Is MYO7B p.Arg478Cys (c.1432C>T) pathogenic?

MYO7B p.Arg478Cys (c.1432C>T) is classified Uncertain significance in MYO7B (ClinVar, Single submitter, 1 submitter; last evaluated 2024-02-28). AlphaMissense: likely benign (0.0812); Ultra-rare (popmax 0.0417%, sas).

How common is MYO7B p.Arg478Cys (c.1432C>T) in the general population?

MYO7B p.Arg478Cys (c.1432C>T) is ultra-rare (popmax 0.0417%, sas) (gnomAD).

What do computational predictors say about MYO7B p.Arg478Cys (c.1432C>T)?

AlphaMissense predicts likely benign (score 0.0812) — an in-silico prediction, not a clinical call.

MYO7B p.Arg478Cys

c.1432C>T · rs746922996 · VCV3166101

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0812 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0417%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Computational evidence

Protein change
AlphaMissense	0.0812	likely benign
REVEL	0.401	indeterminate
SaProt	LLR -9.36	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.011	GERP -4.1, phastCons 0.001
Regional constraint	o/e 0.94	unconstrained · MANE · 69 kb · p 0.0075 · regional, not allelic
Overall
CADD	19.34	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 0.0417% South Asian · 38/91,084 alleles

Filtering AF 0.0312% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0275%

Overall 0.00533% 86/1,613,844 alleles · ultra-rare exomes 80/1,461,698 · genomes 6/152,146 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0417%	2,397
European (non-Finnish)	0.00381%	26,220
Remaining individualsnot grpmax-eligible	0.0032%	31,233
African / African-American	0.00134%	74,902

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: MYO7B
Protein: p.Arg478Cys
Coding: c.1432C>T
MANE Select: NM_001393586
dbSNP: rs746922996
Type: single nucleotide variant
Location: chr2:127584210 (GRCh38)
Gene constraint: LOEUF 0.956 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.34 · 3 PDB
Residue 478: the myosin motor domain

Full MYO7B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

MYO7B p.Arg478His Uncertain significance ★ ⚠ same residue
MYO7B p.Arg478Leu Uncertain significance ★ ⚠ same residue
MYO7B p.Thr349Met Uncertain significance ★★ ⚠ same type
MYO7B p.Ile1309Val Benign ★★ same type
MYO7B p.Val1556Ile Benign ★★ same type
MYO7B p.Val1876= Benign ★★ same type
MYO7B p.Ala1010Thr Uncertain significance ★ ⚠ same type
MYO7B p.Ala1092Thr Uncertain significance ★ ⚠ same type

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/myo7b-p-arg478cys (accessed [today's date]).

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