Is USH2A p.Ala2929= (c.8787C>G) pathogenic?

USH2A p.Ala2929= (c.8787C>G) is classified Likely benign in USH2A (ClinVar, Multiple submitters, 5 submitters; last evaluated 2024-10-11). Ultra-rare (popmax 0.022%, sas); Associated with Usher syndrome type 2A.

What condition is associated with USH2A p.Ala2929= (c.8787C>G)?

USH2A p.Ala2929= (c.8787C>G) is associated with Usher syndrome type 2A, retinitis pigmentosa 39 (ClinVar).

How common is USH2A p.Ala2929= (c.8787C>G) in the general population?

USH2A p.Ala2929= (c.8787C>G) is ultra-rare (popmax 0.022%, sas) (gnomAD).

USH2A p.Ala2929=

c.8787C>G · rs371183424 · VCV765974

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.022%, sas)

Conditions

Usher syndrome type 2A

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 1.7	GERP -0.87, phastCons 0.92
Overall
CADD	3.438	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.022% South Asian · 20/91,080 alleles

Filtering AF 0.0145% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0121%

Overall 0.00359% 58/1,614,134 alleles · ultra-rare exomes 54/1,461,868 · genomes 4/152,266 · joint denominator

Ancestry group	Frequency	1 in
Ashkenazi Jewishnot grpmax-eligible	0.0473%	2,115
South Asiangrpmax	0.022%	4,554
Middle Eastern	0.0165%	6,062
Remaining individualsnot grpmax-eligible	0.0112%	8,930
African / African-American	0.00133%	75,038
European (non-Finnish)	0.00127%	78,668

Ashkenazi Jewish 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: USH2A
Protein: p.Ala2929=
Coding: c.8787C>G
MANE Select: NM_206933
dbSNP: rs371183424
Type: single nucleotide variant
Location: chr1:215867065 (GRCh38)
Gene constraint: LOEUF 0.855 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 2929: the fibronectin type-iii 16 domain

Full USH2A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Usher syndrome type 2A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: retinitis pigmentosa 39

Similar variants

USH2A p.Ala2929Val Uncertain significance ★ ⚠ same residue
USH2A p.Ala2929Thr Uncertain significance ⚠ same residue
USH2A c.12295-3T>A Pathogenic ★★★ same condition
USH2A c.8559-2A>G Pathogenic ★★★ same condition
USH2A c.8682-9A>G Pathogenic ★★★ same condition
USH2A p.Ala4740Asp Pathogenic ★★★ ⚠ same condition
USH2A p.Arg3905Cys Pathogenic ★★★ ⚠ same condition
USH2A p.Arg4192Cys 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/ush2a-p-ala2929 (accessed [today's date]).

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