2-190995143-T-C

Position:

• chr2-190995143-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PM5 PP2 PP5_Moderate

The NM_007315.4(STAT1):​c.862A>G​(p.Thr288Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T288I) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 31)
• Consequence: STAT1 NM_007315.4 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 2.63

Genes affected

STAT1 (HGNC:11362): (signal transducer and activator of transcription 1) 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. The protein encoded by this gene can be activated by various ligands including interferon-alpha, interferon-gamma, EGF, PDGF and IL6. This protein mediates the expression of a variety of genes, which is thought to be important for cell viability in response to different cell stimuli and pathogens. The protein plays an important role in immune responses to viral, fungal and mycobacterial pathogens. Mutations in this gene are associated with Immunodeficiency 31B, 31A, and 31C. [provided by RefSeq, Jun 2020]

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a coiled_coil_region (size 181) in uniprot entity STAT1_HUMAN there are 33 pathogenic changes around while only 1 benign (97%) in NM_007315.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-190995142-G-A is described in Lovd as [Pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), STAT1. . Gene score misZ 5.1492 (greater than the threshold 3.09). Trascript score misZ 7.0181 (greater than threshold 3.09). GenCC has associacion of gene with Mendelian susceptibility to mycobacterial diseases due to partial STAT1 deficiency, autoimmune enteropathy and endocrinopathy - susceptibility to chronic infections syndrome, immunodeficiency 31B.
• PP5: Variant 2-190995143-T-C is Pathogenic according to our data. Variant chr2-190995143-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 30090.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr2-190995143-T-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STAT1	NM_007315.4	c.862A>G	p.Thr288Ala	missense_variant	10/25	ENST00000361099.8	NP_009330.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STAT1	ENST00000361099.8	c.862A>G	p.Thr288Ala	missense_variant	10/25	1	NM_007315.4	ENSP00000354394	P4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Autoimmune enteropathy and endocrinopathy - susceptibility to chronic infections syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 01, 2011

- -

Immunodeficiency 31B;C3279990:Autoimmune enteropathy and endocrinopathy - susceptibility to chronic infections syndrome;C4013950:Mendelian susceptibility to mycobacterial diseases due to partial STAT1 deficiency Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 19, 2022

For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Thr288 amino acid residue in STAT1. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 24188975, 27114460). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects STAT1 function (PMID: 21727188). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 30090). This missense change has been observed in individuals with chronic mucocutaneous candidiasis (PMID: 21727188, 31362757). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 288 of the STAT1 protein (p.Thr288Ala). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.081	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.93	D;D;.;.
Eigen	Benign	0.13
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.78	.;T;T;T
M_CAP	Uncertain	0.14	D
MetaRNN	Uncertain	0.61	D;D;D;D
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.8	M;M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-2.2	N;N;N;N
REVEL	Benign	0.22
Sift	Uncertain	0.0040	D;D;D;D
Sift4G	Uncertain	0.016	D;D;D;D
Polyphen		0.49	P;P;P;.
Vest4		0.51
MutPred		0.47		Loss of phosphorylation at T288 (P = 0.0341);Loss of phosphorylation at T288 (P = 0.0341);Loss of phosphorylation at T288 (P = 0.0341);.;
MVP		0.78
MPC		1.9
ClinPred		0.94	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.48
gMVP		0.88

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: rs387906765; hg19: chr2-191859869;