Is PRPH2 p.Glu176Val (c.527A>T) pathogenic?

PRPH2 p.Glu176Val (c.527A>T) is classified Uncertain significance in PRPH2 (ClinVar, Single submitter, 2 submitters; last evaluated 2021-07-28). Very rare (popmax 0.000508%, nfe); Associated with PRPH2-related disorder.

What condition is associated with PRPH2 p.Glu176Val (c.527A>T)?

PRPH2 p.Glu176Val (c.527A>T) is associated with PRPH2-related disorder, inherited retinal dystrophy (ClinVar).

How common is PRPH2 p.Glu176Val (c.527A>T) in the general population?

PRPH2 p.Glu176Val (c.527A>T) is very rare (popmax 0.000508%, nfe) (gnomAD).

PRPH2 p.Glu176Val

c.527A>T · rs1761906163 · VCV1370637

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.000508%, nfe)

Conditions

PRPH2-related disorder

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.643	indeterminate
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 6.1	GERP 1.6, phastCons 1
Regional constraint	o/e 0.98	unconstrained · MANE · 24 kb · p 0.64 · regional, not allelic
Overall
CADD	24.5	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000508% European (non-Finnish) · 6/1,180,038 alleles

Filtering AF 0.000183% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00012%

Overall 0.000496% 8/1,614,184 alleles · very rare exomes 8/1,461,890 · genomes 0/152,294 · joint denominator

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0032%	31,256
European (non-Finnish)grpmax	0.000508%	196,673

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: PRPH2
Protein: p.Glu176Val
Coding: c.527A>T
MANE Select: NM_000322
dbSNP: rs1761906163
Type: single nucleotide variant
Location: chr6:42721808 (GRCh38)
Gene constraint: LOEUF 0.773 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 87.56 · 1 PDB

Full PRPH2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Also linked: inherited retinal dystrophy

Similar variants

PRPH2 c.581+1G>A Pathogenic ★★ same condition
PRPH2 c.582-1G>A Pathogenic/Likely pathogenic ★★ same condition
PRPH2 c.582-2A>T Pathogenic ★★ same condition
PRPH2 c.828+1G>A Pathogenic ★★ same condition
PRPH2 c.828+1G>T Pathogenic ★★ same condition
PRPH2 c.828+2T>C Pathogenic/Likely pathogenic ★★ same condition
PRPH2 c.828+3A>T Pathogenic ★★ same condition
PRPH2 p.Arg142Trp 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/prph2-p-glu176val (accessed [today's date]).

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