Is STAT3 p.Ser381= (c.1143C>G) pathogenic?

STAT3 p.Ser381= (c.1143C>G) is classified Benign/Likely benign in STAT3 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-12-24). Rare (popmax 0.136%, sas); Associated with hyper-IgE recurrent infection syndrome 1, autosomal dominant.

What condition is associated with STAT3 p.Ser381= (c.1143C>G)?

STAT3 p.Ser381= (c.1143C>G) is associated with hyper-IgE recurrent infection syndrome 1, autosomal dominant (ClinVar).

How common is STAT3 p.Ser381= (c.1143C>G) in the general population?

STAT3 p.Ser381= (c.1143C>G) is rare (popmax 0.136%, sas) (gnomAD).

STAT3 p.Ser381=

Q: How is Autosomal dominant hyper-IgE syndrome due to STAT3 deficiency inherited?

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

c.1143C>G · rs143571879 · VCV712352

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

rare (popmax 0.136%, sas)

Conditions

hyper-IgE recurrent infection syndrome 1, autosomal dominant

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 1.9	GERP -3.7, phastCons 1
Overall
CADD	9.183	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.136% South Asian · 124/91,082 alleles

Filtering AF 0.117% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.109%

Overall 0.0149% 241/1,614,160 alleles · rare exomes 216/1,461,880 · genomes 25/152,280 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.136%	735
Middle Eastern	0.0165%	6,062
Remaining individualsnot grpmax-eligible	0.0128%	7,813
European (non-Finnish)	0.00881%	11,346
Admixed American	0.00333%	30,005
Finnishnot grpmax-eligible	0.00156%	64,034
African / African-American	0.00133%	75,026

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: STAT3
Protein: p.Ser381=
Coding: c.1143C>G
MANE Select: NM_139276
dbSNP: rs143571879
Type: single nucleotide variant
Location: chr17:42329644 (GRCh38)
Gene constraint: LOEUF 0.109 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 85.80 · 6 PDB

Full STAT3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hyper-IgE recurrent infection syndrome 1, autosomal dominant — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal dominant hyper-IgE syndrome due to STAT3 deficiency (Orphanet):

Inheritance: Autosomal dominant
Onset: Infancy, Neonatal
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

STAT3 p.Arg152Trp Pathogenic ★★ ⚠ same condition
STAT3 p.Arg278Cys Likely pathogenic ★★ same condition
STAT3 p.Arg335Trp Pathogenic/Likely pathogenic ★★ same condition
STAT3 p.Arg382Gln Pathogenic ★★ same condition
STAT3 p.Arg382Trp Pathogenic ★★ same condition
STAT3 p.Arg423Gln Pathogenic ★★ ⚠ same condition
STAT3 p.Asn466Ser Pathogenic ★★ ⚠ same condition
STAT3 p.Asn466Thr Pathogenic/Likely 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/stat3-p-ser381 (accessed [today's date]).

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