# NM_003151.4(STAT4):c.423G>A (p.Arg141=)

https://sugi.bio/variant/stat4-p-arg141

## Summary

**STAT4 p.Arg141= (c.423G>A)** is classified **Likely benign** in STAT4 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-15). Absent from gnomAD v4.1.

**At a glance:** Likely benign · review: Single submitter · rsID rs1034925771 · 1 submitter · absent from gnomAD v4.1

## For patients & families {#patients}

This is a change in the STAT4 gene that is classified as likely benign — not considered disease-causing, submitted by 1 submitter.

*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.*

**Support & next steps:** [Find a genetic counselor (NSGC)](https://findageneticcounselor.nsgc.org/).

## Identity {#identity}

| Field | Value |
| --- | --- |
| Gene | [STAT4](https://sugi.bio/atlas/gene/STAT4/) |
| Protein change (HGVS p.) | p.Arg141= |
| Coding change (HGVS c.) | c.423G>A |
| MANE Select transcript | [NM_003151](https://www.ncbi.nlm.nih.gov/nuccore/NM_003151) |
| dbSNP | [rs1034925771](https://www.ncbi.nlm.nih.gov/snp/rs1034925771/) |
| Variant type | single nucleotide variant |
| Location | chr2:191073140-191073140 (GRCh38) |
| ClinVar | [VCV1949658](https://www.ncbi.nlm.nih.gov/clinvar/variation/1949658/) |

**All HGVS expressions:** `NC_000002.11:g.191937866C>T`, `NC_000002.12:g.191073140C>T`, `NG_012852.2:g.178035G>A`, `NM_001243835.2:c.423G>A`, `NM_003151.4:c.423G>A`

## Computational & population evidence {#evidence}

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

- **Missense predictors (AlphaMissense/REVEL/SaProt) do not apply** to this variant type — they score amino-acid substitutions only. For non-missense variants the computational signal comes from conservation (below), not from a missing predictor score.
- Conservation: phyloP -0.187, GERP -3.64, phastCons 0.469 — not a conserved position (phyloP < 0.1, ACGS BP7 cut)
- CADD: **PHRED 7.796**. 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.*
- SpliceAI: **below the reporting threshold**. This position is scored for a different substitution (C>A, Δ0.31 donor loss), so this allele was evaluated and its deltas all fell under Δ0.2 — a prediction of no splicing effect for this allele, not a gap in our data. *No ACMG code assigned.*
- Population frequency: **absent from gnomAD v4.1** — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

*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}

**STAT4** population constraint: LOEUF 0.503, pLI 0.93457, missense-Z 3.2053. *Lower LOEUF and higher pLI indicate a gene that tolerates loss-of-function poorly; ClinGen dosage is the curated haploinsufficiency call.*

## Protein context {#protein}


AlphaFold model confidence (whole protein): pLDDT 86.87, 65% of residues very-high.

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

*Describes the biological roles of STAT4 (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:** STAT4's established molecular role includes DNA-binding transcription factor activity.


### Pathways affected {#pathways}

STAT4 participates in **7 Reactome pathways** (⚕ = disease pathway):

| Pathway (Reactome) | Evidence |
| --- | --- |
| [Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation](https://reactome.org/content/detail/R-HSA-8950505) | curated |
| [Interleukin-20 family signaling](https://reactome.org/content/detail/R-HSA-8854691) | curated |
| [Interleukin-21 signaling](https://reactome.org/content/detail/R-HSA-9020958) | curated |
| [Interleukin-23 signaling](https://reactome.org/content/detail/R-HSA-9020933) | curated |
| [Interleukin-35 Signalling](https://reactome.org/content/detail/R-HSA-8984722) | curated |
| [Differentiation of naive CD4+ T cells to T helper 1 cells (Th1 cells)](https://reactome.org/content/detail/R-HSA-9942503) | electronic |
| [Interleukin-12 signaling](https://reactome.org/content/detail/R-HSA-9020591) | electronic |

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

**Molecular function:** DNA-binding transcription factor activity, identical protein binding.

**Biological process:** interleukin-12-mediated signaling pathway, T-helper 1 cell differentiation, response to interleukin-6.

## Clinical significance {#significance}

**Likely benign** — review status Single submitter *(criteria provided, single submitter)*, last evaluated 2025-02-15.

**Submitter consensus:** unanimous (1/1 Likely benign).

### Submitter classifications {#submitters}

| Submitter | Classification | Review | Method | Date |
| --- | --- | --- | --- | --- |
| Labcorp Genetics (formerly Invitae), Labcorp | Likely benign | criteria provided, single submitter | clinical testing | 2025-02-15 |

**Reported phenotype names (ClinVar):** not provided, none provided.

## Similar variants {#similar}

Related STAT4 variant pages (same residue, condition, or type): [STAT4 p.Arg141Lys](/variant/stat4-p-arg141lys), [STAT4 p.Ala245Thr](/variant/stat4-p-ala245thr), [STAT4 p.Arg241Gln](/variant/stat4-p-arg241gln), [STAT4 p.Arg70Leu](/variant/stat4-p-arg70leu), [STAT4 p.Arg87Lys](/variant/stat4-p-arg87lys), [STAT4 p.Asp513Val](/variant/stat4-p-asp513val), [STAT4 p.Cys323Arg](/variant/stat4-p-cys323arg), [STAT4 p.Gln243Lys](/variant/stat4-p-gln243lys).

### Data sources & attribution {#sources}

ClinVar (NCBI — public domain, built 2026-10-14); 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 2026-10-14); 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 1949658). 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.*