chrX-53412010-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_006306.4(SMC1A):c.1098G>A(p.Thr366Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00024 in 1,209,712 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 97 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.00025 ( 0 hom. 95 hem. )

Consequence

SMC1A
NM_006306.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -1.59

Publications

0 publications found

Variant links:

Genes affected

SMC1A (HGNC:11111): (structural maintenance of chromosomes 1A) Proper cohesion of sister chromatids is a prerequisite for the correct segregation of chromosomes during cell division. The cohesin multiprotein complex is required for sister chromatid cohesion. This complex is composed partly of two structural maintenance of chromosomes (SMC) proteins, SMC3 and either SMC1B or the protein encoded by this gene. Most of the cohesin complexes dissociate from the chromosomes before mitosis, although those complexes at the kinetochore remain. Therefore, the encoded protein is thought to be an important part of functional kinetochores. In addition, this protein interacts with BRCA1 and is phosphorylated by ATM, indicating a potential role for this protein in DNA repair. This gene, which belongs to the SMC gene family, is located in an area of the X-chromosome that escapes X inactivation. Mutations in this gene result in Cornelia de Lange syndrome. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2013]

SMC1A Gene-Disease associations (from GenCC):

Cornelia de Lange syndrome 2
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
developmental and epileptic encephalopathy, 85, with or without midline brain defects
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
X-linked complex neurodevelopmental disorder
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
atypical Rett syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Cornelia de Lange syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SMC1A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.59).

BP6

Variant X-53412010-C-T is Benign according to our data. Variant chrX-53412010-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 448420.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-1.59 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000116 (13/111735) while in subpopulation AFR AF = 0.000195 (6/30790). AF 95% confidence interval is 0.0000847. There are 0 homozygotes in GnomAd4. There are 2 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High AC in GnomAd4 at 13 AD,XL gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMC1A	NM_006306.4 link	c.1098G>A	p.Thr366Thr	synonymous_variant	Exon 6 of 25	ENST00000322213.9	NP_006297.2	Q14683A0A384MR33Q68EN4
SMC1A	NM_001281463.1 link	c.1032G>A	p.Thr344Thr	synonymous_variant	Exon 7 of 26		NP_001268392.1	G8JLG1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMC1A	ENST00000322213.9 link	c.1098G>A	p.Thr366Thr	synonymous_variant	Exon 6 of 25	1	NM_006306.4	ENSP00000323421.3		Q14683

Frequencies

GnomAD3 genomes

AF:

0.000116

AC:

AN:

111735

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000195

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000956

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000113

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000989

AC:

AN:

181972

AF XY:

0.000105

show subpopulations

Gnomad AFR exome

AF:

0.000306

Gnomad AMR exome

AF:

0.0000366

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000161

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000252

AC:

277

AN:

1097977

Hom.:

Cov.:

AF XY:

0.000261

AC XY:

AN XY:

363337

show subpopulations

African (AFR)

AF:

0.000417

AC:

AN:

26395

American (AMR)

AF:

0.00

AC:

AN:

35192

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19380

East Asian (EAS)

AF:

0.00

AC:

AN:

30197

South Asian (SAS)

AF:

0.00

AC:

AN:

54084

European-Finnish (FIN)

AF:

0.0000247

AC:

AN:

40512

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4137

European-Non Finnish (NFE)

AF:

0.000308

AC:

259

AN:

841997

Other (OTH)

AF:

0.000130

AC:

AN:

46083

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.000116

AC:

AN:

111735

Hom.:

Cov.:

AF XY:

0.0000590

AC XY:

AN XY:

33883

show subpopulations

African (AFR)

AF:

0.000195

AC:

AN:

30790

American (AMR)

AF:

0.0000956

AC:

AN:

10463

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2647

East Asian (EAS)

AF:

0.00

AC:

AN:

3540

South Asian (SAS)

AF:

0.00

AC:

AN:

2671

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6081

Middle Eastern (MID)

AF:

0.00

AC:

AN:

238

European-Non Finnish (NFE)

AF:

0.000113

AC:

AN:

53118

Other (OTH)

AF:

0.00

AC:

AN:

1504

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

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:

0.000217

Hom.:

Bravo

AF:

0.000144

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Dec 20, 2016

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Congenital muscular hypertrophy-cerebral syndrome

Benign:1

Nov 20, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Congenital muscular hypertrophy-cerebral syndrome;C5393312:Developmental and epileptic encephalopathy, 85, with or without midline brain defects

Benign:1

Sep 01, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.59

CADD

Benign

1.6

(source)

DANN

Benign

0.63

PhyloP100

-1.6

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

2.8

Mutation Taster

=100/0

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

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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