15-78601290-A-G

Position:

chr15-78601290-A-G

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 1P and 11B. PP3BP4BP6_ModerateBS1BS2

The NM_000743.5(CHRNA3):c.1352T>C(p.Ile451Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000248 in 1,614,076 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00027 ( 3 hom. )

Consequence

CHRNA3
NM_000743.5 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:2

Conservation

PhyloP100: 9.22

Variant links:

Genes affected

CHRNA3 (HGNC:1957): (cholinergic receptor nicotinic alpha 3 subunit) This locus encodes a member of the nicotinic acetylcholine receptor family of proteins. Members of this family of proteins form pentameric complexes comprised of both alpha and beta subunits. This locus encodes an alpha-type subunit, as it contains characteristic adjacent cysteine residues. The encoded protein is a ligand-gated ion channel that likely plays a role in neurotransmission. Polymorphisms in this gene have been associated with an increased risk of smoking initiation and an increased susceptibility to lung cancer. Alternatively spliced transcript variants have been described. [provided by RefSeq, Nov 2009]

CHRNA3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -10 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 9: AlphaMissense, BayesDel_addAF, BayesDel_noAF, Eigen, M_CAP, MutationAssessor, phyloP100way_vertebrate, PROVEAN, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.39375237).

BP6

Variant 15-78601290-A-G is Benign according to our data. Variant chr15-78601290-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 2182780.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0000591 (9/152236) while in subpopulation SAS AF= 0.00145 (7/4830). AF 95% confidence interval is 0.000679. There are 0 homozygotes in gnomad4. There are 9 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CHRNA3	NM_000743.5 linkuse as main transcript	c.1352T>C	p.Ile451Thr	missense_variant	5/6	ENST00000326828.6	NP_000734.2
CHRNA3	NM_001166694.2 linkuse as main transcript	c.1352T>C	p.Ile451Thr	missense_variant	5/6		NP_001160166.1
CHRNA3	XM_006720382.4 linkuse as main transcript	c.1151T>C	p.Ile384Thr	missense_variant	5/6		XP_006720445.1
CHRNA3	NR_046313.2 linkuse as main transcript	n.1554T>C		non_coding_transcript_exon_variant	5/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHRNA3	ENST00000326828.6 linkuse as main transcript	c.1352T>C	p.Ile451Thr	missense_variant	5/6	1	NM_000743.5	ENSP00000315602	P1	P32297-2
CHRNA3	ENST00000348639.7 linkuse as main transcript	c.1352T>C	p.Ile451Thr	missense_variant	5/6	1		ENSP00000267951		P32297-3
CHRNA3	ENST00000559658.5 linkuse as main transcript	c.1352T>C	p.Ile451Thr	missense_variant, NMD_transcript_variant	5/8	2		ENSP00000452896		P32297-2

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000458

AC:

115

AN:

251206

Hom.:

AF XY:

0.000670

AC XY:

AN XY:

135766

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00369

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000268

AC:

392

AN:

1461840

Hom.:

Cov.:

AF XY:

0.000380

AC XY:

276

AN XY:

727224

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00443

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000508

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.000453

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 13, 2022

- -

CHRNA3-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 06, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Pathogenic

0.47

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.91

.;D

Eigen

Pathogenic

0.99

Eigen_PC

Pathogenic

0.92

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.94

D;D

M_CAP

Pathogenic

0.46

MetaRNN

Benign

0.39

T;T

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.6

H;H

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-3.0

D;D

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.95

MutPred

0.84

Gain of disorder (P = 0.0216);Gain of disorder (P = 0.0216);

MVP

0.98

MPC

1.0

ClinPred

0.36

GERP RS

5.6

Varity_R

0.80

gMVP

0.78

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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