Is AHI1 p.Pro522= (c.1566A>G) pathogenic?

AHI1 p.Pro522= (c.1566A>G) is classified Likely benign in AHI1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-12). Ultra-rare (popmax 0.0107%, afr); Associated with Joubert syndrome.

What condition is associated with AHI1 p.Pro522= (c.1566A>G)?

AHI1 p.Pro522= (c.1566A>G) is associated with Joubert syndrome (ClinVar).

How common is AHI1 p.Pro522= (c.1566A>G) in the general population?

AHI1 p.Pro522= (c.1566A>G) is ultra-rare (popmax 0.0107%, afr) (gnomAD).

AHI1 p.Pro522=

c.1566A>G · rs765975049 · VCV1096433

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0107%, afr)

Conditions

Joubert syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.132	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.15	GERP 0.35, phastCons 0.99
Overall
CADD	9.281	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0107% African / African-American · 8/74,920 alleles

Filtering AF 0.00528% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00381%

Overall 0.000559% 9/1,611,260 alleles · ultra-rare exomes 3/1,459,076 · genomes 6/152,184 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0107%	9,365
Remaining individualsnot grpmax-eligible	0.0016%	62,316

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: AHI1
Protein: p.Pro522=
Coding: c.1566A>G
MANE Select: NM_001134831
dbSNP: rs765975049
Type: single nucleotide variant
Location: chr6:135448350 (GRCh38)
Gene constraint: LOEUF 1.069 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 62.03 · 1 PDB

Full AHI1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Joubert syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

AHI1 c.1152-1G>A Pathogenic/Likely pathogenic ★★ same condition
AHI1 c.1152-2A>G Pathogenic ★★ same condition
AHI1 c.1626+1G>A Pathogenic/Likely pathogenic ★★ same condition
AHI1 c.1779+1G>T Pathogenic/Likely pathogenic ★★ same condition
AHI1 c.2492+1G>A Pathogenic/Likely pathogenic ★★ same condition
AHI1 c.2623+1G>A Pathogenic ★★ same condition
AHI1 c.2623+1G>T Pathogenic ★★ same condition
AHI1 c.3426+2T>C 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/ahi1-p-pro522 (accessed [today's date]).

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