chr4-38797918-T-C

Variant names:

• chr4-38797918-T-C
• rs3923647
• NM_003263.4:c.914A>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003263.4(TLR1):​c.914A>G​(p.His305Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,832 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H305L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: TLR1 NM_003263.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.91

Genes affected

TLR1 (HGNC:11847): (toll like receptor 1) 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 ubiquitously expressed, and at higher levels than other TLR genes. Different length transcripts presumably resulting from use of alternative polyadenylation site, and/or from alternative splicing, have been noted for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.102143645).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TLR1	NM_003263.4	c.914A>G	p.His305Arg	missense_variant	Exon 4 of 4	ENST00000308979.7	NP_003254.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TLR1	ENST00000308979.7	c.914A>G	p.His305Arg	missense_variant	Exon 4 of 4	1	NM_003263.4	ENSP00000354932.2
TLR1	ENST00000502213.6	c.914A>G	p.His305Arg	missense_variant	Exon 3 of 3	1		ENSP00000421259.1
TLR1	ENST00000505744.5	n.235+2939A>G		intron_variant	Intron 3 of 3	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250542 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135576

Gnomad AFR exome AF: 0.00

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: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461832 Hom.: 0 Cov.: 36 AF XY: 0.00000138 AC XY: 1 AN XY: 727204

Gnomad4 AFR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.067
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	14
DANN	Benign	0.97
DEOGEN2	Benign	0.041	T;T
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.77	T;.
M_CAP	Benign	0.0046	T
MetaRNN	Benign	0.10	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L;L
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.22	N;N
REVEL	Benign	0.14
Sift	Uncertain	0.0070	D;D
Sift4G	Benign	0.21	T;T
Polyphen		0.0010	B;B
Vest4		0.16
MutPred		0.49		Gain of loop (P = 0.069);Gain of loop (P = 0.069);
MVP		0.44
MPC		0.075
ClinPred		0.15	T
GERP RS		4.8
Varity_R		0.14
gMVP		0.33

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: rs3923647; hg19: chr4-38799539;