Is NPHP4 p.Arg933Gln (c.2798G>A) pathogenic?

NPHP4 p.Arg933Gln (c.2798G>A) is classified Uncertain significance in NPHP4 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-05-21). AlphaMissense: likely benign (0.0761); Ultra-rare (popmax 0.0526%, amr); Associated with nephronophthisis.

What condition is associated with NPHP4 p.Arg933Gln (c.2798G>A)?

NPHP4 p.Arg933Gln (c.2798G>A) is associated with nephronophthisis, nephronophthisis 4, Senior-Loken syndrome 4 (ClinVar).

How common is NPHP4 p.Arg933Gln (c.2798G>A) in the general population?

NPHP4 p.Arg933Gln (c.2798G>A) is ultra-rare (popmax 0.0526%, amr) (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 NPHP4 p.Arg933Gln (c.2798G>A)?

AlphaMissense predicts likely benign (score 0.0761) — an in-silico prediction, not a clinical call.

NPHP4 p.Arg933Gln

c.2798G>A · rs768347263 · VCV876921

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

likely benign

0.0761 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0526%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

nephronophthisis

Computational evidence

Protein change
AlphaMissense	0.0761	likely benign
REVEL	0.152	moderately benign-leaning
SaProt	LLR -6.86	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -0.24	GERP -3
Regional constraint	o/e 1.02	unconstrained · MANE · 123 kb · p 0.49 · regional, not allelic
Overall
CADD	7.044	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 0.0526% Admixed American · 31/58,886 alleles

Filtering AF 0.0381% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0331%

Overall 0.00746% 118/1,581,570 alleles · ultra-rare exomes 111/1,429,226 · genomes 7/152,344 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0526%	1,900
Remaining individualsnot grpmax-eligible	0.0164%	6,089
European (non-Finnish)	0.00666%	15,014

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: NPHP4
Protein: p.Arg933Gln
Coding: c.2798G>A
MANE Select: NM_015102
dbSNP: rs768347263
Type: single nucleotide variant
Location: chr1:5877112 (GRCh38)
Gene constraint: LOEUF 1.183 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.44
Residue 933: the 'sufficient for basal bodies localization' region; the 'disordered' region

Full NPHP4 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 4 Senior-Loken syndrome 4

For Nephronophthisis (Orphanet):

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

Similar variants

NPHP4 p.Arg933Trp Uncertain significance ★★ ⚠ same residue
NPHP4 p.Arg933Pro Uncertain significance ★ ⚠ same residue
NPHP4 c.2304+1G>A Pathogenic ★★ same condition
NPHP4 c.2611+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.2611+1G>C Pathogenic ★★ same condition
NPHP4 c.3644+1G>A Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.3644+1G>T Pathogenic/Likely pathogenic ★★ same condition
NPHP4 c.517+1G>A 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/nphp4-p-arg933gln (accessed [today's date]).

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