Is STAT5B p.Arg107Cys (c.319C>T) pathogenic?

STAT5B p.Arg107Cys (c.319C>T) is classified Uncertain significance in STAT5B (ClinVar, Single submitter, 1 submitter; last evaluated 2018-11-06). AlphaMissense: ambiguous (0.4187); Very rare (popmax 0.00134%, afr); Associated with growth hormone insensitivity with immune dysregulation 1, autosomal recessive.

What condition is associated with STAT5B p.Arg107Cys (c.319C>T)?

STAT5B p.Arg107Cys (c.319C>T) is associated with growth hormone insensitivity with immune dysregulation 1, autosomal recessive (ClinVar).

How common is STAT5B p.Arg107Cys (c.319C>T) in the general population?

STAT5B p.Arg107Cys (c.319C>T) is very rare (popmax 0.00134%, afr) (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.Arg107Cys (c.319C>T)?

AlphaMissense predicts ambiguous (score 0.4187) — an in-silico prediction, not a clinical call.

STAT5B p.Arg107Cys

c.319C>T · rs1177773526 · VCV534576

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4187 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00134%, afr)

Conditions

growth hormone insensitivity with immune dysregulation 1, autosomal recessive

Computational evidence

Protein change
AlphaMissense	0.4187	ambiguous
REVEL	0.495	indeterminate
SaProt	LLR -12.40	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.7, phastCons 1
Regional constraint	o/e 0.57	unconstrained · MANE · 7,329 bp · p 2.5e-07 · regional, not allelic
Overall
CADD	33.0	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00134% African / African-American · 1/74,794 alleles

Filtering AF 0.000247% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000159%

Overall 0.000496% 8/1,613,552 alleles · very rare exomes 6/1,461,624 · genomes 2/151,928 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00134%	74,794
European (non-Finnish)	0.000593%	168,546

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.Arg107Cys
Coding: c.319C>T
MANE Select: NM_012448
dbSNP: rs1177773526
Type: single nucleotide variant
Location: chr17:42224835 (GRCh38)
Gene constraint: LOEUF 0.277 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 85.90 · 2 PDB

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.Arg107His 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-arg107cys (accessed [today's date]).

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