NM_015295.3:c.2637A>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_015295.3(SMCHD1):c.2637A>C(p.Lys879Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,588,792 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K879E) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

SMCHD1
NM_015295.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 1.03

Publications

35 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: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), Illumina, PanelApp Australia, G2P
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 -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.041606873).

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000329 (5/152014) while in subpopulation SAS AF = 0.00104 (5/4822). AF 95% confidence interval is 0.000408. There are 0 homozygotes in GnomAd4. There are 4 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 5 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015295.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMCHD1	NM_015295.3	MANE Select	c.2637A>C	p.Lys879Asn	missense	Exon 21 of 48	NP_056110.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SMCHD1	ENST00000320876.11	TSL:5 MANE Select	c.2637A>C	p.Lys879Asn	missense	Exon 21 of 48	ENSP00000326603.7	A6NHR9-1
SMCHD1	ENST00000939310.1		c.2550A>C	p.Lys850Asn	missense	Exon 21 of 48	ENSP00000609369.1
SMCHD1	ENST00000688342.1		c.2637A>C	p.Lys879Asn	missense	Exon 21 of 47	ENSP00000508422.1	A0A8I5KRS9

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

151896

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000617

AC:

AN:

226952

AF XY:

0.0000817

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000390

AC:

AN:

1436778

Hom.:

Cov.:

AF XY:

0.0000575

AC XY:

AN XY:

713346

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33220

American (AMR)

AF:

0.00

AC:

AN:

42594

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25546

East Asian (EAS)

AF:

0.00

AC:

AN:

39294

South Asian (SAS)

AF:

0.000628

AC:

AN:

82768

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51910

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5700

European-Non Finnish (NFE)

AF:

9.12e-7

AC:

AN:

1096496

Other (OTH)

AF:

0.0000338

AC:

AN:

59250

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<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:

0.0000329

AC:

AN:

152014

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74304

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41544

American (AMR)

AF:

0.00

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00104

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67862

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<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:

0.00

Hom.:

9480

ExAC

AF:

0.0000748

AC:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Facioscapulohumeral muscular dystrophy 2 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.51

BayesDel_noAF

Benign

-0.63

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.086

Eigen

Benign

-0.38

Eigen_PC

Benign

-0.21

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.53

M_CAP

Benign

0.0053

MetaRNN

Benign

0.042

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

PhyloP100

1.0

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.65

REVEL

Benign

0.099

Sift

Benign

0.34

Sift4G

Benign

0.22

Polyphen

0.0

Vest4

0.040

MutPred

0.11

Loss of methylation at K879 (P = 0.0135)

MVP

0.068

MPC

0.25

ClinPred

0.046

GERP RS

3.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.069

gMVP

0.37

Mutation Taster

=97/3

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over