chr7-94537838-A-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_022900.5(CASD1):c.1210A>T(p.Ile404Phe) variant causes a missense change. The variant allele was found at a frequency of 0.0000133 in 1,582,608 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

CASD1
NM_022900.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.17

Publications

2 publications found

Variant links:

Genes affected

CASD1 (HGNC:16014): (CAS1 domain containing 1) Enables N-acetylneuraminate 7-O(or 9-O)-acetyltransferase activity. Involved in carbohydrate metabolic process. Is integral component of Golgi membrane. [provided by Alliance of Genome Resources, Apr 2022]

CASD1 links:

SGCE (HGNC:10808): (sarcoglycan epsilon) This gene encodes the epsilon member of the sarcoglycan family. Sarcoglycans are transmembrane proteins that are components of the dystrophin-glycoprotein complex, which link the actin cytoskeleton to the extracellular matrix. Unlike other family members which are predominantly expressed in striated muscle, the epsilon sarcoglycan is more broadly expressed. Mutations in this gene are associated with myoclonus-dystonia syndrome. This gene is imprinted, with preferential expression from the paternal allele. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. A pseudogene associated with this gene is located on chromosome 2. [provided by RefSeq, Oct 2016]

SGCE Gene-Disease associations (from GenCC):

myoclonic dystonia 11
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Illumina
myoclonus-dystonia syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SGCE links:

ENSG00000309657 (HGNC:):

ENSG00000309657 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASD1	NM_022900.5 link	c.1210A>T	p.Ile404Phe	missense_variant	Exon 9 of 18	ENST00000297273.9	NP_075051.4	Q96PB1Q8WZ77

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CASD1	ENST00000297273.9 link	c.1210A>T	p.Ile404Phe	missense_variant	Exon 9 of 18	1	NM_022900.5	ENSP00000297273.4	Q96PB1
SGCE	ENST00000645624.1 link	n.834-13565T>A		intron_variant	Intron 6 of 6
ENSG00000309657	ENST00000842810.1 link	n.150+20643T>A		intron_variant	Intron 2 of 3
ENSG00000309657	ENST00000842811.1 link	n.172+20584T>A		intron_variant	Intron 2 of 3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152150

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000400

AC:

AN:

249700

AF XY:

0.00000740

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:

0.00000885

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000133

AC:

AN:

1430458

Hom.:

Cov.:

AF XY:

0.0000140

AC XY:

AN XY:

713680

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32746

American (AMR)

AF:

0.00

AC:

AN:

44584

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25918

East Asian (EAS)

AF:

0.00

AC:

AN:

39474

South Asian (SAS)

AF:

0.00

AC:

AN:

85478

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53142

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5710

European-Non Finnish (NFE)

AF:

0.0000175

AC:

AN:

1084020

Other (OTH)

AF:

0.00

AC:

AN:

59386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.436

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74324

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41458

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67972

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000451

Hom.:

Bravo

AF:

0.0000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 17, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1210A>T (p.I404F) alteration is located in exon 9 (coding exon 9) of the CASD1 gene. This alteration results from a A to T substitution at nucleotide position 1210, causing the isoleucine (I) at amino acid position 404 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.026

BayesDel_noAF

Benign

-0.27

CADD

Uncertain

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.049

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.020

MetaRNN

Uncertain

0.58

MetaSVM

Benign

-0.94

MutationAssessor

Benign

0.77

PhyloP100

5.2

PrimateAI

Pathogenic

0.81

PROVEAN

Benign

-1.9

REVEL

Benign

0.22

Sift

Uncertain

0.0050

Sift4G

Benign

0.090

Polyphen

0.94

Vest4

0.65

MVP

0.64

MPC

1.4

ClinPred

0.75

GERP RS

4.3

Varity_R

0.42

gMVP

0.57

Mutation Taster

=22/78

disease causing

(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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chr7-94537838-A-T

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