Is NPHP1 p.Ile632Val (c.1894A>G) pathogenic?

NPHP1 p.Ile632Val (c.1894A>G) is classified Uncertain significance in NPHP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-11-27). AlphaMissense: likely benign (0.2041); Very rare (popmax 0.00267%, afr); Associated with Inborn genetic diseases.

What condition is associated with NPHP1 p.Ile632Val (c.1894A>G)?

NPHP1 p.Ile632Val (c.1894A>G) is associated with Inborn genetic diseases (ClinVar).

How common is NPHP1 p.Ile632Val (c.1894A>G) in the general population?

NPHP1 p.Ile632Val (c.1894A>G) is very rare (popmax 0.00267%, afr) (gnomAD).

What do computational predictors say about NPHP1 p.Ile632Val (c.1894A>G)?

AlphaMissense predicts likely benign (score 0.2041) — an in-silico prediction, not a clinical call.

NPHP1 p.Ile632Val

c.1894A>G · VCV3407370

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2041 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.2041	likely benign
REVEL	0.294	indeterminate
SaProt	LLR -6.30	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.3	GERP 1.9, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 81 kb · p 0.26 · regional, not allelic
Overall
CADD	23.7	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM I687V vs ClinVar I632V) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,920 alleles

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

Overall 0.000186% 3/1,614,026 alleles · very rare exomes 1/1,461,862 · genomes 2/152,164 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,460
European (non-Finnish)	8.47e-05%	1,180,013

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.Ile632Val
Coding: c.1894A>G
MANE Select: NM_001128178
Type: single nucleotide variant
Location: chr2:110123931 (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

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

NPHP1 p.Ile632Thr Uncertain significance ★★ ⚠ same residue
NPHP1 p.Gly287Arg Pathogenic ★★ same condition
NPHP1 c.771+136C>A Uncertain significance ★★ ⚠ same condition
NPHP1 c.771+26A>G Uncertain significance ★★ ⚠ same condition
NPHP1 c.771+38G>T Uncertain significance ★★ ⚠ same condition
NPHP1 p.Arg389His Uncertain significance ★★ ⚠ same condition
NPHP1 p.Arg628Gln Uncertain significance ★★ ⚠ same condition
NPHP1 p.Asn59His Uncertain significance ★★ ⚠ 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-ile632val (accessed [today's date]).

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