11-62909824-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP2PP3BS2

The NM_000738.3(CHRM1):c.1277G>A(p.Arg426Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000109 in 1,461,888 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000011 ( 1 hom. )

Consequence

CHRM1
NM_000738.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.67

Variant links:

Genes affected

CHRM1 (HGNC:1950): (cholinergic receptor muscarinic 1) The muscarinic cholinergic receptors belong to a larger family of G protein-coupled receptors. The functional diversity of these receptors is defined by the binding of acetylcholine and includes cellular responses such as adenylate cyclase inhibition, phosphoinositide degeneration, and potassium channel mediation. Muscarinic receptors influence many effects of acetylcholine in the central and peripheral nervous system. The muscarinic cholinergic receptor 1 is involved in mediation of vagally-induced bronchoconstriction and in the acid secretion of the gastrointestinal tract. The gene encoding this receptor is localized to 11q13. [provided by RefSeq, Jul 2008]

CHRM1 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP2

Missense variant where missense usually causes diseases, CHRM1

PP3

MetaRNN computational evidence supports a deleterious effect, 0.827

BS2

High AC in GnomAdExome at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CHRM1	NM_000738.3 linkuse as main transcript	c.1277G>A	p.Arg426Gln	missense_variant	2/2	ENST00000306960.4
LOC124902683	XR_007062701.1 linkuse as main transcript	n.86+209C>T		intron_variant, non_coding_transcript_variant
CHRM1	XM_011544742.3 linkuse as main transcript	c.1277G>A	p.Arg426Gln	missense_variant	2/2
LOC124902683	XR_007062700.1 linkuse as main transcript	n.86+209C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHRM1	ENST00000306960.4 linkuse as main transcript	c.1277G>A	p.Arg426Gln	missense_variant	2/2	1	NM_000738.3	P1	P11229-1
	ENST00000543624.1 linkuse as main transcript	n.70+209C>T		intron_variant, non_coding_transcript_variant		3
CHRM1	ENST00000543973.1 linkuse as main transcript	c.1277G>A	p.Arg426Gln	missense_variant	3/3	5			P11229-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

251430

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135892

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:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000109

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000312

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 01, 2022

The c.1277G>A (p.R426Q) alteration is located in exon 2 (coding exon 1) of the CHRM1 gene. This alteration results from a G to A substitution at nucleotide position 1277, causing the arginine (R) at amino acid position 426 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.31

BayesDel_addAF

Uncertain

0.012

BayesDel_noAF

Benign

-0.11

Cadd

Uncertain

Dann

Pathogenic

1.0

DEOGEN2

Uncertain

0.51

D;.

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.11

FATHMM_MKL

Benign

0.41

LIST_S2

Uncertain

0.96

D;D

M_CAP

Benign

0.0074

MetaRNN

Pathogenic

0.83

D;D

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.5

L;L

MutationTaster

Benign

0.52

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.6

N;N

REVEL

Benign

0.27

Sift

Benign

0.096

T;T

Sift4G

Benign

0.077

T;.

Polyphen

0.45

B;.

Vest4

0.56

MutPred

0.86

Loss of MoRF binding (P = 0.0277);Loss of MoRF binding (P = 0.0277);

MVP

0.97

MPC

1.7

ClinPred

0.36

GERP RS

4.0

Varity_R

0.25

gMVP

0.99

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