# NM_203447.4(DOCK8):c.1441G>A (p.Asp481Asn)

https://sugi.bio/variant/dock8-p-asp481asn

## Summary

**DOCK8 p.Asp481Asn (c.1441G>A)** is classified **Uncertain significance** in DOCK8 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-09-28). AlphaMissense: likely benign (0.3188); Very rare (popmax 0.00333%, amr); Associated with hyper-IgE recurrent infection syndrome 3, autosomal recessive.

**At a glance:** Uncertain significance · review: Multiple submitters · rsID rs374938180 · 4 submitters · 2 linked conditions · AlphaMissense likely benign · very rare (popmax 0.00333%, amr)

## For patients & families {#patients}

This is a change in the DOCK8 gene that is currently of uncertain significance — a definitive interpretation has not yet been established, submitted by 4 submitters, and is linked to hyper-IgE recurrent infection syndrome 3, autosomal recessive.

*Reference information, not medical advice, and not a prediction for any individual. A genetic counselor or clinician can interpret what it means for you and your family.*

|  |  |
| --- | --- |
| Typical inheritance (of this condition) | Autosomal recessive |
| Age of onset (of this condition) | Infancy |
| Diagnostic panels | DOCK8 is a diagnostic-grade gene on 9 Genomics England panels |

**Support & next steps:** [Condition overview & support (NIH GARD)](https://rarediseases.info.nih.gov/diseases/0025713/index) · [Find a genetic counselor (NSGC)](https://findageneticcounselor.nsgc.org/).

## Identity {#identity}

| Field | Value |
| --- | --- |
| Gene | [DOCK8](https://sugi.bio/atlas/gene/DOCK8/) |
| Protein change (HGVS p.) | p.Asp481Asn |
| Coding change (HGVS c.) | c.1441G>A |
| MANE Select transcript | [NM_203447](https://www.ncbi.nlm.nih.gov/nuccore/NM_203447) |
| dbSNP | [rs374938180](https://www.ncbi.nlm.nih.gov/snp/rs374938180/) |
| Variant type | single nucleotide variant |
| Location | chr9:339024-339024 (GRCh38) |
| ClinVar | [VCV366675](https://www.ncbi.nlm.nih.gov/clinvar/variation/366675/) |

**All HGVS expressions:** `LRG_196:g.129160G>A`, `LRG_196t1:c.1441G>A`, `NC_000009.11:g.339024G>A`, `NC_000009.12:g.339024G>A`, `NG_017007.1:g.129160G>A`, `NM_001190458.2:c.1237G>A`, `NM_001193536.2:c.1237G>A`, `NM_203447.4:c.1441G>A`

## Computational & population evidence {#evidence}

**Concordance:** Mixed / partial computational evidence (see below).

- AlphaMissense **likely benign** (0.3188)
- REVEL 0.271 (benign-leaning) — agrees with AlphaMissense
- SaProt LLR -10.725 (damaging) — differs from AlphaMissense
- → **In-silico consensus:** SaProt calls this damaging; AlphaMissense and REVEL do not
- Conservation: phyloP 9.865, GERP 2.75, phastCons 1 — highly conserved (differs from AlphaMissense)
- CADD: **PHRED 32.0**. No single ClinGen-calibrated threshold exists and the expert panels that use CADD disagree — GUCY2D/AIPL1 require ≥ 20.0 for an untranslated-region variant, ABCA4 ≥ 28.1 for a synonymous or indel variant, the Pulmonary Hypertension panel imports Pejaver 2022's missense-calibrated numbers, and the Antibody Deficiencies panel declines CADD entirely for PIK3CD. CADD v1.7 also incorporates Zoonomia phyloP, so it partly re-expresses the conservation above. *Descriptive; no threshold applied.*
- Regional missense constraint: **o/e 1.15** across the covering region of the MANE Select transcript (214,977–449,883), spanning 234,906 bp. Chi-square p 6.4e-14. Describes the region, not this allele; gnomAD v4.1.1's own constrained determination. *Descriptive; no ACMG code applied.*
- SpliceAI: **not assessed** — no allele at this position is in our SpliceAI release, either because it lies outside the scored MANE transcript scope or because every allele is below Δ0.2. We cannot tell which, so this claims neither; absence is not evidence against a splicing effect.
- Population frequency (gnomAD v4.1): grpmax **0.00333%** (amr) · FAF95 0.00207% · FAF99 0.00183% · 2/60,034 in the highest group · 42/1,614,102 alleles overall — very rare (popmax 0.00333%, amr).

