PRH2

Chr 12

proline rich protein HaeIII subfamily 2

Also known as: PRP-1/PRP-2, Pr, pr1/Pr2

NCBI Gene: 5555ENSG00000134551UniProt: P02810

This gene encodes proline-rich protein 2, a salivary glycoprotein that acts as a potent inhibitor of calcium phosphate crystal growth, providing protective and reparative functions for dental enamel integrity. The gene shows low constraint to loss-of-function variants (pLI 0.01, LOEUF 1.68), and certain alleles are associated with increased susceptibility to dental caries with presumed autosomal recessive inheritance. This gene primarily affects dental health rather than neurological function.

Summary from RefSeq, UniProt
Research Assistant →
0
Active trials
0
Pubs (1 yr)
40
P/LP submissions
0%
P/LP missense
1.68
LOEUF
Multiple*
Mechanism· predicted
Clinical Summary— PRH2
⚡
Population Constraint (gnomAD)
Low constraint (pLI 0.01) — loss-of-function variants are relatively tolerated in the population.
📋
ClinVar Variants
40 unique Pathogenic / Likely Pathogenic· 31 VUS of 73 total submissions
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Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

gnomAD
Tolerant — LoF & missense variants common in population
LoF Constraint
1.68LOEUF
pLI 0.012
Z-score 0.52
OE 0.72 (0.33–1.68)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint
0.64Z-score
OE missense 0.81 (0.67–0.98)
72 obs / 89.0 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.72 (0.33–1.68)
0≤0.351.4
Missense OE0.81 (0.67–0.98)
0≤0.61.4
Synonymous OE0.89
0≤1.21.6
LoF obs/exp: 3 / 4.1Missense obs/exp: 72 / 89.0Syn Z: 0.49
DN
0.83top 10%
GOF
0.6736th %ile
LOF
0.1895th %ile

This gene has evidence for multiple mechanisms of pathogenicity (dominant-negative and gain-of-function). Both the Badonyi & Marsh prediction and the broader genomic evidence point to dominant-negative as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.

DNprediction above median
GOFprediction above median

Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.

ClinVar Variant Classifications

73 submitted variants in ClinVar

ClinVar

Classification Summary

Pathogenic38
Likely Pathogenic2
VUS31
Likely Benign1
38
Pathogenic
2
Likely Pathogenic
31
VUS
1
Likely Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
38
0
38
Likely Pathogenic
0
0
2
0
2
VUS
0
18
13
0
31
Likely Benign
0
0
1
0
1
Benign
0
0
0
0
0
Total01854072

LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly

View in ClinVar →

Protein Context — Lollipop Plot

PRH2 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

ClinicalTrials.gov

No active trials found for this gene.

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Clinical Literature
Open Research Assistant →
Full-Text Mentions
NLP-detected gene mentions in article bodies · via PubTator3
PubTator3
Top 5 full-text resultsSearch PubTator3 ↗
Key Publications
Landmark & review papers · by relevance
PubMed
Top 3 results · since 2015Search PubMed ↗
Recent Gene-Specific Literature
Gene in title · MEDLINE · newest first
Europe PMC
Top 5 resultsSearch Europe PMC ↗

External Resources

Links to major genomics databases and tools

Franklin by Genoox
AI-powered variant curation and clinical analysis
DECIPHER
Genomic variants and phenotypes in rare disease patients