Is MYO7A p.Arg668His (c.2003G>A) pathogenic?

MYO7A p.Arg668His (c.2003G>A) is classified Conflicting classifications of pathogenicity in MYO7A (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2026-01-29). AlphaMissense: likely pathogenic (0.9798); Very rare (popmax 0.00017%, nfe); Associated with autosomal dominant nonsyndromic hearing loss 11.

What condition is associated with MYO7A p.Arg668His (c.2003G>A)?

MYO7A p.Arg668His (c.2003G>A) is associated with autosomal dominant nonsyndromic hearing loss 11, Usher syndrome type 1B (ClinVar).

How common is MYO7A p.Arg668His (c.2003G>A) in the general population?

MYO7A p.Arg668His (c.2003G>A) is very rare (popmax 0.00017%, nfe) (gnomAD).

What do computational predictors say about MYO7A p.Arg668His (c.2003G>A)?

AlphaMissense predicts likely pathogenic (score 0.9798) — an in-silico prediction, not a clinical call.

MYO7A p.Arg668His

c.2003G>A · rs368575149 · VCV968152

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

AlphaMissense

likely pathogenic

0.9798 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00017%, nfe)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autosomal dominant nonsyndromic hearing loss 11

Computational evidence

Protein change
AlphaMissense	0.9798	likely pathogenic
REVEL	0.886	moderately pathogenic-leaning
SaProt	LLR -12.24	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 12	GERP 1.8, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 84 kb · p 0.0065 · regional, not allelic
Overall
CADD	33.0	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 0.00017% European (non-Finnish) · 2/1,179,784 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000124% 2/1,613,276 alleles · very rare exomes 2/1,460,934 · genomes 0/152,342 · joint denominator

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.Arg668His
Coding: c.2003G>A
MANE Select: NM_000260
dbSNP: rs368575149
Type: single nucleotide variant
Location: chr11:77174823 (GRCh38)
Gene constraint: LOEUF 0.995 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73 · 1 PDB
Residue 668: the myosin motor domain

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

Disease context

autosomal dominant nonsyndromic hearing loss 11 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Usher syndrome type 1B

Similar variants

MYO7A p.Arg668Cys Pathogenic ★★★ same residue
MYO7A p.Arg668Leu Uncertain significance ★ ⚠ same residue
MYO7A p.Arg668Pro Likely pathogenic ★ 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.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-arg668his (accessed [today's date]).

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