chr4-186076690-C-T

Position:

• chr4-186076690-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The ENST00000296795.8(TLR3):​c.71C>T​(p.Ser24Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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. S24S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: TLR3 ENST00000296795.8 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.325

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.2114222).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TLR3	NM_003265.3	c.71C>T	p.Ser24Phe	missense_variant	2/5	ENST00000296795.8	NP_003256.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TLR3	ENST00000296795.8	c.71C>T	p.Ser24Phe	missense_variant	2/5	1	NM_003265.3	ENSP00000296795	P1
TLR3	ENST00000513189.1	c.71C>T	p.Ser24Phe	missense_variant	2/5	1		ENSP00000423386
TLR3	ENST00000698351.1	c.71C>T	p.Ser24Phe	missense_variant	2/5			ENSP00000513674
TLR3	ENST00000698352.1	c.71C>T	p.Ser24Phe	missense_variant, NMD_transcript_variant	2/5			ENSP00000513675

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000278 AC: 7 AN: 251428 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135880

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000202

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461888 Hom.: 0 Cov.: 32 AF XY: 0.00000413 AC XY: 3 AN XY: 727248

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000134

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Herpes simplex encephalitis, susceptibility to, 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 01, 2022

This variant is present in population databases (rs772953712, gnomAD 0.02%). This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 24 of the TLR3 protein (p.Ser24Phe). This variant has not been reported in the literature in individuals affected with TLR3-related conditions. 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 (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 647020). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	11
DANN	Uncertain	1.0
DEOGEN2	Benign	0.14	T;.
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.84	T;T
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.21	T;T
MetaSVM	Benign	-0.94	T
MutationAssessor	Uncertain	2.1	M;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.27	N;N
REVEL	Benign	0.21
Sift	Uncertain	0.0040	D;D
Sift4G	Benign	0.21	T;D
Polyphen		0.78	P;.
Vest4		0.20
MutPred		0.55		Loss of disorder (P = 0.0182);Loss of disorder (P = 0.0182);
MVP		0.77
MPC		0.15
ClinPred		0.20	T
GERP RS		5.6
Varity_R		0.095
gMVP		0.29

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: rs772953712; hg19: chr4-186997844;