| Ancestry group | Allele frequency | 1 in |
| --- | --- | --- |
| Admixed American (grpmax) | 0.00333% | 30,017 |
| South Asian | 0.00329% | 30,362 |
| European (non-Finnish) | 0.00288% | 34,706 |
| East Asian | 0.00223% | 44,854 |
| Remaining individuals (not grpmax-eligible) | 0.0016% | 62,508 |
| African / African-American | 0.00133% | 75,066 |

*Computational predictors are not independent (ClinGen Variant Classification guidance): AlphaMissense (Cheng et al. 2023) carries the ACMG weight for missense and conservation (phyloP/GERP/phastCons) for non-missense; REVEL (Pejaver-2022 calibrated strength bands) and SaProt (Su et al. 2023, structure-aware, ClinVar-independent protein language model, raw LLR) are shown as orthogonal agreement signals, not additive. For frequency, the gnomAD v4.1 grpmax filtering allele frequency (FAF95) is ClinGen's designated BA1/BS1 input (gnomAD v4 guidance v3.0, June 2025); BA1/BS1 thresholds are disease-specific, not a blanket 5%. Predictions, not a clinical determination.*

## Gene constraint & dosage {#gene-context}

**DOCK8** population constraint: LOEUF 0.622, pLI 2.9093e-17, missense-Z -1.7115. *Lower LOEUF and higher pLI indicate a gene that tolerates loss-of-function poorly; ClinGen dosage is the curated haploinsufficiency call.*

Curated gene–disease validity (ClinGen):

- **combined immunodeficiency due to DOCK8 deficiency** — Definitive (AR)

## Protein context {#protein}


AlphaFold model confidence (whole protein): pLDDT 75.17, 27% of residues very-high.

## What this gene does {#gene-function}

*Describes the biological roles of DOCK8 (the gene this variant disrupts) — not effects measured for this specific variant. A damaging variant is expected to affect these functions and pathways; the degree depends on the variant.*

**How this variant is thought to act:** DOCK8's established molecular role includes guanyl-nucleotide exchange factor activity.


### Pathways affected {#pathways}

DOCK8 participates in **4 Reactome pathways** (⚕ = disease pathway):

| Pathway (Reactome) | Evidence |
| --- | --- |
| [CDC42 GTPase cycle](https://reactome.org/content/detail/R-HSA-9013148) | curated |
| [Factors involved in megakaryocyte development and platelet production](https://reactome.org/content/detail/R-HSA-983231) | curated |
| [RAC1 GTPase cycle](https://reactome.org/content/detail/R-HSA-9013149) | curated |
| [RHOJ GTPase cycle](https://reactome.org/content/detail/R-HSA-9013409) | curated |

### Molecular function & processes (GO — experimentally supported) {#go}

**Molecular function:** guanyl-nucleotide exchange factor activity.

**Biological process:** positive regulation of GTPase activity, memory T cell proliferation, positive regulation of establishment of T cell polarity, cellular response to chemokine, positive regulation of T cell migration.

## Clinical significance {#significance}

**Uncertain significance** — review status Multiple submitters *(criteria provided, multiple submitters, no conflicts)*, last evaluated 2025-09-28.

