rs1555563717

Positions:

• chr17-42322407-A-T

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Very_Strong

The NM_139276.3(STAT3):​c.1976T>A​(p.Ile659Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: STAT3 NM_139276.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 9.32

Genes affected

STAT3 (HGNC:11364): (signal transducer and activator of transcription 3) The protein encoded by this gene is a member of the STAT protein family. In response to cytokines and growth factors, STAT family members are phosphorylated by the receptor associated kinases, and then form homo- or heterodimers that translocate to the cell nucleus where they act as transcription activators. This protein is activated through phosphorylation in response to various cytokines and growth factors including IFNs, EGF, IL5, IL6, HGF, LIF and BMP2. This protein mediates the expression of a variety of genes in response to cell stimuli, and thus plays a key role in many cellular processes such as cell growth and apoptosis. The small GTPase Rac1 has been shown to bind and regulate the activity of this protein. PIAS3 protein is a specific inhibitor of this protein. This gene also plays a role in regulating host response to viral and bacterial infections. Mutations in this gene are associated with infantile-onset multisystem autoimmune disease and hyper-immunoglobulin E syndrome. [provided by RefSeq, Aug 2020]

ACMG classification

Verdict is Pathogenic. Variant got 15 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_139276.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, STAT3
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.885
• PP5: Variant 17-42322407-A-T is Pathogenic according to our data. Variant chr17-42322407-A-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 495061.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STAT3	NM_139276.3	c.1976T>A	p.Ile659Asn	missense_variant	21/24	ENST00000264657.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STAT3	ENST00000264657.10	c.1976T>A	p.Ile659Asn	missense_variant	21/24	1	NM_139276.3	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

STAT3 gain of function;CN031130:Hyper-IgE recurrent infection syndrome 1, autosomal dominant Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Jun 27, 2022

For these reasons, this variant has been classified as Pathogenic. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt STAT3 protein function. ClinVar contains an entry for this variant (Variation ID: 495061). This missense change has been observed in individual(s) with clinical features of hyper IgE syndrome (Invitae). In at least one individual the variant was observed to be de novo. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces isoleucine, which is neutral and non-polar, with asparagine, which is neutral and polar, at codon 659 of the STAT3 protein (p.Ile659Asn). -

Hyper-IgE recurrent infection syndrome 1, autosomal dominant Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Center of Genomic medicine, Geneva, University Hospital of Geneva

Sep 25, 2017

This missense variant in the STAT3 gene was identified in twin sisters with suspicion of Job syndrome, with multiple infections and pansynostosis. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	33
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.96	D;.;D;D;.
Eigen	Pathogenic	0.69
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Pathogenic	0.45	D
MetaRNN	Pathogenic	0.88	D;D;D;D;D
MetaSVM	Uncertain	0.73	D
MutationAssessor	Benign	1.4	L;L;.;L;L
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.95	D
PROVEAN	Pathogenic	-5.5	D;.;D;.;D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;.;D;.;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D
Polyphen		0.99	D;.;.;D;D
Vest4		0.87
MutPred		0.57		Loss of catalytic residue at I659 (P = 0.0286);Loss of catalytic residue at I659 (P = 0.0286);.;Loss of catalytic residue at I659 (P = 0.0286);Loss of catalytic residue at I659 (P = 0.0286);
MVP		0.98
MPC		3.3
ClinPred		1.0	D
GERP RS		4.5
Varity_R		0.95
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1555563717; hg19: chr17-40474425;