Is NPHP3 p.Asp483Asn (c.1447G>A) pathogenic?

NPHP3 p.Asp483Asn (c.1447G>A) is classified Uncertain significance in NPHP3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-17). AlphaMissense: ambiguous (0.4082); Very rare (popmax 0.00267%, afr); Associated with NPHP3-related Meckel-like syndrome.

What condition is associated with NPHP3 p.Asp483Asn (c.1447G>A)?

NPHP3 p.Asp483Asn (c.1447G>A) is associated with NPHP3-related Meckel-like syndrome, renal-hepatic-pancreatic dysplasia 1, nephronophthisis 3 (ClinVar).

How common is NPHP3 p.Asp483Asn (c.1447G>A) in the general population?

NPHP3 p.Asp483Asn (c.1447G>A) is very rare (popmax 0.00267%, afr) (gnomAD).

What do computational predictors say about NPHP3 p.Asp483Asn (c.1447G>A)?

AlphaMissense predicts ambiguous (score 0.4082) — an in-silico prediction, not a clinical call.

NPHP3 p.Asp483Asn

c.1447G>A · VCV3588557

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4082 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Conditions

NPHP3-related Meckel-like syndrome

Computational evidence

Protein change
AlphaMissense	0.4082	ambiguous
REVEL	0.58	indeterminate
SaProt	LLR -7.61	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 2, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 30 kb · p 0.87 · regional, not allelic
Overall
CADD	27.0	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 0.00267% African / African-American · 2/74,912 alleles

Filtering AF 0.000443% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000124% 2/1,613,988 alleles · very rare exomes 1/1,461,834 · genomes 1/152,154 · 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.Asp483Asn
Coding: c.1447G>A
MANE Select: NM_153240
Type: single nucleotide variant
Location: chr3:132704275 (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

Also linked: renal-hepatic-pancreatic dysplasia 1 nephronophthisis 3

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.520-1G>T Pathogenic ★★ same condition
NPHP3 c.823+1G>T 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

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-asp483asn (accessed [today's date]).

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