12-56343408-A-C

Variant names:

• chr12-56343408-A-C
• NM_005419.4:c.2537T>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005419.4(STAT2):​c.2537T>G​(p.Leu846Trp) 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 benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. L846L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: STAT2 NM_005419.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.58
• Publications: 0 publications found

Genes affected

STAT2 (HGNC:11363): (signal transducer and activator of transcription 2) 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. In response to interferon (IFN), this protein forms a complex with STAT1 and IFN regulatory factor family protein p48 (ISGF3G), in which this protein acts as a transactivator, but lacks the ability to bind DNA directly. The protein mediates innate antiviral activity. Mutations in this gene result in Immunodeficiency 44. [provided by RefSeq, Aug 2020]

STAT2 Gene-Disease associations (from GenCC):

• primary immunodeficiency with post-measles-mumps-rubella vaccine viral infection

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P
• pseudo-TORCH syndrome 3

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13904792).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STAT2	NM_005419.4	c.2537T>G	p.Leu846Trp	missense_variant	Exon 24 of 24	ENST00000314128.9	NP_005410.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STAT2	ENST00000314128.9	c.2537T>G	p.Leu846Trp	missense_variant	Exon 24 of 24	1	NM_005419.4	ENSP00000315768.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Primary immunodeficiency with post-measles-mumps-rubella vaccine viral infection Uncertain:1

Feb 18, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The tryptophan amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. This variant has not been reported in the literature in individuals affected with STAT2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with tryptophan, which is neutral and slightly polar, at codon 846 of the STAT2 protein (p.Leu846Trp). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	21
DANN	Benign	0.89
DEOGEN2	Benign	0.099	T;.
Eigen	Benign	-0.45
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.52	D
LIST_S2	Benign	0.66	T;T
M_CAP	Benign	0.054	D
MetaRNN	Benign	0.14	T;T
MetaSVM	Benign	-0.33	T
MutationAssessor	Benign	1.4	L;.
PhyloP100		1.6
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.71	N;N
REVEL	Benign	0.26
Sift	Benign	0.084	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.029	B;.
Vest4		0.23
MutPred		0.43		Loss of glycosylation at T842 (P = 0.0988);.;
MVP		0.79
MPC		0.69
ClinPred		0.13	T
GERP RS		3.2
Varity_R		0.029
gMVP		0.33
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

hg19: chr12-56737192;