Is MYO7A p.Ala226Thr (c.676G>A) pathogenic?

MYO7A p.Ala226Thr (c.676G>A) is classified Conflicting classifications of pathogenicity in MYO7A (ClinVar, Conflicting submitters, 8 submitters; last evaluated 2026-01-24). AlphaMissense: likely benign (0.3285); Rare (popmax 0.111%, afr); Associated with Usher syndrome type 1.

What condition is associated with MYO7A p.Ala226Thr (c.676G>A)?

MYO7A p.Ala226Thr (c.676G>A) is associated with Usher syndrome type 1, autosomal recessive nonsyndromic hearing loss 2, autosomal dominant nonsyndromic hearing loss 11 (ClinVar).

How common is MYO7A p.Ala226Thr (c.676G>A) in the general population?

MYO7A p.Ala226Thr (c.676G>A) is rare (popmax 0.111%, afr) (gnomAD).

How is Usher syndrome inherited?

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

What do computational predictors say about MYO7A p.Ala226Thr (c.676G>A)?

AlphaMissense predicts likely benign (score 0.3285) — an in-silico prediction, not a clinical call.

MYO7A p.Ala226Thr

c.676G>A · rs201753022 · VCV291005

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 8 submitters

AlphaMissense

likely benign

0.3285 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.111%, afr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

Usher syndrome type 1

Computational evidence

Protein change
AlphaMissense	0.3285	likely benign
REVEL	0.611	indeterminate
SaProt	LLR -6.64	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.9, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 84 kb · p 0.0065 · regional, not allelic
Overall
CADD	24.2	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 0.111% African / African-American · 83/75,074 alleles

Filtering AF 0.0914% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0843%

Overall 0.0281% 454/1,613,978 alleles · rare exomes 384/1,461,634 · genomes 70/152,344 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.111%	905
European (non-Finnish)	0.0289%	3,460
Remaining individualsnot grpmax-eligible	0.0224%	4,463
Admixed American	0.0117%	8,576
Finnishnot grpmax-eligible	0.00782%	12,790
South Asian	0.00439%	22,770

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: MYO7A
Protein: p.Ala226Thr
Coding: c.676G>A
MANE Select: NM_000260
dbSNP: rs201753022
Type: single nucleotide variant
Location: chr11:77156945 (GRCh38)
Gene constraint: LOEUF 0.995 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73 · 1 PDB
Residue 226: the myosin motor domain

Full MYO7A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Usher syndrome type 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: autosomal recessive nonsyndromic hearing loss 2 autosomal dominant nonsyndromic hearing loss 11

For Usher syndrome (Orphanet):

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

Similar variants

MYO7A p.Ala226Val Uncertain significance ★ same residue
MYO7A p.Ala226= Likely benign ★ same residue
MYO7A p.Ala1288Pro Likely pathogenic ★★★ same condition
MYO7A p.Arg1168Gln Pathogenic ★★★ ⚠ same condition
MYO7A p.Arg1873Gln Pathogenic ★★★ ⚠ same condition
MYO7A p.Arg395Cys Likely pathogenic ★★★ ⚠ same condition
MYO7A p.Arg668Cys Pathogenic ★★★ same condition
MYO7A p.Arg853His 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/myo7a-p-ala226thr (accessed [today's date]).

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