Is MYO7A p.Arg740Trp (c.2218C>T) pathogenic?

MYO7A p.Arg740Trp (c.2218C>T) is classified Conflicting classifications of pathogenicity in MYO7A (ClinVar, Conflicting submitters, 7 submitters; last evaluated 2026-03-04). AlphaMissense: likely pathogenic (0.9537); Ultra-rare (popmax 0.0853%, afr); Associated with Usher syndrome type 1.

What condition is associated with MYO7A p.Arg740Trp (c.2218C>T)?

MYO7A p.Arg740Trp (c.2218C>T) 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.Arg740Trp (c.2218C>T) in the general population?

MYO7A p.Arg740Trp (c.2218C>T) is ultra-rare (popmax 0.0853%, 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.Arg740Trp (c.2218C>T)?

AlphaMissense predicts likely pathogenic (score 0.9537) — an in-silico prediction, not a clinical call.

MYO7A p.Arg740Trp

c.2218C>T · rs201234369 · VCV43176

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 7 submitters

AlphaMissense

likely pathogenic

0.9537 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0853%, afr)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Usher syndrome type 1

Computational evidence

Protein change
AlphaMissense	0.9537	likely pathogenic
REVEL	0.815	moderately pathogenic-leaning
SaProt	LLR -14.15	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.27	GERP -0.85, phastCons 0.97
Regional constraint	o/e 0.95	unconstrained · MANE · 84 kb · p 0.0065 · regional, not allelic
Overall
CADD	25.9	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 0.0853% African / African-American · 64/74,986 alleles

Filtering AF 0.0686% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0625%

Overall 0.0049% 79/1,611,888 alleles · ultra-rare exomes 41/1,459,648 · genomes 38/152,240 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0853%	1,172
Middle Eastern	0.0165%	6,058
East Asian	0.00892%	11,214
Admixed American	0.00334%	29,930
Remaining individualsnot grpmax-eligible	0.0032%	31,214
South Asian	0.00221%	45,269
European (non-Finnish)	0.000339%	294,830

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.Arg740Trp
Coding: c.2218C>T
MANE Select: NM_000260
dbSNP: rs201234369
Type: single nucleotide variant
Location: chr11:77177579 (GRCh38)
Gene constraint: LOEUF 0.995 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73 · 1 PDB
Residue 740: 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 Usher syndrome type 1B

For Usher syndrome (Orphanet):

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

Similar variants

MYO7A p.Arg740fs Likely pathogenic ★ same residue
MYO7A p.Arg740Pro Likely pathogenic ★ same residue
MYO7A p.Arg740Gln Uncertain significance ★ ⚠ 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

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-arg740trp (accessed [today's date]).

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