PRPS1
ukПомірна суперактивність фосфорибозилпірофосфатсинтетазиПомірна суперактивність PRPP-синтетази · Помірна суперактивність PRPS1
zh轻度磷酸核糖焦磷酸合成酶超活性轻度PRPP合成酶超活性
trHafif fosforibosilpirofosfat sentetaz süperaktivitesiHafif PRPS1 süperaktivitesi · Hafif PRPP sentetaz süperaktivitesi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300661NTBTvalidated
ICD-10E79.8NTBTattributedvalidated
ICD-115C55.0YNTBTattributedvalidated
MONDO0018463Evalidated
UMLSC5680016Evalidated

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
PRPS1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:9462ENSG00000147224311850Xq22.3phosphoribosyl pyrophosphate synthetase 120301734PMID]
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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyNot yet validatedORPHANET

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

15 annotations · validated 2020-10-20
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002149Hyperuricemia
HP:0003149Hyperuricosuria
HP:0003240Increased phosphoribosylpyrophosphate synthetase activity
Frequent (79-30%)
HP:0001369Arthritis
HP:0020074Crystalluria
HP:0000791Uric acid nephrolithiasis
Occasional (29-5%)
HP:0001919Acute kidney injury
HP:0000083Renal insufficiency
HP:0012626Stage 4 chronic kidney disease
Very rare (<4-1%)
HP:0000707Abnormality of the nervous system
Excluded (0%)
HP:0001999Abnormal facial shape
HP:0000478Abnormality of the eye
HP:0001249Intellectual disability
HP:0009830Peripheral neuropathy
HP:0000407Sensorineural hearing impairment

Run the differential on the 3 obligate / very frequent terms

Annotation source: 30423175[PMID]_20301734[PMID]_26089585[PMID]

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Sources for this card