7-17310004-C-T

Position:

• chr7-17310004-C-T

Variant summary

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

The NM_001621.5(AHR):​c.134C>T​(p.Thr45Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AHR NM_001621.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.26

Genes affected

AHR (HGNC:348): (aryl hydrocarbon receptor) The protein encoded by this gene is a ligand-activated helix-loop-helix transcription factor involved in the regulation of biological responses to planar aromatic hydrocarbons. This receptor has been shown to regulate xenobiotic-metabolizing enzymes such as cytochrome P450. Before ligand binding, the encoded protein is sequestered in the cytoplasm; upon ligand binding, this protein moves to the nucleus and stimulates transcription of target genes. [provided by RefSeq, Sep 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AHR	NM_001621.5	c.134C>T	p.Thr45Ile	missense_variant	2/11	ENST00000242057.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AHR	ENST00000242057.9	c.134C>T	p.Thr45Ile	missense_variant	2/11	1	NM_001621.5	P2
AHR	ENST00000463496.1	c.134C>T	p.Thr45Ile	missense_variant, NMD_transcript_variant	2/12	1
AHR	ENST00000642825.1	c.89C>T	p.Thr30Ile	missense_variant	6/15			A2

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

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 10, 2019

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 are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C15"). This variant has not been reported in the literature in individuals with AHR-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces threonine with isoleucine at codon 45 of the AHR protein (p.Thr45Ile). The threonine residue is moderately conserved and there is a moderate physicochemical difference between threonine and isoleucine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.51
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.0
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.61	.;D;.
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.86	D;.;D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.43	T;T;T
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.4	.;L;.
MutationTaster	Benign	0.93	D
PrimateAI	Uncertain	0.66	T
PROVEAN	Uncertain	-3.2	.;D;.
REVEL	Uncertain	0.47
Sift	Benign	0.058	.;T;.
Sift4G	Benign	0.17	.;T;.
Polyphen		0.96	.;D;.
Vest4		0.23
MutPred		0.37		.;Gain of catalytic residue at L50 (P = 0.0244);.;
MVP		0.58
MPC		0.44
ClinPred		0.97	D
GERP RS		5.5
Varity_R		0.32
gMVP		0.60

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: rs1782045920; hg19: chr7-17349628;