Is MYO7B p.Arg1334Cys (c.4000C>T) pathogenic?

MYO7B p.Arg1334Cys (c.4000C>T) is classified Uncertain significance in MYO7B (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-03). AlphaMissense: likely benign (0.0911); Ultra-rare (popmax 0.0175%, afr).

How common is MYO7B p.Arg1334Cys (c.4000C>T) in the general population?

MYO7B p.Arg1334Cys (c.4000C>T) is ultra-rare (popmax 0.0175%, afr) (gnomAD).

What do computational predictors say about MYO7B p.Arg1334Cys (c.4000C>T)?

AlphaMissense predicts likely benign (score 0.0911) — an in-silico prediction, not a clinical call.

MYO7B p.Arg1334Cys

c.4000C>T · rs369906419 · VCV2514339

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0911 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0175%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0911	likely benign
REVEL	0.149	moderately benign-leaning
SaProt	LLR -7.37	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 1.7	GERP 0.5, phastCons 0.077
Regional constraint	o/e 0.94	unconstrained · MANE · 69 kb · p 0.0075 · regional, not allelic
Overall
CADD	17.72	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R1308C vs ClinVar R1334C) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0175% African / African-American · 13/74,496 alleles

Filtering AF 0.0103% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00817%

Overall 0.0044% 70/1,591,682 alleles · ultra-rare exomes 54/1,439,326 · genomes 16/152,356 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0175%	5,730
European (non-Finnish)	0.00436%	22,937
Admixed American	0.00347%	28,812
South Asian	0.0023%	43,509
East Asian	0.00229%	43,624
Remaining individualsnot grpmax-eligible	0.00162%	61,710

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.Arg1334Cys
Coding: c.4000C>T
MANE Select: NM_001393586
dbSNP: rs369906419
Type: single nucleotide variant
Location: chr2:127624273 (GRCh38)
Gene constraint: LOEUF 0.956 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.34 · 3 PDB
Residue 1308 UniProt numbering: the 'mediates interaction with anks4b' region; the ferm 1 domain

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

Similar variants

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
MYO7B p.Ala1109Thr Uncertain significance ★ ⚠ same type
MYO7B p.Ala1126Thr 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-arg1334cys (accessed [today's date]).

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