Is NPHP1 p.Gly269Arg (c.805G>A) pathogenic?

NPHP1 p.Gly269Arg (c.805G>A) is classified Uncertain significance in NPHP1 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-01-21). AlphaMissense: likely pathogenic (0.7698); Ultra-rare (popmax 0.012%, afr); Associated with nephronophthisis.

What condition is associated with NPHP1 p.Gly269Arg (c.805G>A)?

NPHP1 p.Gly269Arg (c.805G>A) is associated with nephronophthisis, nephronophthisis 1, Senior-Loken syndrome 1 (ClinVar).

How common is NPHP1 p.Gly269Arg (c.805G>A) in the general population?

NPHP1 p.Gly269Arg (c.805G>A) is ultra-rare (popmax 0.012%, afr) (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 NPHP1 p.Gly269Arg (c.805G>A)?

AlphaMissense predicts likely pathogenic (score 0.7698) — an in-silico prediction, not a clinical call.

NPHP1 p.Gly269Arg

c.805G>A · rs768608137 · VCV500559

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

likely pathogenic

0.7698 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.012%, afr)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

nephronophthisis

Computational evidence

Protein change
AlphaMissense	0.7698	likely pathogenic · top 9% in NPHP1
REVEL	0.769	pathogenic-leaning
SaProt	LLR -6.97	tolerated
⇒ AlphaMissense and REVEL call this damaging; SaProt does not.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.28 · evaluated, not missing
Pangolin	Δ0.22	loss · gain 0.00 · SpliceAI below 0.2 · independent
Constraint at this position
Conservation	phyloP 7.5	GERP 1.7, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 81 kb · p 0.26 · regional, not allelic
Overall
CADD	25.8	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM G324R vs ClinVar G269R) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.012% African / African-American · 9/74,884 alleles

Filtering AF 0.00624% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00468%

Overall 0.000558% 9/1,613,370 alleles · ultra-rare exomes 0/1,461,280 · genomes 9/152,090 · 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: NPHP1
Protein: p.Gly269Arg
Coding: c.805G>A
MANE Select: NM_001128178
dbSNP: rs768608137
Type: single nucleotide variant
Location: chr2:110163102 (GRCh38)
Gene constraint: LOEUF 0.92 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 76.22 · 2 PDB

Full NPHP1 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

Also linked: nephronophthisis 1 Senior-Loken syndrome 1 Joubert syndrome with renal defect

For Nephronophthisis (Orphanet):

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

Similar variants

NPHP1 c.1083+1G>A Likely pathogenic ★★ same condition
NPHP1 c.1270-1G>A Pathogenic ★★ same condition
NPHP1 c.1270-2A>G Pathogenic/Likely pathogenic ★★ same condition
NPHP1 c.143+1G>C Likely pathogenic ★★ same condition
NPHP1 c.144-1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP1 c.1716+1G>T Pathogenic/Likely pathogenic ★★ same condition
NPHP1 c.329+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP1 c.522+1G>A 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/nphp1-p-gly269arg (accessed [today's date]).

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