4-186078952-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_003265.3(TLR3):c.554C>T(p.Ala185Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000917 in 1,613,448 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. A185A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00047 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

TLR3
NM_003265.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.0280

Publications

1 publications found

Variant links:

Genes affected

TLR3 (HGNC:11849): (toll like receptor 3) The protein encoded by this gene is a member of the Toll-like receptor (TLR) family which plays a fundamental role in pathogen recognition and activation of innate immunity. TLRs are highly conserved from Drosophila to humans and share structural and functional similarities. They recognize pathogen-associated molecular patterns (PAMPs) that are expressed on infectious agents, and mediate the production of cytokines necessary for the development of effective immunity. The various TLRs exhibit different patterns of expression. This receptor is most abundantly expressed in placenta and pancreas, and is restricted to the dendritic subpopulation of the leukocytes. It recognizes dsRNA associated with viral infection, and induces the activation of NF-kappaB and the production of type I interferons. It thus plays a role in host defense against multiple viruses. [provided by RefSeq, Jul 2021]

TLR3 Gene-Disease associations (from GenCC):

immunodeficiency 83, susceptibility to viral infections
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

TLR3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0096205175).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TLR3	NM_003265.3 link	c.554C>T	p.Ala185Val	missense_variant	Exon 3 of 5	ENST00000296795.8	NP_003256.1	O15455-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TLR3	ENST00000296795.8 link	c.554C>T	p.Ala185Val	missense_variant	Exon 3 of 5	1	NM_003265.3	ENSP00000296795.3		O15455-1

Frequencies

GnomAD3 genomes

AF:

0.000467

AC:

AN:

152004

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00150

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000386

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000136

AC:

AN:

250244

AF XY:

0.0000960

show subpopulations

Gnomad AFR exome

AF:

0.00169

Gnomad AMR exome

AF:

0.0000872

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000527

AC:

AN:

1461326

Hom.:

Cov.:

AF XY:

0.0000385

AC XY:

AN XY:

726930

show subpopulations

African (AFR)

AF:

0.00153

AC:

AN:

33420

American (AMR)

AF:

0.0000673

AC:

AN:

44604

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.000101

AC:

AN:

39670

South Asian (SAS)

AF:

0.00

AC:

AN:

86086

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1111886

Other (OTH)

AF:

0.0000994

AC:

AN:

60364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.462

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000467

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74358

show subpopulations

African (AFR)

AF:

0.00149

AC:

AN:

41524

American (AMR)

AF:

0.000327

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000387

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10560

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67990

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000266

Hom.:

Bravo

AF:

0.000559

ESP6500AA

AF:

0.00136

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000148

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Herpes simplex encephalitis, susceptibility to, 1

Uncertain:1

Dec 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 185 of the TLR3 protein (p.Ala185Val). This variant is present in population databases (rs35140061, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with TLR3-related conditions. ClinVar contains an entry for this variant (Variation ID: 570922). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The valine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Susceptibility to HIV infection;C2751803:Immunodeficiency 83, susceptibility to viral infections

Uncertain:1

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant has not been reported in the literature but is present in the Genome Aggregation Database (Highest reported MAF 0.1% (62/41402) (https://gnomad.broadinstitute.org/variant/4-186078952-C-T?dataset=gnomad_r3). This variant is present in ClinVar (Variation ID:570922). This variant amino acid Valine (Val) is present in several species including multiple mammals and is not well conserved among evolutionarily distant species; this suggests that this variant may not impact the protein. Additional computational prediction tools do not suggest an impact. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.45

CADD

Benign

2.8

(source)

DANN

Benign

0.73

DEOGEN2

Benign

0.062

T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.038

LIST_S2

Benign

0.55

T;T

M_CAP

Benign

0.017

MetaRNN

Benign

0.0096

T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

-0.53

N;.

PhyloP100

0.028

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.24

N;N

REVEL

Benign

0.044

Sift

Benign

0.43

T;T

Sift4G

Benign

0.32

T;T

Polyphen

0.010

B;.

Vest4

0.064

MVP

0.70

MPC

0.13

ClinPred

0.0047

GERP RS

-0.82

Varity_R

0.048

gMVP

0.18

Mutation Taster

=93/7

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over