Is NPHP3 p.Leu1141Pro (c.3422T>C) pathogenic?

NPHP3 p.Leu1141Pro (c.3422T>C) is classified Conflicting classifications of pathogenicity in NPHP3 (ClinVar, Conflicting submitters, 3 submitters; last evaluated 2023-03-23). AlphaMissense: likely pathogenic (0.9937); Very rare (popmax 0.000424%, nfe); Associated with Fibrotic kidney disease.

What condition is associated with NPHP3 p.Leu1141Pro (c.3422T>C)?

NPHP3 p.Leu1141Pro (c.3422T>C) is associated with Fibrotic kidney disease, nephronophthisis (ClinVar).

How common is NPHP3 p.Leu1141Pro (c.3422T>C) in the general population?

NPHP3 p.Leu1141Pro (c.3422T>C) is very rare (popmax 0.000424%, nfe) (gnomAD).

What do computational predictors say about NPHP3 p.Leu1141Pro (c.3422T>C)?

AlphaMissense predicts likely pathogenic (score 0.9937) — an in-silico prediction, not a clinical call.

NPHP3 p.Leu1141Pro

c.3422T>C · rs1057521090 · VCV381594

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 3 submitters

AlphaMissense

likely pathogenic

0.9937 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000424%, nfe)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Fibrotic kidney disease

Computational evidence

Protein change
AlphaMissense	0.9937	likely pathogenic · top 1% in NPHP3
REVEL	0.969	strongly pathogenic-leaning
SaProt	LLR -15.23	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 11	GERP 1.7, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 11 kb · p 0.0019 · regional, not allelic
Overall
CADD	29.6	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000424% European (non-Finnish) · 5/1,179,982 alleles

Filtering AF 0.000124% ClinGen BA1/BS1 input FAF95, joint · FAF99 9e-05%

Overall 0.00031% 5/1,613,984 alleles · very rare exomes 4/1,461,790 · genomes 1/152,194 · 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.Leu1141Pro
Coding: c.3422T>C
MANE Select: NM_153240
dbSNP: rs1057521090
Type: single nucleotide variant
Location: chr3:132684702 (GRCh38)
Gene constraint: LOEUF 0.873 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 73.59 · 1 PDB
Residue 1141: a UniProt-annotated variant site (in nphp3)

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

Disease context

Fibrotic kidney disease

Also linked: nephronophthisis

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-leu1141pro (accessed [today's date]).

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