Is NPHP3 p.Tyr321His (c.961T>C) pathogenic?

NPHP3 p.Tyr321His (c.961T>C) is classified Uncertain significance in NPHP3 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-07-15). AlphaMissense: likely benign (0.1675); Very rare (popmax 8.57e-05%, nfe); Associated with nephronophthisis.

What condition is associated with NPHP3 p.Tyr321His (c.961T>C)?

NPHP3 p.Tyr321His (c.961T>C) is associated with nephronophthisis (ClinVar).

How common is NPHP3 p.Tyr321His (c.961T>C) in the general population?

NPHP3 p.Tyr321His (c.961T>C) is very rare (popmax 8.57e-05%, nfe) (gnomAD).

How is Nephronophthisis inherited?

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

What do computational predictors say about NPHP3 p.Tyr321His (c.961T>C)?

AlphaMissense predicts likely benign (score 0.1675) — an in-silico prediction, not a clinical call.

NPHP3 p.Tyr321His

c.961T>C · rs752801926 · VCV1714364

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1675 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.57e-05%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

nephronophthisis

Computational evidence

Protein change
AlphaMissense	0.1675	likely benign
REVEL	0.223	benign-leaning
SaProt	LLR -8.74	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.1	GERP 2, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 30 kb · p 0.87 · regional, not allelic
Overall
CADD	18.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.57e-05% European (non-Finnish) · 1/1,167,326 alleles

Overall 6.28e-05% 1/1,591,554 alleles · very rare exomes 1/1,439,182 · genomes 0/152,372 · joint denominator

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.Tyr321His
Coding: c.961T>C
MANE Select: NM_153240
dbSNP: rs752801926
Type: single nucleotide variant
Location: chr3:132713283 (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-tyr321his (accessed [today's date]).

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