Is DOCK8 p.Arg209Gln (c.626G>A) pathogenic?

DOCK8 p.Arg209Gln (c.626G>A) is classified Uncertain significance in DOCK8 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-10-13). AlphaMissense: likely benign (0.1336); Ultra-rare (popmax 0.0573%, afr); Associated with combined immunodeficiency due to DOCK8 deficiency.

What condition is associated with DOCK8 p.Arg209Gln (c.626G>A)?

DOCK8 p.Arg209Gln (c.626G>A) is associated with combined immunodeficiency due to DOCK8 deficiency (ClinVar).

How common is DOCK8 p.Arg209Gln (c.626G>A) in the general population?

DOCK8 p.Arg209Gln (c.626G>A) is ultra-rare (popmax 0.0573%, afr) (gnomAD).

What do computational predictors say about DOCK8 p.Arg209Gln (c.626G>A)?

AlphaMissense predicts likely benign (score 0.1336) — an in-silico prediction, not a clinical call.

DOCK8 p.Arg209Gln

Q: How is Combined immunodeficiency due to DOCK8 deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.626G>A · rs151262535 · VCV366545

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

likely benign

0.1336 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0573%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

combined immunodeficiency due to DOCK8 deficiency

Computational evidence

Protein change
AlphaMissense	0.1336	likely benign
REVEL	0.128	moderately benign-leaning
SaProt	LLR -6.00	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.9	GERP 1.6, phastCons 1
Regional constraint	o/e 1.15	unconstrained · MANE · 235 kb · p 6.4e-14 · regional, not allelic
Overall
CADD	22.8	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 0.0573% African / African-American · 43/75,052 alleles

Filtering AF 0.0436% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0389%

Overall 0.00768% 124/1,614,200 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0573%	1,745
Middle Eastern	0.033%	3,031
Remaining individualsnot grpmax-eligible	0.0096%	10,418
European (non-Finnish)	0.00576%	17,353
Admixed American	0.00333%	30,009
South Asian	0.0022%	45,538
Finnishnot grpmax-eligible	0.00156%	64,044

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: DOCK8
Protein: p.Arg209Gln
Coding: c.626G>A
MANE Select: NM_203447
dbSNP: rs151262535
Type: single nucleotide variant
Location: chr9:312051 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.17

Full DOCK8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

combined immunodeficiency due to DOCK8 deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Combined immunodeficiency due to DOCK8 deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

DOCK8 p.Arg209Trp Uncertain significance ★ ⚠ same residue
DOCK8 c.1680-2A>G Likely pathogenic ★★ same condition
DOCK8 c.2779-2A>C Likely pathogenic ★★ same condition
DOCK8 c.2971-1G>A Pathogenic ★★ same condition
DOCK8 c.3530+1G>A Likely pathogenic ★★ same condition
DOCK8 c.528+1G>A Likely pathogenic ★★ same condition
DOCK8 c.529-2A>G Likely pathogenic ★★ same condition
DOCK8 p.Arg1388Ter 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/dock8-p-arg209gln (accessed [today's date]).

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