rs9961682

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_015295.3(SMCHD1):c.2878A>G(p.Ile960Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00587 in 1,613,044 control chromosomes in the GnomAD database, including 475 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar.

Frequency

Genomes: 𝑓 0.031 ( 244 hom., cov: 32)

Exomes 𝑓: 0.0032 ( 231 hom. )

Consequence

SMCHD1
NM_015295.3 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.0640

Publications

6 publications found

Variant links:

Genes affected

SMCHD1 (HGNC:29090): (structural maintenance of chromosomes flexible hinge domain containing 1) This gene encodes a protein which contains a hinge region domain found in members of the SMC (structural maintenance of chromosomes) protein family. [provided by RefSeq, Dec 2011]

SMCHD1 Gene-Disease associations (from GenCC):

arhinia, choanal atresia, and microphthalmia
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P, Ambry Genetics, ClinGen, Illumina
facioscapulohumeral muscular dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hyposmia-nasal and ocular hypoplasia-hypogonadotropic hypogonadism syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SMCHD1 links:

ENSG00000266049 (HGNC:):

ENSG00000266049 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0013088584).

BP6

Variant 18-2728561-A-G is Benign according to our data. Variant chr18-2728561-A-G is described in ClinVar as Benign. ClinVar VariationId is 260641.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.105 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMCHD1	NM_015295.3 link	c.2878A>G	p.Ile960Val	missense_variant	Exon 23 of 48	ENST00000320876.11	NP_056110.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMCHD1	ENST00000320876.11 link	c.2878A>G	p.Ile960Val	missense_variant	Exon 23 of 48	5	NM_015295.3	ENSP00000326603.7		A6NHR9-1

Frequencies

GnomAD3 genomes

AF:

0.0311

AC:

4731

AN:

152112

Hom.:

243

Cov.:

show subpopulations

Gnomad AFR

AF:

0.107

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0119

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000576

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000647

Gnomad OTH

AF:

0.0239

GnomAD2 exomes

AF:

0.00777

AC:

1929

AN:

248322

AF XY:

0.00606

show subpopulations

Gnomad AFR exome

AF:

0.108

Gnomad AMR exome

AF:

0.00463

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000489

Gnomad OTH exome

AF:

0.00514

GnomAD4 exome

AF:

0.00324

AC:

4728

AN:

1460816

Hom.:

231

Cov.:

AF XY:

0.00281

AC XY:

2043

AN XY:

726690

show subpopulations

African (AFR)

AF:

0.113

AC:

3765

AN:

33440

American (AMR)

AF:

0.00531

AC:

237

AN:

44634

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39598

South Asian (SAS)

AF:

0.000314

AC:

AN:

86118

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53338

Middle Eastern (MID)

AF:

0.00573

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.000221

AC:

246

AN:

1111474

Other (OTH)

AF:

0.00696

AC:

420

AN:

60338

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.462

Heterozygous variant carriers

210

419

629

838

1048

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

220

330

440

550

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0311

AC:

4737

AN:

152228

Hom.:

244

Cov.:

AF XY:

0.0305

AC XY:

2270

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.107

AC:

4455

AN:

41516

American (AMR)

AF:

0.0119

AC:

182

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000578

AC:

AN:

5192

South Asian (SAS)

AF:

0.000622

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000647

AC:

AN:

67992

Other (OTH)

AF:

0.0237

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

216

431

647

862

1078

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

144

192

240

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0118

Hom.:

219

Bravo

AF:

0.0353

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.110

AC:

409

ESP6500EA

AF:

0.000854

AC:

ExAC

AF:

0.00944

AC:

1140

Asia WGS

AF:

0.00404

AC:

AN:

3476

EpiCase

AF:

0.000273

EpiControl

AF:

0.000593

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 16, 2023

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Apr 15, 2021

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Facioscapulohumeral muscular dystrophy 2

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.065

BayesDel_addAF

Benign

-0.70

BayesDel_noAF

Benign

-0.69

CADD

Benign

6.1

(source)

DANN

Benign

0.80

DEOGEN2

Benign

0.079

Eigen

Benign

-0.74

Eigen_PC

Benign

-0.63

FATHMM_MKL

Benign

0.42

LIST_S2

Benign

0.60

MetaRNN

Benign

0.0013

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.5

PhyloP100

-0.064

PrimateAI

Benign

0.31

PROVEAN

Benign

-0.20

REVEL

Benign

0.13

Sift

Benign

0.30

Sift4G

Benign

0.68

Polyphen

0.0

Vest4

0.13

MVP

0.043

MPC

0.18

ClinPred

0.0011

GERP RS

-3.5

Varity_R

0.018

gMVP

0.15

Mutation Taster

=98/2

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over