rs587777650

Positions:

• chr17-42322409-C-A
• chr17-42322409-C-G

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PS1 PM1 PM2 PM5 PP2 PP3_Moderate PP5_Moderate

The NM_139276.3(STAT3):​c.1974G>T​(p.Lys658Asn) variant causes a missense change involving the alteration of a non-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 (★). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K658R) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: STAT3 NM_139276.3 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.750

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.

• PS1: Transcript NM_139276.3 (STAT3) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 144032
• 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
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-42322410-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 973671.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP2: Missense variant where missense usually causes diseases, STAT3
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.848
• PP5: Variant 17-42322409-C-A is Pathogenic according to our data. Variant chr17-42322409-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 977089.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr17-42322409-C-A is described in UniProt as null. Variant chr17-42322409-C-A is described in UniProt as null. Variant chr17-42322409-C-A is described in UniProt as null. Variant chr17-42322409-C-A is described in UniProt as null.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STAT3	NM_139276.3	c.1974G>T	p.Lys658Asn	missense_variant	21/24	ENST00000264657.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STAT3	ENST00000264657.10	c.1974G>T	p.Lys658Asn	missense_variant	21/24	1	NM_139276.3	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

STAT3-related early-onset multisystem autoimmune disease Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Johns Hopkins Genomics, Johns Hopkins University

Jun 04, 2020

This STAT3 variant is absent from a large population dataset and has an entry in ClinVar. It has been reported in two unrelated patients with autosomal dominant infantile-onset multisystem autoimmune disease-1. Independent functional studies have shown that the p.Lys658Asn substitution confers hypersensitivity to interleukins resulting in persistent activation of STAT3 signaling in vitro. This variant is not predicted to affect normal exon 21 splicing, although this has not been confirmed experimentally to our knowledge. We consider c.1974G>T to be likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Uncertain	0.085	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D;.;D;D;.
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.93	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D
MetaSVM	Uncertain	0.27	D
MutationAssessor	Uncertain	2.5	M;M;.;M;M
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-2.7	D;.;D;.;D
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0020	D;.;D;.;D
Sift4G	Uncertain	0.034	D;D;D;D;D
Polyphen		0.99	D;.;.;D;D
Vest4		0.89
MutPred		0.53		Loss of ubiquitination at K658 (P = 0.0116);Loss of ubiquitination at K658 (P = 0.0116);.;Loss of ubiquitination at K658 (P = 0.0116);Loss of ubiquitination at K658 (P = 0.0116);
MVP		0.91
MPC		2.6
ClinPred		0.98	D
GERP RS		3.4
Varity_R		0.92
gMVP		0.95

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: rs587777650; hg19: chr17-40474427; COSMIC: COSV52886038; COSMIC: COSV52886038;