Is NPHP3 p.Asn776Ser (c.2327A>G) pathogenic?

NPHP3 p.Asn776Ser (c.2327A>G) is classified Uncertain significance in NPHP3 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-02-15). AlphaMissense: likely benign (0.0563); Very rare (popmax 0.00333%, amr); Associated with Inborn genetic diseases.

What condition is associated with NPHP3 p.Asn776Ser (c.2327A>G)?

NPHP3 p.Asn776Ser (c.2327A>G) is associated with Inborn genetic diseases (ClinVar).

How common is NPHP3 p.Asn776Ser (c.2327A>G) in the general population?

NPHP3 p.Asn776Ser (c.2327A>G) is very rare (popmax 0.00333%, amr) (gnomAD).

What do computational predictors say about NPHP3 p.Asn776Ser (c.2327A>G)?

AlphaMissense predicts likely benign (score 0.0563) — an in-silico prediction, not a clinical call.

NPHP3 p.Asn776Ser

c.2327A>G · rs1553772603 · VCV497321

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0563 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00333%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0563	likely benign
REVEL	0.221	benign-leaning
SaProt	LLR -2.25	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 0.63	GERP -3.2, phastCons 0.57
Regional constraint	o/e 0.88	unconstrained · MANE · 11 kb · p 0.0019 · regional, not allelic
Overall
CADD	6.403	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 0.00333% Admixed American · 2/60,020 alleles

Filtering AF 0.000553% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000207%

Overall 0.000186% 3/1,613,970 alleles · very rare exomes 3/1,461,692 · genomes 0/152,278 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00333%	30,010
European (non-Finnish)	8.48e-05%	1,179,889

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.Asn776Ser
Coding: c.2327A>G
MANE Select: NM_153240
dbSNP: rs1553772603
Type: single nucleotide variant
Location: chr3:132692802 (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

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

NPHP3 p.Ala1203Val Uncertain significance ★★ ⚠ same condition
NPHP3 p.Arg605Cys Uncertain significance ★★ ⚠ same condition
NPHP3 p.Arg705His Uncertain significance ★★ ⚠ same condition
NPHP3 p.Arg756Trp Uncertain significance ★★ ⚠ same condition
NPHP3 p.Asn1097Ser Uncertain significance ★★ ⚠ same condition
NPHP3 p.Asn218Ser Uncertain significance ★★ ⚠ same condition
NPHP3 p.Gly235Arg Uncertain significance ★★ ⚠ same condition
NPHP3 p.Gly78Val Uncertain significance ★★ ⚠ 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-asn776ser (accessed [today's date]).

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