Genetic Variant NM_001367721.1:c.880C>A (chrX-41636613-G-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP2

The NM_001367721.1(CASK):c.880C>A(p.Gln294Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000922 in 1,084,655 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 9.2e-7 ( 0 hom. 0 hem. )

Consequence

CASK
NM_001367721.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.56

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 links:

LOC124905180 (HGNC:):

LOC124905180 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the CASK gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 30 curated pathogenic missense variants (we use a threshold of 10). The gene has 23 curated benign missense variants. Gene score misZ: 4.2502 (above the threshold of 3.09). GenCC associations: The gene is linked to syndromic X-linked intellectual disability Najm type, X-linked syndromic intellectual disability, developmental and epileptic encephalopathy, FG syndrome 4.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASK	NM_001367721.1 link	c.880C>A	p.Gln294Lys	missense_variant	Exon 9 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.880C>A	p.Gln294Lys	missense_variant	Exon 9 of 27	5	NM_001367721.1	ENSP00000367405.1		O14936-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.22e-7

AC:

AN:

1084655

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

351379

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000121

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.87

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Uncertain

0.040

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.33

.;.;.;.;.;.;T;.;.;.;.;.;.;.

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

D;D;D;D;D;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.053

MetaRNN

Uncertain

0.57

D;D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Benign

-0.61

MutationAssessor

Benign

0.83

L;L;.;L;.;.;L;.;.;.;L;.;.;.

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-1.4

.;N;.;.;.;.;N;.;N;N;N;N;.;.

REVEL

Uncertain

0.38

Sift

Uncertain

0.014

.;D;.;.;.;.;D;.;D;D;T;D;.;.

Sift4G

Benign

0.95

.;T;.;.;.;.;T;.;T;T;T;T;.;.

Polyphen

0.14

B;P;.;P;.;.;P;.;.;.;.;.;.;.

Vest4

0.54, 0.55, 0.54, 0.49, 0.58, 0.55

MutPred

0.44

Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);.;.;Gain of MoRF binding (P = 0.0346);.;Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);Gain of MoRF binding (P = 0.0346);.;.;

MVP

0.96

MPC

1.7

ClinPred

0.81

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.63

gMVP

0.91

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over