Is USH2A p.Ser4774= (c.14322C>T) pathogenic?

USH2A p.Ser4774= (c.14322C>T) is classified Likely benign in USH2A (ClinVar, Multiple submitters, 5 submitters; last evaluated 2026-01-28). Rare (popmax 0.215%, afr); Associated with Usher syndrome type 2A.

What condition is associated with USH2A p.Ser4774= (c.14322C>T)?

USH2A p.Ser4774= (c.14322C>T) is associated with Usher syndrome type 2A, retinitis pigmentosa 39 (ClinVar).

How common is USH2A p.Ser4774= (c.14322C>T) in the general population?

USH2A p.Ser4774= (c.14322C>T) is rare (popmax 0.215%, afr) (gnomAD).

USH2A p.Ser4774=

c.14322C>T · rs147037435 · VCV48435

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

rare (popmax 0.215%, afr)

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 -0.003	GERP -4
Overall
CADD	0.866	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.215% African / African-American · 161/75,026 alleles

Filtering AF 0.188% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.177%

Overall 0.0129% 209/1,614,120 alleles · rare exomes 118/1,461,880 · genomes 91/152,240 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.215%	466
Remaining individualsnot grpmax-eligible	0.0272%	3,677
South Asian	0.00769%	13,012
Admixed American	0.005%	20,006
European (non-Finnish)	0.00178%	56,191

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.Ser4774=
Coding: c.14322C>T
MANE Select: NM_206933
dbSNP: rs147037435
Type: single nucleotide variant
Location: chr1:215650613 (GRCh38)
Gene constraint: LOEUF 0.855 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 4774: the fibronectin type-iii 33 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.Ser4774Arg 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
USH2A p.Asn346His 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-ser4774 (accessed [today's date]).

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