Is AIPL1 p.Lys68Arg (c.203A>G) pathogenic?

AIPL1 p.Lys68Arg (c.203A>G) is classified Uncertain significance in AIPL1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-01-05). AlphaMissense: likely benign (0.1884); Very rare (popmax 0.00167%, amr); Associated with Leber congenital amaurosis 4.

What condition is associated with AIPL1 p.Lys68Arg (c.203A>G)?

AIPL1 p.Lys68Arg (c.203A>G) is associated with Leber congenital amaurosis 4 (ClinVar).

How common is AIPL1 p.Lys68Arg (c.203A>G) in the general population?

AIPL1 p.Lys68Arg (c.203A>G) is very rare (popmax 0.00167%, amr) (gnomAD).

How is Cone rod dystrophy inherited?

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

What do computational predictors say about AIPL1 p.Lys68Arg (c.203A>G)?

AlphaMissense predicts likely benign (score 0.1884) — an in-silico prediction, not a clinical call.

AIPL1 p.Lys68Arg

c.203A>G · rs1912903029 · VCV1040845

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1884 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Leber congenital amaurosis 4

Computational evidence

Protein change
AlphaMissense	0.1884	likely benign
REVEL	0.704	pathogenic-leaning
SaProt	LLR -6.60	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.1	GERP 1.7, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 9,641 bp · p 0.35 · regional, not allelic
Overall
CADD	26.8	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/59,958 alleles

Filtering AF 6.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.9e-05%

Overall 0.000248% 4/1,613,410 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	59,958
European (non-Finnish)	0.000254%	393,317

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: AIPL1
Protein: p.Lys68Arg
Coding: c.203A>G
MANE Select: NM_014336
dbSNP: rs1912903029
Type: single nucleotide variant
Location: chr17:6433992 (GRCh38)
Gene constraint: LOEUF 1.01 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 83.42 · 6 PDB
Residue 68: the ppiase fkbp-type domain; a β-strand

Full AIPL1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Leber congenital amaurosis 4 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Cone rod dystrophy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Adolescent, Adult, Childhood
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

AIPL1 p.Lys68Gln Uncertain significance ★ ⚠ same residue
AIPL1 c.276+1G>A Pathogenic ★★★ same condition
AIPL1 c.277-2A>G Pathogenic ★★★ same condition
AIPL1 p.Ala197Pro Pathogenic ★★★ same condition
AIPL1 p.Arg270His Pathogenic ★★★ same condition
AIPL1 p.Arg32Ter Pathogenic ★★★ same condition
AIPL1 p.Asp51Gly Likely pathogenic ★★★ same condition
AIPL1 p.Cys239Arg 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/aipl1-p-lys68arg (accessed [today's date]).

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