Is RPGRIP1 p.Ala331= (c.993A>G) pathogenic?

RPGRIP1 p.Ala331= (c.993A>G) is classified Likely benign in RPGRIP1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-05). Ultra-rare (popmax 0.0227%, afr); Associated with Leber congenital amaurosis 6.

What condition is associated with RPGRIP1 p.Ala331= (c.993A>G)?

RPGRIP1 p.Ala331= (c.993A>G) is associated with Leber congenital amaurosis 6, cone-rod dystrophy 13 (ClinVar).

How common is RPGRIP1 p.Ala331= (c.993A>G) in the general population?

RPGRIP1 p.Ala331= (c.993A>G) is ultra-rare (popmax 0.0227%, afr) (gnomAD).

How is Leber congenital amaurosis inherited?

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

RPGRIP1 p.Ala331=

c.993A>G · rs773504349 · VCV1570185

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0227%, afr)

Conditions

Leber congenital amaurosis 6

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.5	GERP -0.54, phastCons 0.68
Overall
CADD	9.964	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0227% African / African-American · 17/74,906 alleles

Filtering AF 0.0144% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0119%

Overall 0.00124% 20/1,612,308 alleles · ultra-rare exomes 14/1,460,106 · genomes 6/152,202 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0227%	4,406
Remaining individualsnot grpmax-eligible	0.0032%	31,210
Admixed American	0.00167%	59,742

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: RPGRIP1
Protein: p.Ala331=
Coding: c.993A>G
MANE Select: NM_020366
dbSNP: rs773504349
Type: single nucleotide variant
Location: chr14:21311886 (GRCh38)
Gene constraint: LOEUF 0.918 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 67.60 · 1 PDB

Full RPGRIP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Leber congenital amaurosis 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: cone-rod dystrophy 13

For Leber congenital amaurosis (Orphanet):

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

Similar variants

RPGRIP1 c.1467+1G>A Pathogenic/Likely pathogenic ★★ same condition
RPGRIP1 c.1468-2A>G Pathogenic/Likely pathogenic ★★ same condition
RPGRIP1 c.218+1G>T Likely pathogenic ★★ same condition
RPGRIP1 c.2367+1G>A Pathogenic ★★ same condition
RPGRIP1 c.2368-2A>G Pathogenic/Likely pathogenic ★★ same condition
RPGRIP1 c.2711-2A>G Pathogenic ★★ same condition
RPGRIP1 c.2895+1G>T Pathogenic ★★ same condition
RPGRIP1 c.3617+1G>A 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/rpgrip1-p-ala331 (accessed [today's date]).

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