Genetic Variant CASK:p.Asn423Asn (chrX-41586952-G-A) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP7

The NM_001367721.1(CASK):c.1269C>T(p.Asn423Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000188 in 1,064,748 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0000019 ( 0 hom. 0 hem. )

Consequence

CASK
NM_001367721.1 synonymous

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.55

Publications

0 publications found

Variant links:

Genes affected

CASK (HGNC:1497): (calcium/calmodulin dependent serine protein kinase) This gene encodes a calcium/calmodulin-dependent serine protein kinase. The encoded protein is a MAGUK (membrane-associated guanylate kinase) protein family member. These proteins are scaffold proteins and the encoded protein is located at synapses in the brain. Mutations in this gene are associated with FG syndrome 4, intellectual disability and microcephaly with pontine and cerebellar hypoplasia, and a form of X-linked intellectual disability. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2017]

CASK Gene-Disease associations (from GenCC):

FG syndrome 4
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
syndromic X-linked intellectual disability Najm type
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
X-linked syndromic intellectual disability
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
genetic developmental and epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CASK links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.44).

BP7

Synonymous conserved (PhyloP=2.55 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASK	NM_001367721.1 link	c.1269C>T	p.Asn423Asn	synonymous_variant	Exon 14 of 27	ENST00000378163.7	NP_001354650.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CASK	ENST00000378163.7 link	c.1269C>T	p.Asn423Asn	synonymous_variant	Exon 14 of 27	5	NM_001367721.1	ENSP00000367405.1		O14936-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000188

AC:

AN:

1064748

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

336056

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

25800

American (AMR)

AF:

0.00

AC:

AN:

35087

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19125

East Asian (EAS)

AF:

0.0000334

AC:

AN:

29940

South Asian (SAS)

AF:

0.00

AC:

AN:

53074

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39773

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3953

European-Non Finnish (NFE)

AF:

0.00000123

AC:

AN:

813097

Other (OTH)

AF:

0.00

AC:

AN:

44899

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Syndromic X-linked intellectual disability Najm type

Uncertain:1

Mar 04, 2013

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.44

CADD

Benign

5.5

(source)

DANN

Benign

0.64

PhyloP100

2.5

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over