rs869312889

chr17-42322395-G-Achr17-42322395-G-Cchr17-42322395-G-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.1988C>T(p.Thr663Ile) variant causes a missense change. 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T663L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: STAT3 NM_139276.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.67

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, 0.843
• PP5: Variant 17-42322395-G-A is Pathogenic according to our data. Variant chr17-42322395-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 224845.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.1988C>T	p.Thr663Ile	missense_variant	21/24	ENST00000264657.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STAT3	ENST00000264657.10	c.1988C>T	p.Thr663Ile	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:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

STAT3-related early-onset multisystem autoimmune disease Pathogenic:2

Pathogenic, criteria provided, single submitter	research	Lupski Lab, Baylor-Hopkins CMG, Baylor College of Medicine	Oct 30, 2014	segregates with the phenotype in an affected family -
Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 15, 2016	- -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Blueprint Genetics

Jun 07, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.070
Cadd	Pathogenic	32
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.79	D;.;D;D;.
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Uncertain	0.27	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Benign	0.55	N;N;.;N;N
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Benign	-2.1	N;.;N;.;N
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0030	D;.;D;.;D
Sift4G	Benign	0.11	T;T;T;T;T
Polyphen		1.0	D;.;.;D;D
Vest4		0.81
MutPred		0.67		Loss of catalytic residue at T663 (P = 0.0571);Loss of catalytic residue at T663 (P = 0.0571);.;Loss of catalytic residue at T663 (P = 0.0571);Loss of catalytic residue at T663 (P = 0.0571);
MVP		0.85
MPC		2.3
ClinPred		0.93	D
GERP RS		4.5
Varity_R		0.47
gMVP		0.80

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs869312889; hg19: chr17-40474413;