2-232530136-G-A

Position:

chr2-232530136-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4BP6BS2

The NM_000751.3(CHRND):c.817G>A(p.Asp273Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000224 in 1,614,020 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00049 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 2 hom. )

Consequence

CHRND
NM_000751.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 2.79

Variant links:

Genes affected

CHRND (HGNC:1965): (cholinergic receptor nicotinic delta subunit) The acetylcholine receptor of muscle has 5 subunits of 4 different types: 2 alpha and 1 each of beta, gamma and delta subunits. After acetylcholine binding, the receptor undergoes an extensive conformation change that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane. Defects in this gene are a cause of multiple pterygium syndrome lethal type (MUPSL), congenital myasthenic syndrome slow-channel type (SCCMS), and congenital myasthenic syndrome fast-channel type (FCCMS). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2015]

CHRND links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.36395046).

BP6

Variant 2-232530136-G-A is Benign according to our data. Variant chr2-232530136-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 256781.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CHRND	NM_000751.3 linkuse as main transcript	c.817G>A	p.Asp273Asn	missense_variant	7/12	ENST00000258385.8
CHRND	NM_001256657.2 linkuse as main transcript	c.772G>A	p.Asp258Asn	missense_variant	6/11
CHRND	NM_001311196.2 linkuse as main transcript	c.514G>A	p.Asp172Asn	missense_variant	7/12
CHRND	NM_001311195.2 linkuse as main transcript	c.239-1216G>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHRND	ENST00000258385.8 linkuse as main transcript	c.817G>A	p.Asp273Asn	missense_variant	7/12	1	NM_000751.3	P1	Q07001-1

Frequencies

GnomAD3 genomes

AF:

0.000493

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00113

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000267

AC:

AN:

250804

Hom.:

AF XY:

0.000243

AC XY:

AN XY:

135614

show subpopulations

Gnomad AFR exome

AF:

0.000677

Gnomad AMR exome

AF:

0.000752

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000203

Gnomad OTH exome

AF:

0.000978

GnomAD4 exome

AF:

0.000196

AC:

287

AN:

1461766

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

147

AN XY:

727178

show subpopulations

Gnomad4 AFR exome

AF:

0.000956

Gnomad4 AMR exome

AF:

0.000715

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.000171

Gnomad4 OTH exome

AF:

0.000414

GnomAD4 genome

AF:

0.000486

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.000484

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00111

Gnomad4 AMR

AF:

0.000915

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000251

Hom.:

Bravo

AF:

0.000669

ESP6500AA

AF:

0.00204

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000181

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 24, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 16, 2019	This variant is associated with the following publications: (PMID: 28518170) -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	May 26, 2023	- -

Lethal multiple pterygium syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 13, 2023

- -

CHRND-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 17, 2019

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

Benign

0.27

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.23

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.75

.;D

Eigen

Uncertain

0.68

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.93

D;D

M_CAP

Benign

0.078

MetaRNN

Benign

0.36

T;T

MetaSVM

Uncertain

0.71

MutationAssessor

Uncertain

2.7

.;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.65

PROVEAN

Benign

-2.0

N;N

REVEL

Uncertain

0.51

Sift

Uncertain

0.029

D;D

Sift4G

Benign

0.066

T;T

Polyphen

1.0

.;D

Vest4

0.50

MVP

1.0

MPC

0.79

ClinPred

0.040

GERP RS

5.2

Varity_R

0.44

gMVP

0.66

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