X-12919114-G-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_138636.5(TLR8):c.74G>A(p.Cys25Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000455 in 1,209,984 control chromosomes in the GnomAD database, including 1 homozygotes. There are 17 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., 8 hem., cov: 23)

Exomes 𝑓: 0.000031 ( 1 hom. 9 hem. )

Consequence

TLR8
NM_138636.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.217

Variant links:

Genes affected

TLR8 (HGNC:15632): (toll like receptor 8) 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 gene is predominantly expressed in lung and peripheral blood leukocytes, and lies in close proximity to another family member, TLR7, on chromosome X. [provided by RefSeq, Jul 2008]

TLR8 links:

TLR8-AS1 (HGNC:):

TLR8-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.022986442).

BS2

High Hemizygotes in GnomAd at 8 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TLR8	NM_138636.5 linkuse as main transcript	c.74G>A	p.Cys25Tyr	missense_variant	2/2	ENST00000218032.7
TLR8-AS1	NR_030727.1 linkuse as main transcript	n.241-10781C>T		intron_variant, non_coding_transcript_variant
TLR8	NM_016610.4 linkuse as main transcript	c.128G>A	p.Cys43Tyr	missense_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TLR8	ENST00000218032.7 linkuse as main transcript	c.74G>A	p.Cys25Tyr	missense_variant	2/2	1	NM_138636.5	P2	Q9NR97-1
TLR8	ENST00000311912.5 linkuse as main transcript	c.128G>A	p.Cys43Tyr	missense_variant	3/3	1		A2	Q9NR97-2

Frequencies

GnomAD3 genomes

AF:

0.000188

AC:

AN:

111961

Hom.:

Cov.:

AF XY:

0.000234

AC XY:

AN XY:

34119

show subpopulations

Gnomad AFR

AF:

0.000618

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000950

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000492

AC:

AN:

182748

Hom.:

AF XY:

0.0000445

AC XY:

AN XY:

67366

show subpopulations

Gnomad AFR exome

AF:

0.000684

Gnomad AMR exome

AF:

0.00

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:

0.0000310

AC:

AN:

1098023

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

363387

show subpopulations

Gnomad4 AFR exome

AF:

0.00110

Gnomad4 AMR exome

AF:

0.00

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:

0.00000238

Gnomad4 OTH exome

AF:

0.0000651

GnomAD4 genome

AF:

0.000188

AC:

AN:

111961

Hom.:

Cov.:

AF XY:

0.000234

AC XY:

AN XY:

34119

show subpopulations

Gnomad4 AFR

AF:

0.000618

Gnomad4 AMR

AF:

0.0000950

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000188

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000260

Hom.:

Bravo

AF:

0.000253

ESP6500AA

AF:

0.000782

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 12, 2021

The c.74G>A (p.C25Y) alteration is located in exon 2 (coding exon 2) of the TLR8 gene. This alteration results from a G to A substitution at nucleotide position 74, causing the cysteine (C) at amino acid position 25 to be replaced by a tyrosine (Y). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.060

BayesDel_addAF

Benign

-0.69

BayesDel_noAF

Benign

-0.82

Cadd

Benign

0.40

Dann

Benign

0.30

DEOGEN2

Benign

0.11

T;.

FATHMM_MKL

Benign

0.081

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.0091

MetaRNN

Benign

0.023

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

N;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.26

PROVEAN

Benign

0.27

N;N

REVEL

Benign

0.021

Sift

Benign

0.32

T;T

Sift4G

Benign

0.12

T;T

Polyphen

0.0

B;.

Vest4

0.11

MVP

0.11

MPC

1.2

ClinPred

0.026

GERP RS

-0.66

Varity_R

0.047

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over