Is NPHP1 p.Pro616Ala (c.1846C>G) pathogenic?

NPHP1 p.Pro616Ala (c.1846C>G) is classified Uncertain significance in NPHP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-21). AlphaMissense: likely benign (0.0663); Absent from gnomAD v4.1; Associated with nephronophthisis 1.

What condition is associated with NPHP1 p.Pro616Ala (c.1846C>G)?

NPHP1 p.Pro616Ala (c.1846C>G) is associated with nephronophthisis 1, Senior-Loken syndrome 1, Joubert syndrome with renal defect (ClinVar).

How common is NPHP1 p.Pro616Ala (c.1846C>G) in the general population?

NPHP1 p.Pro616Ala (c.1846C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about NPHP1 p.Pro616Ala (c.1846C>G)?

AlphaMissense predicts likely benign (score 0.0663) — an in-silico prediction, not a clinical call.

NPHP1 p.Pro616Ala

c.1846C>G · VCV3584234

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0663 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

nephronophthisis 1

Computational evidence

Protein change
AlphaMissense	0.0663	likely benign
REVEL	0.168	moderately benign-leaning
SaProt	LLR -7.13	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 3.7	GERP 1.9, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 81 kb · p 0.26 · regional, not allelic
Overall
CADD	14.68	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 P671A vs ClinVar P616A) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: NPHP1
Protein: p.Pro616Ala
Coding: c.1846C>G
MANE Select: NM_001128178
Type: single nucleotide variant
Location: chr2:110123979 (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 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

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

Similar variants

NPHP1 p.Pro616= Likely benign ★ same residue
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

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-pro616ala (accessed [today's date]).

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