2-232533949-C-T

Position:

chr2-232533949-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_ModerateBS2

The NM_000751.3(CHRND):c.1066C>T(p.Pro356Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000596 in 1,612,914 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P356L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00035 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00062 ( 2 hom. )

Consequence

CHRND
NM_000751.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 7.84

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 -2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.912

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.1066C>T	p.Pro356Ser	missense_variant	10/12	ENST00000258385.8
CHRND	NM_001256657.2 linkuse as main transcript	c.1021C>T	p.Pro341Ser	missense_variant	9/11
CHRND	NM_001311196.2 linkuse as main transcript	c.763C>T	p.Pro255Ser	missense_variant	10/12
CHRND	NM_001311195.2 linkuse as main transcript	c.484C>T	p.Pro162Ser	missense_variant	8/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHRND	ENST00000258385.8 linkuse as main transcript	c.1066C>T	p.Pro356Ser	missense_variant	10/12	1	NM_000751.3	P1	Q07001-1
CHRND	ENST00000543200.5 linkuse as main transcript	c.1021C>T	p.Pro341Ser	missense_variant	9/11	2			Q07001-2
CHRND	ENST00000441621.6 linkuse as main transcript	c.*248C>T		3_prime_UTR_variant, NMD_transcript_variant	9/11	5
CHRND	ENST00000446616.1 linkuse as main transcript	c.*707C>T		3_prime_UTR_variant, NMD_transcript_variant	10/12	3

Frequencies

GnomAD3 genomes

AF:

0.000355

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000436

AC:

109

AN:

250238

Hom.:

AF XY:

0.000406

AC XY:

AN XY:

135552

show subpopulations

Gnomad AFR exome

AF:

0.000188

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000231

Gnomad NFE exome

AF:

0.000823

Gnomad OTH exome

AF:

0.000491

GnomAD4 exome

AF:

0.000622

AC:

908

AN:

1460570

Hom.:

Cov.:

AF XY:

0.000600

AC XY:

436

AN XY:

726632

show subpopulations

Gnomad4 AFR exome

AF:

0.000120

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000283

Gnomad4 NFE exome

AF:

0.000751

Gnomad4 OTH exome

AF:

0.000746

GnomAD4 genome

AF:

0.000354

AC:

AN:

152344

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74488

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000188

Gnomad4 NFE

AF:

0.000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000493

Hom.:

Bravo

AF:

0.000472

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000502

AC:

EpiCase

AF:

0.000654

EpiControl

AF:

0.000711

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Dec 14, 2022	- -
Uncertain significance, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Mar 21, 2016	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 17, 2021

The c.1066C>T (p.P356S) alteration is located in exon 10 (coding exon 10) of the CHRND gene. This alteration results from a C to T substitution at nucleotide position 1066, causing the proline (P) at amino acid position 356 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Lethal multiple pterygium syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 08, 2023

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 356 of the CHRND protein (p.Pro356Ser). This variant is present in population databases (rs147050939, gnomAD 0.08%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with CHRND-related conditions. ClinVar contains an entry for this variant (Variation ID: 286381). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CHRND protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.70

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Pathogenic

0.33

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.76

.;D

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

0.98

D;D

M_CAP

Uncertain

0.21

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Pathogenic

0.87

MutationAssessor

Pathogenic

3.6

.;H

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.51

PROVEAN

Pathogenic

-7.8

D;D

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.84

MVP

1.0

MPC

0.89

ClinPred

0.89

GERP RS

5.7

Varity_R

0.94

gMVP

0.80

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