Is NPHP3 p.Pro31= (c.93G>A) pathogenic?

NPHP3 p.Pro31= (c.93G>A) is classified Likely benign in NPHP3 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-05). Ultra-rare (popmax 0.0183%, mid); Associated with nephronophthisis.

What condition is associated with NPHP3 p.Pro31= (c.93G>A)?

NPHP3 p.Pro31= (c.93G>A) is associated with nephronophthisis (ClinVar).

How common is NPHP3 p.Pro31= (c.93G>A) in the general population?

NPHP3 p.Pro31= (c.93G>A) is ultra-rare (popmax 0.0183%, mid) (gnomAD).

How is Nephronophthisis inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

NPHP3 p.Pro31=

c.93G>A · VCV4740235

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0183%, mid)

Conditions

nephronophthisis

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -2.2	GERP -2.7
Overall
CADD	13.87	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0183% Middle Eastern · 1/5,468 alleles

Filtering AF 0.000184% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000121%

Overall 0.000507% 8/1,576,534 alleles · ultra-rare exomes 7/1,424,534 · genomes 1/152,000 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0183%	5,468
Remaining individualsnot grpmax-eligible	0.00163%	61,332
European (non-Finnish)	0.000513%	195,084

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: NPHP3
Protein: p.Pro31=
Coding: c.93G>A
MANE Select: NM_153240
Type: single nucleotide variant
Location: chr3:132722263 (GRCh38)
Gene constraint: LOEUF 0.873 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.59 · 1 PDB

Full NPHP3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

nephronophthisis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Nephronophthisis (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Antenatal, Childhood, Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Finland)

Similar variants

NPHP3 c.1985+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP3 c.3201+1G>T Likely pathogenic ★★ same condition
NPHP3 c.393+1G>C Likely pathogenic ★★ same condition
NPHP3 c.958-2A>G Pathogenic ★★ same condition
NPHP3 p.Arg1125Ter Pathogenic ★★ same condition
NPHP3 p.Arg1259Ter Pathogenic/Likely pathogenic ★★ same condition
NPHP3 p.Arg142Ter Pathogenic/Likely pathogenic ★★ same condition
NPHP3 p.Arg577Ter Pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/nphp3-p-pro31 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown