Is NPHP4 p.His894Arg (c.2681A>G) pathogenic?

NPHP4 p.His894Arg (c.2681A>G) is classified Benign/Likely benign in NPHP4 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-27). AlphaMissense: likely benign (0.084); Low-frequency (popmax 1.27%, afr); Associated with Senior-Loken syndrome 4.

What condition is associated with NPHP4 p.His894Arg (c.2681A>G)?

NPHP4 p.His894Arg (c.2681A>G) is associated with Senior-Loken syndrome 4, nephronophthisis 4, nephronophthisis (ClinVar).

How common is NPHP4 p.His894Arg (c.2681A>G) in the general population?

NPHP4 p.His894Arg (c.2681A>G) is low-frequency (popmax 1.27%, afr) (gnomAD).

How is Senior-Loken syndrome inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about NPHP4 p.His894Arg (c.2681A>G)?

AlphaMissense predicts likely benign (score 0.084) — an in-silico prediction, not a clinical call.

NPHP4 p.His894Arg

c.2681A>G · rs113097479 · VCV462717

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.084 · ACMG-weighted

gnomAD v4.1

Rare

low-frequency (popmax 1.27%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Senior-Loken syndrome 4

Computational evidence

Protein change
AlphaMissense	0.084	likely benign
REVEL	0.219	benign-leaning
SaProt	LLR -5.44	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 -0.19	GERP -3.3
Regional constraint	o/e 1.02	unconstrained · MANE · 123 kb · p 0.49 · regional, not allelic
Overall
CADD	0.141	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 1.27% African / African-American · 956/75,012 alleles

Filtering AF 1.21% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.18%

Overall 0.0656% 1,056/1,608,998 alleles · low-frequency exomes 481/1,456,620 · genomes 575/152,378 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	1.27%	78
Remaining individualsnot grpmax-eligible	0.0932%	1,073
Middle Eastern	0.0663%	1,509
Admixed American	0.052%	1,925
South Asian	0.00443%	22,570
East Asian	0.00224%	44,710
European (non-Finnish)	0.00017%	588,530

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.His894Arg
Coding: c.2681A>G
MANE Select: NM_015102
dbSNP: rs113097479
Type: single nucleotide variant
Location: chr1:5877229 (GRCh38)
Gene constraint: LOEUF 1.183 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.44
Residue 894: the 'sufficient for basal bodies localization' region

Full NPHP4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Senior-Loken syndrome 4 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: nephronophthisis 4 nephronophthisis

For Senior-Loken syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood, Infancy
Prevalence: 1-9 / 1 000 000 (Worldwide)

Similar variants

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
NPHP4 c.518-2A>G Likely pathogenic ★★ same condition
NPHP4 c.992+2T>C 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-his894arg (accessed [today's date]).

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