Is DOCK8 p.Val662= (c.1986G>A) pathogenic?

DOCK8 p.Val662= (c.1986G>A) is classified Likely benign in DOCK8 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-06-09). Ultra-rare (popmax 0.0165%, sas); Associated with combined immunodeficiency due to DOCK8 deficiency.

What condition is associated with DOCK8 p.Val662= (c.1986G>A)?

DOCK8 p.Val662= (c.1986G>A) is associated with combined immunodeficiency due to DOCK8 deficiency (ClinVar).

How common is DOCK8 p.Val662= (c.1986G>A) in the general population?

DOCK8 p.Val662= (c.1986G>A) is ultra-rare (popmax 0.0165%, sas) (gnomAD).

DOCK8 p.Val662=

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.1986G>A · rs777821805 · VCV719686

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, sas)

Conditions

combined immunodeficiency due to DOCK8 deficiency

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 -0.36	GERP -5.5, phastCons 0.001
Overall
CADD	2.35	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0165% South Asian · 15/91,086 alleles

Filtering AF 0.0101% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00811%

Overall 0.00242% 39/1,614,034 alleles · ultra-rare exomes 33/1,461,866 · genomes 6/152,168 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0165%	6,072
East Asian	0.00446%	22,443
European (non-Finnish)	0.00178%	56,192
African / African-American	0.00133%	74,922

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.Val662=
Coding: c.1986G>A
MANE Select: NM_203447
dbSNP: rs777821805
Type: single nucleotide variant
Location: chr9:371545 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.17
Residue 662: the c2 dock-type domain

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.Val662Met 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-val662 (accessed [today's date]).

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