Is MYO7A p.Arg866His (c.2597G>A) pathogenic?

MYO7A p.Arg866His (c.2597G>A) is classified Uncertain significance in MYO7A (ClinVar, Multiple submitters, 6 submitters; last evaluated 2023-09-29). AlphaMissense: likely benign (0.1918); Very rare (popmax 0.0033%, sas); Associated with autosomal recessive nonsyndromic hearing loss 2.

What condition is associated with MYO7A p.Arg866His (c.2597G>A)?

MYO7A p.Arg866His (c.2597G>A) is associated with autosomal recessive nonsyndromic hearing loss 2, Usher syndrome type 1, autosomal dominant nonsyndromic hearing loss 11 (ClinVar).

How common is MYO7A p.Arg866His (c.2597G>A) in the general population?

MYO7A p.Arg866His (c.2597G>A) is very rare (popmax 0.0033%, sas) (gnomAD).

What do computational predictors say about MYO7A p.Arg866His (c.2597G>A)?

AlphaMissense predicts likely benign (score 0.1918) — an in-silico prediction, not a clinical call.

MYO7A p.Arg866His

c.2597G>A · rs199607235 · VCV666885

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

AlphaMissense

likely benign

0.1918 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0033%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

autosomal recessive nonsyndromic hearing loss 2

Computational evidence

Protein change
AlphaMissense	0.1918	likely benign
REVEL	0.521	indeterminate
SaProt	LLR -9.59	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>T here scores Δ0.23 · evaluated, not missing
Constraint at this position
Conservation	phyloP 9.7	GERP 1.6, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 84 kb · p 0.0065 · regional, not allelic
Overall
CADD	23.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0033% South Asian · 3/90,844 alleles

Filtering AF 0.000877% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000539%

Overall 0.00149% 24/1,612,248 alleles · very rare exomes 20/1,460,098 · genomes 4/152,150 · joint denominator

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0048%	20,812
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,598
South Asiangrpmax	0.0033%	30,281
African / African-American	0.00267%	37,448
Finnishnot grpmax-eligible	0.00159%	62,998
European (non-Finnish)	0.00119%	84,263

Remaining individuals 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: MYO7A
Protein: p.Arg866His
Coding: c.2597G>A
MANE Select: NM_000260
dbSNP: rs199607235
Type: single nucleotide variant
Location: chr11:77180384 (GRCh38)
Gene constraint: LOEUF 0.995 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.73 · 1 PDB
Residue 866: the 'sah' region

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

Disease context

autosomal recessive nonsyndromic hearing loss 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Usher syndrome type 1 autosomal dominant nonsyndromic hearing loss 11 Usher syndrome type 1B

Similar variants

MYO7A p.Arg866= Conflicting classifications of pathogenicity ★ same residue
MYO7A p.Arg866Cys Uncertain significance ★★ same residue
MYO7A p.Arg866Pro Uncertain significance ★ ⚠ same residue
MYO7A p.Arg866Ser 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

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-arg866his (accessed [today's date]).

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