Is STAT5B p.Arg673Gln (c.2018G>A) pathogenic?

STAT5B p.Arg673Gln (c.2018G>A) is classified Uncertain significance in STAT5B (ClinVar, Single submitter, 1 submitter; last evaluated 2025-05-19). AlphaMissense: likely benign (0.0924); Very rare (popmax 0.00334%, amr); Associated with growth hormone insensitivity with immune dysregulation 1, autosomal recessive.

What condition is associated with STAT5B p.Arg673Gln (c.2018G>A)?

STAT5B p.Arg673Gln (c.2018G>A) is associated with growth hormone insensitivity with immune dysregulation 1, autosomal recessive (ClinVar).

How common is STAT5B p.Arg673Gln (c.2018G>A) in the general population?

STAT5B p.Arg673Gln (c.2018G>A) is very rare (popmax 0.00334%, amr) (gnomAD).

How is Laron syndrome with immunodeficiency inherited?

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

What do computational predictors say about STAT5B p.Arg673Gln (c.2018G>A)?

AlphaMissense predicts likely benign (score 0.0924) — an in-silico prediction, not a clinical call.

STAT5B p.Arg673Gln

c.2018G>A · rs776285574 · VCV575338

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0924 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00334%, amr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

growth hormone insensitivity with immune dysregulation 1, autosomal recessive

Computational evidence

Protein change
AlphaMissense	0.0924	likely benign
REVEL	0.538	indeterminate
SaProt	LLR -8.06	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2.1, phastCons 1
Regional constraint	o/e 0.48	unconstrained · MANE · 7,379 bp · p 3.2e-06 · regional, not allelic
Overall
CADD	26.7	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00334% Admixed American · 2/59,954 alleles

Filtering AF 0.000553% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000207%

Overall 0.00031% 5/1,613,814 alleles · very rare exomes 3/1,461,892 · genomes 2/151,922 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00334%	29,977
South Asian	0.0022%	45,539
European (non-Finnish)	8.47e-05%	1,180,026

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: STAT5B
Protein: p.Arg673Gln
Coding: c.2018G>A
MANE Select: NM_012448
dbSNP: rs776285574
Type: single nucleotide variant
Location: chr17:42207617 (GRCh38)
Gene constraint: LOEUF 0.277 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 85.90 · 2 PDB
Residue 673: the sh2 domain

Full STAT5B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

growth hormone insensitivity with immune dysregulation 1, autosomal recessive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Laron syndrome with immunodeficiency (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: Childhood, Infancy, Neonatal

Similar variants

STAT5B p.Arg673Trp Uncertain significance ★ ⚠ same residue
STAT5B c.1906+1G>A Likely pathogenic ★★ same condition
STAT5B p.Ala20Glu Uncertain significance ★★ ⚠ same condition
STAT5B p.Ala20Val Uncertain significance ★★ ⚠ same condition
STAT5B p.Ala213Gly Uncertain significance ★★ ⚠ same condition
STAT5B p.Ala213Ser Uncertain significance ★★ ⚠ same condition
STAT5B p.Ala723Thr Uncertain significance ★★ ⚠ same condition
STAT5B p.Ala785Thr Uncertain significance ★★ ⚠ 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/stat5b-p-arg673gln (accessed [today's date]).

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