Is DOCK8 p.Val1666= (c.4998G>C) pathogenic?

DOCK8 p.Val1666= (c.4998G>C) is classified Likely benign in DOCK8 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2026-04-20). Ultra-rare (popmax 0.0192%, nfe); Associated with combined immunodeficiency due to DOCK8 deficiency.

What condition is associated with DOCK8 p.Val1666= (c.4998G>C)?

DOCK8 p.Val1666= (c.4998G>C) is associated with combined immunodeficiency due to DOCK8 deficiency (ClinVar).

How common is DOCK8 p.Val1666= (c.4998G>C) in the general population?

DOCK8 p.Val1666= (c.4998G>C) is ultra-rare (popmax 0.0192%, nfe) (gnomAD).

DOCK8 p.Val1666=

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.4998G>C · rs370901183 · VCV504725

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0192%, nfe)

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 -0.44	GERP -5.3, phastCons 0.003
Overall
CADD	2.288	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0192% European (non-Finnish) · 227/1,180,044 alleles

Filtering AF 0.0171% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0163%

Overall 0.0156% 251/1,613,810 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0192%	5,198
Finnishnot grpmax-eligible	0.0172%	5,817
Middle Eastern	0.017%	5,896
Remaining individualsnot grpmax-eligible	0.016%	6,247
Admixed American	0.00333%	30,001

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.Val1666=
Coding: c.4998G>C
MANE Select: NM_203447
dbSNP: rs370901183
Type: single nucleotide variant
Location: chr9:434894 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.17
Residue 1666: the docker 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 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
DOCK8 p.Arg1796Ter 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-val1666 (accessed [today's date]).

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