**Submitter consensus:** conflicting (3 Uncertain significance, 1 not provided).

**Submission history:** 4 submissions (2018–2025); classifications have differed over time.

### Submitter classifications {#submitters}

| Submitter | Classification | Review | Method | Date |
| --- | --- | --- | --- | --- |
| Illumina Laboratory Services, Illumina | Uncertain significance | criteria provided, single submitter | clinical testing | 2018-01-13 |
| Labcorp Genetics (formerly Invitae), Labcorp | Uncertain significance | criteria provided, single submitter | clinical testing | 2023-06-13 |
| GenomeConnect - Invitae Patient Insights Network | not provided | no classification provided | phenotyping only |  |
| Ambry Genetics | Uncertain significance | criteria provided, single submitter | clinical testing | 2025-09-28 |

## Associated conditions {#conditions}

[hyper-IgE recurrent infection syndrome 3, autosomal recessive](https://sugi.bio/atlas/disease/hyper-ige-recurrent-infection-syndrome-3-autosomal-recessive/), [combined immunodeficiency due to DOCK8 deficiency](https://sugi.bio/atlas/disease/combined-immunodeficiency-due-to-dock8-deficiency/).

**Reported phenotype names (ClinVar):** Hyper-IgE recurrent infection syndrome 3, autosomal recessive, Combined immunodeficiency due to DOCK8 deficiency, Inborn genetic diseases, HYPER-IgE SYNDROME 3, AUTOSOMAL RECESSIVE, WITH RECURRENT INFECTIONS, Autosomal recessive hyper-IgE syndrome due to ZNF341 deficiency, HIES autosomal recessive, Hyper-IgE recurrent infection syndrome, autosomal recessive, HYPER-IgE RECURRENT INFECTION SYNDROME 2, AUTOSOMAL RECESSIVE, HYPER-IgE SYNDROME 2, AUTOSOMAL RECESSIVE, WITH RECURRENT INFECTIONS, DOCK8 Deficiency.

## Similar variants {#similar}

Related DOCK8 variant pages (same residue, condition, or type): [DOCK8 c.1680-2A>G](/variant/dock8-c-1680-minus-2a-g), [DOCK8 c.2779-2A>C](/variant/dock8-c-2779-minus-2a-c), [DOCK8 c.2971-1G>A](/variant/dock8-c-2971-minus-1g-a), [DOCK8 c.3530+1G>A](/variant/dock8-c-3530-plus-1g-a), [DOCK8 c.528+1G>A](/variant/dock8-c-528-plus-1g-a), [DOCK8 c.529-2A>G](/variant/dock8-c-529-minus-2a-g), [DOCK8 p.Arg1388Ter](/variant/dock8-p-arg1388ter), [DOCK8 p.Arg1796Ter](/variant/dock8-p-arg1796ter).

### Data sources & attribution {#sources}

ClinVar (NCBI — public domain, built 2026-10-11); gnomAD v4.1 (Broad Institute, built 2026-10-06); AlphaMissense (Cheng et al. 2023, © Google DeepMind — CC BY 4.0, built 2026-01-27); REVEL (Ioannidis et al. 2016 — ODbL, built 2026-07-13); SaProt (Su et al. 2023 — MIT, built 2026-07-14); SpliceAI (Illumina — free for non-commercial use, built 2026-10-13); CADD (Rentzsch et al. 2019, University of Washington — free for non-commercial use, built 2026-10-10); Conservation (phyloP/phastCons/GERP) (UCSC hg38 470-way mammal (Hiller Lab) + Ensembl Compara, built 2026-07-12); gnomAD Non-coding Constraint (Gnocchi) (Chen et al. 2024, Broad Institute — CC0, built 2026-10-11); gnomAD Regional Missense Constraint (Broad Institute — CC0, built 2026-10-13); Pangolin (Zeng & Li 2022 — CC BY 4.0, built 2026-10-11); Repeat regions (UCSC — RepeatMasker, TRF, segmental duplications, built 2026-10-11); ClinGen (ClinGen, built 2026-09-22); UniProt (CC BY 4.0); Reactome / GO (CC BY 4.0, built 2026-09-23); MaveDB (per-record license, built 2026-10-11); CIViC (CC0, built 2026-09-22); Orphanet (Orphanet, built 2026-06-12)

*Primary record: NCBI ClinVar (variation 366675). Classifications reflect these databases as of the page's build date and may change. Free reference use — not medical advice; consult the primary submitters and a clinician.*