Is RD3 p.Pro109= (c.327C>G) pathogenic?

RD3 p.Pro109= (c.327C>G) is classified Likely benign in RD3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-07-19). Very rare (popmax 0.00936%, afr); Associated with Leber congenital amaurosis 12.

What condition is associated with RD3 p.Pro109= (c.327C>G)?

RD3 p.Pro109= (c.327C>G) is associated with Leber congenital amaurosis 12 (ClinVar).

How common is RD3 p.Pro109= (c.327C>G) in the general population?

RD3 p.Pro109= (c.327C>G) is very rare (popmax 0.00936%, afr) (gnomAD).

How is Leber congenital amaurosis inherited?

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

RD3 p.Pro109=

c.327C>G · rs774437667 · VCV1080914

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00936%, afr)

Conditions

Leber congenital amaurosis 12

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -3.9	GERP -2.2
Overall
CADD	3.031	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00936% African / African-American · 7/74,816 alleles

Filtering AF 0.00438% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00309%

Overall 0.00081% 13/1,604,138 alleles · very rare exomes 6/1,452,000 · genomes 7/152,138 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00936%	10,688
Admixed American	0.00338%	29,588
Remaining individualsnot grpmax-eligible	0.00322%	31,011
European (non-Finnish)	0.00017%	587,782

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: RD3
Protein: p.Pro109=
Coding: c.327C>G
MANE Select: NM_001164688
dbSNP: rs774437667
Type: single nucleotide variant
Location: chr1:211479297 (GRCh38)
Gene constraint: LOEUF 1.116 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 80.99 · 1 PDB

Full RD3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Leber congenital amaurosis 12 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Leber congenital amaurosis (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

RD3 p.Pro109Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
RD3 c.296+1G>T Pathogenic/Likely pathogenic ★★ same condition
RD3 p.Arg38Ter Pathogenic ★★ same condition
RD3 p.Tyr60Ter Pathogenic ★★ same condition
RD3 c.-572G>A Uncertain significance ★★ same condition
RD3 c.*1277G>A Uncertain significance ★★ same condition
RD3 p.Ala135Val Uncertain significance ★★ ⚠ same condition
RD3 p.Arg15Trp 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/rd3-p-pro109 (accessed [today's date]).

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