rs368979094

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM1BP4_StrongBP6BS1

The NM_000079.4(CHRNA1):c.64G>A(p.Glu22Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000254 in 1,613,558 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 Conflicting classifications of pathogenicity (no stars).

Frequency

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

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

CHRNA1
NM_000079.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 0.994

Variant links:

Genes affected

CHRNA1 (HGNC:1955): (cholinergic receptor nicotinic alpha 1 subunit) The muscle acetylcholine receptor consiststs of 5 subunits of 4 different types: 2 alpha subunits and 1 each of the beta, gamma, and delta subunits. This gene encodes an alpha subunit that plays a role in acetlycholine binding/channel gating. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Nov 2012]

CHRNA1 links:

ENSG00000236449 (HGNC:):

ENSG00000236449 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PM1

In a topological_domain Extracellular (size 211) in uniprot entity ACHA_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_000079.4

BP4

Computational evidence support a benign effect (MetaRNN=0.023479074).

BP6

Variant 2-174759613-C-T is Benign according to our data. Variant chr2-174759613-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 575740.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000592 (9/151980) while in subpopulation EAS AF= 0.00135 (7/5178). AF 95% confidence interval is 0.000634. There are 0 homozygotes in gnomad4. There are 6 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHRNA1	NM_000079.4 link	c.64G>A	p.Glu22Lys	missense_variant	Exon 2 of 9	ENST00000348749.9	NP_000070.1	P02708-2Q53SH4
CHRNA1	NM_001039523.3 link	c.64G>A	p.Glu22Lys	missense_variant	Exon 2 of 10		NP_001034612.1	P02708-1Q53SH4
CHRNA1	XM_017003256.2 link	c.85G>A	p.Glu29Lys	missense_variant	Exon 1 of 9		XP_016858745.1
CHRNA1	XM_017003257.2 link	c.85G>A	p.Glu29Lys	missense_variant	Exon 1 of 8		XP_016858746.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHRNA1	ENST00000348749.9 link	c.64G>A	p.Glu22Lys	missense_variant	Exon 2 of 9	1	NM_000079.4	ENSP00000261008.5		P02708-2

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

151980

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00135

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000131

AC:

AN:

251192

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

135778

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00152

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000219

AC:

AN:

1461578

Hom.:

Cov.:

AF XY:

0.0000234

AC XY:

AN XY:

727102

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.000453

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000809

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000592

AC:

AN:

151980

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74266

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00135

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000869

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000173

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Aug 05, 2019

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Lethal multiple pterygium syndrome

Benign:1

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.31

.;T;T;T;T;.

Eigen

Benign

-0.21

Eigen_PC

Benign

-0.051

FATHMM_MKL

Benign

0.29

LIST_S2

Uncertain

0.88

D;D;D;D;T;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.023

T;T;T;T;T;T

MetaSVM

Benign

-0.47

MutationAssessor

Benign

1.2

L;L;.;.;.;.

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.2

N;N;N;N;.;N

REVEL

Uncertain

0.32

Sift

Benign

0.31

T;T;D;T;.;T

Sift4G

Benign

0.38

T;T;T;T;.;T

Polyphen

0.027, 0.024

.;B;.;.;.;B

Vest4

0.27

MVP

0.75

MPC

0.29

ClinPred

0.087

GERP RS

6.0

Varity_R

0.29

gMVP

0.53

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