Variant 2-174754233-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PM5PP3

The NM_000079.4(CHRNA1):c.526G>C(p.Val176Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,224 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. V176M) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CHRNA1
NM_000079.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.87

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:

(HGNC:):

links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. 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

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr2-174754233-C-T is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.809

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CHRNA1	NM_000079.4 linkuse as main transcript	c.526G>C	p.Val176Leu	missense_variant	5/9	ENST00000348749.9	NP_000070.1
CHRNA1	NM_001039523.3 linkuse as main transcript	c.601G>C	p.Val201Leu	missense_variant	6/10		NP_001034612.1
CHRNA1	XM_017003256.2 linkuse as main transcript	c.622G>C	p.Val208Leu	missense_variant	5/9		XP_016858745.1
CHRNA1	XM_017003257.2 linkuse as main transcript	c.547G>C	p.Val183Leu	missense_variant	4/8		XP_016858746.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHRNA1	ENST00000348749.9 linkuse as main transcript	c.526G>C	p.Val176Leu	missense_variant	5/9	1	NM_000079.4	ENSP00000261008	P1	P02708-2
	ENST00000442996.1 linkuse as main transcript	n.322-18516C>G		intron_variant, non_coding_transcript_variant		1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251334

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135828

show subpopulations

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:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461224

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726904

show subpopulations

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:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.60

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

0.020

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.40

.;T;T;T;T;.

Eigen

Benign

0.11

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.92

D;D;D;D;D;D

M_CAP

Benign

0.056

MetaRNN

Pathogenic

0.81

D;D;D;D;D;D

MetaSVM

Benign

-0.50

MutationAssessor

Benign

0.92

.;L;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-1.2

N;N;N;N;.;N

REVEL

Uncertain

0.41

Sift

Benign

0.13

T;T;T;T;.;T

Sift4G

Benign

0.28

T;T;T;T;.;T

Polyphen

0.22, 0.20

.;B;.;.;.;B

Vest4

0.69

MutPred

0.71

.;Gain of disorder (P = 0.2441);.;.;.;.;

MVP

0.82

MPC

0.33

ClinPred

0.47

GERP RS

5.8

Varity_R

0.64

gMVP

0.64

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over