Is DOK7 p.Ala303= (c.909T>C) pathogenic?

DOK7 p.Ala303= (c.909T>C) is classified Benign in DOK7 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-07-29). Ultra-rare (popmax 0.0992%, afr); Associated with congenital myasthenic syndrome 10.

What condition is associated with DOK7 p.Ala303= (c.909T>C)?

DOK7 p.Ala303= (c.909T>C) is associated with congenital myasthenic syndrome 10, fetal akinesia deformation sequence 1 (ClinVar).

How common is DOK7 p.Ala303= (c.909T>C) in the general population?

DOK7 p.Ala303= (c.909T>C) is ultra-rare (popmax 0.0992%, afr) (gnomAD).

DOK7 p.Ala303=

c.909T>C · rs774070355 · VCV1939563

Benign Single submitter

Classification

Benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0992%, afr)

Conditions

congenital myasthenic syndrome 10

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -10	GERP -2.2
Overall
CADD	0.155	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0992% African / African-American · 74/74,606 alleles

Filtering AF 0.081% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0743%

Overall 0.00491% 78/1,590,182 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0992%	1,008
Admixed American	0.00351%	28,465
Remaining individualsnot grpmax-eligible	0.00162%	61,644
European (non-Finnish)	8.54e-05%	1,170,787

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: DOK7
Protein: p.Ala303=
Coding: c.909T>C
MANE Select: NM_173660
dbSNP: rs774070355
Type: single nucleotide variant
Location: chr4:3492895 (GRCh38)
Gene constraint: LOEUF 1.658 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 65.61
Residue 303: the 'disordered' region

Full DOK7 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

congenital myasthenic syndrome 10 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: fetal akinesia deformation sequence 1

Similar variants

DOK7 p.Ala303Thr Uncertain significance ★ ⚠ same residue
DOK7 c.331+1G>T Pathogenic ★★ same condition
DOK7 c.332-1G>A Likely pathogenic ★★ same condition
DOK7 c.332-1G>C Likely pathogenic ★★ same condition
DOK7 c.332-1G>T Likely pathogenic ★★ same condition
DOK7 p.Arg158Gln Pathogenic/Likely pathogenic ★★ same condition
DOK7 p.Arg201Ter Pathogenic ★★ same condition
DOK7 p.Cys412Ter 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/dok7-p-ala303 (accessed [today's date]).

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