VCV002579263.2 - ClinVar

GRCh38/hg38 Xp11.4(chrX:41786713-41853325)x0

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(1)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Uncertain significance

criteria provided, single submitter

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

GRCh38/hg38 Xp11.4(chrX:41786713-41853325)x0

Variation ID: 2579263 Accession: VCV002579263.2

Type and length

copy number loss, 66,613 bp

Location

Cytogenetic: Xp11.4 X: 41786713-41853325 (GRCh38) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Sep 16, 2023	Mar 30, 2024	Feb 21, 2024

HGVS

Protein change

Other names

Canonical SPDI

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
CASK		Sufficient evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh37	756	988

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Syndromic X-linked intellectual disability Najm type	Uncertain significance (1)	criteria provided, single submitter	Feb 21, 2024	RCV003327702.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Feb 21, 2024)	criteria provided, single submitter (ACMG/ClinGen CNV Guidelines, 2019) Method: research	Syndromic X-linked intellectual disability Najm type (X-linked inheritance) Affected status: yes Allele origin: de novo	Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard Accession: SCV004034232.2 First in ClinVar: Sep 16, 2023 Last updated: Mar 30, 2024	Comment: A confirmed de novo hemizygous deletion of exons 2-3 in CASK (NM_001367721.1) was identified by exome sequencing and confirmed by genome sequencing in one male … (more) A confirmed de novo hemizygous deletion of exons 2-3 in CASK (NM_001367721.1) was identified by exome sequencing and confirmed by genome sequencing in one male with X-linked syndromic intellectual disability ([GRCh 38]chrX:41775373_41856473x0). The patient phenotype is nonspecific, but is consistent with cases described in the literature and/or published databases with overlapping variants. This intragenic deletion of 2 exons is not predicted to alter the protein reading-frame and it is unclear if this deletion will impact the protein. Heterozygous loss of function of CASK is an established disease mechanism in X-linked syndromic intellectual disability (https://search.clinicalgenome.org/kb/gene-dosage). In summary, while there is some suspicion for a pathogenic role, the clinical significance of this variant is uncertain. The ACMG/ClinGen evidence codes and points used in this curation are as follows: 1: 0 points, 2: 0. 0.30 points, 3: 0 points, 4-5: 0.15 points; Total: 0.45 points; Riggs 2020 (PMID: 31690835). (less)

Comment:

A confirmed de novo hemizygous deletion of exons 2-3 in CASK (NM_001367721.1) was identified by exome sequencing and confirmed by genome sequencing in one male with X-linked syndromic intellectual disability ([GRCh 38]chrX:41775373_41856473x0). The patient phenotype is nonspecific, but is consistent with cases described in the literature and/or published databases with overlapping variants. This intragenic deletion of 2 exons is not predicted to alter the protein reading-frame and it is unclear if this deletion will impact the protein. Heterozygous loss of function of CASK is an established disease mechanism in X-linked syndromic intellectual disability (https://search.clinicalgenome.org/kb/gene-dosage). In summary, while there is some suspicion for a pathogenic role, the clinical significance of this variant is uncertain. The ACMG/ClinGen evidence codes and points used in this curation are as follows: 1: 0 points, 2: 0. 0.30 points, 3: 0 points, 4-5: 0.15 points; Total: 0.45 points; Riggs 2020 (PMID: 31690835).

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for this variant ...

Record last updated Apr 06, 2024

ClinVar Genomic variation as it relates to human health

GRCh38/hg38 Xp11.4(chrX:41786713-41853325)x0

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...