1-154569502-T-A

Position:

chr1-154569502-T-A

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4BP6_Very_StrongBS1BS2

The NM_000748.3(CHRNB2):c.105T>A(p.His35Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000167 in 1,613,672 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

CHRNB2
NM_000748.3 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.245

Variant links:

Genes affected

CHRNB2 (HGNC:1962): (cholinergic receptor nicotinic beta 2 subunit) Neuronal acetylcholine receptors are homo- or heteropentameric complexes composed of homologous alpha and beta subunits. They belong to a superfamily of ligand-gated ion channels which allow the flow of sodium and potassium across the plasma membrane in response to ligands such as acetylcholine and nicotine. This gene encodes one of several beta subunits. Mutations in this gene are associated with autosomal dominant nocturnal frontal lobe epilepsy. [provided by RefSeq, Jul 2008]

CHRNB2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -17 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.3006154).

BP6

Variant 1-154569502-T-A is Benign according to our data. Variant chr1-154569502-T-A is described in ClinVar as [Likely_benign]. Clinvar id is 429855.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.0000157 (23/1461696) while in subpopulation AMR AF= 0.000492 (22/44706). AF 95% confidence interval is 0.000333. There are 0 homozygotes in gnomad4_exome. There are 10 alleles in male gnomad4_exome subpopulation. Median coverage is 34. This position pass quality control queck.

BS2

High AC in GnomAdExome4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHRNB2	NM_000748.3 linkuse as main transcript	c.105T>A	p.His35Gln	missense_variant	2/6	ENST00000368476.4	NP_000739.1
CHRNB2	XR_001736952.3 linkuse as main transcript	n.372T>A		non_coding_transcript_exon_variant	2/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
CHRNB2	ENST00000368476.4 linkuse as main transcript	c.105T>A	p.His35Gln	missense_variant	2/6	1	NM_000748.3	ENSP00000357461	P4
CHRNB2	ENST00000637900.1 linkuse as main transcript	c.105T>A	p.His35Gln	missense_variant	2/6	5		ENSP00000490474	A1
CHRNB2	ENST00000636034.1 linkuse as main transcript	c.105T>A	p.His35Gln	missense_variant, NMD_transcript_variant	2/9	5		ENSP00000489703
CHRNB2	ENST00000636695.1 linkuse as main transcript			upstream_gene_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

151976

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000878

AC:

AN:

250606

Hom.:

AF XY:

0.0000590

AC XY:

AN XY:

135578

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000609

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:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461696

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727140

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000492

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:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

151976

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74208

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Autosomal dominant nocturnal frontal lobe epilepsy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 16, 2024

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 12, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

May 07, 2021

This variant is associated with the following publications: (PMID: 21703448) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Uncertain

-0.030

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.39

T;.

Eigen

Uncertain

0.25

Eigen_PC

Uncertain

0.29

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.040

MetaRNN

Benign

0.30

T;T

MetaSVM

Benign

-0.37

MutationAssessor

Benign

1.9

L;.

MutationTaster

Benign

1.0

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.1

N;.

REVEL

Uncertain

0.55

Sift

Benign

0.068

T;.

Sift4G

Benign

0.16

T;.

Polyphen

0.76

P;.

Vest4

0.42

MutPred

0.47

Loss of stability (P = 0.1016);Loss of stability (P = 0.1016);

MVP

0.93

MPC

1.7

ClinPred

0.15

GERP RS

4.8

Varity_R

0.31

gMVP

0.72

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over