chr18-2656129-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_015295.3(SMCHD1):c.54G>C(p.Glu18Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000678 in 1,489,258 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000060 ( 1 hom. )

Consequence

SMCHD1
NM_015295.3 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.0800

Publications

1 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:

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=0.0044618547).

BP6

Variant 18-2656129-G-C is Benign according to our data. Variant chr18-2656129-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 499632.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000138 (21/152326) while in subpopulation EAS AF = 0.00367 (19/5174). AF 95% confidence interval is 0.0024. There are 0 homozygotes in GnomAd4. There are 5 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 21 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMCHD1	NM_015295.3 link	c.54G>C	p.Glu18Asp	missense_variant	Exon 1 of 48	ENST00000320876.11	NP_056110.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMCHD1	ENST00000320876.11 link	c.54G>C	p.Glu18Asp	missense_variant	Exon 1 of 48	5	NM_015295.3	ENSP00000326603.7	A6NHR9-1
SMCHD1	ENST00000688342.1 link	c.54G>C	p.Glu18Asp	missense_variant	Exon 1 of 47			ENSP00000508422.1	A0A8I5KRS9
SMCHD1	ENST00000684915.1 link	n.211G>C		non_coding_transcript_exon_variant	Exon 1 of 14

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00366

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000145

AC:

AN:

144594

AF XY:

0.000123

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000710

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00262

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000598

AC:

AN:

1336932

Hom.:

Cov.:

AF XY:

0.0000560

AC XY:

AN XY:

661216

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26718

American (AMR)

AF:

0.0000429

AC:

AN:

23334

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21572

East Asian (EAS)

AF:

0.00248

AC:

AN:

31450

South Asian (SAS)

AF:

0.00

AC:

AN:

70128

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50132

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5368

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1053626

Other (OTH)

AF:

0.0000183

AC:

AN:

54604

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000138

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41578

American (AMR)

AF:

0.0000653

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00367

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.000144

ExAC

AF:

0.000175

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Jan 16, 2017

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Facioscapulohumeral muscular dystrophy 2

Benign:1

Dec 01, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.62

BayesDel_noAF

Benign

-0.66

CADD

Benign

7.1

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.052

Eigen

Benign

-0.93

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.024

LIST_S2

Benign

0.36

M_CAP

Uncertain

0.087

MetaRNN

Benign

0.0045

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PhyloP100

-0.080

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-0.010

REVEL

Benign

0.015

Sift

Benign

0.25

Sift4G

Benign

0.12

Polyphen

0.0040

Vest4

0.075

MutPred

0.23

Gain of sheet (P = 0.0827);

MVP

0.043

MPC

0.59

ClinPred

0.011

GERP RS

2.1

PromoterAI

0.10

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.055

gMVP

0.16

Mutation Taster

=99/1

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.

chr18-2656129-G-C

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