chr7-39950820-TC-T

Position:

• chr7-39950820-TC-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_003718.5(CDK13):​c.181del​(p.Leu61TrpfsTer80) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDK13 NM_003718.5 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 2.72

Genes affected

CDK13 (HGNC:1733): (cyclin dependent kinase 13) The protein encoded by this gene is a member of the cyclin-dependent serine/threonine protein kinase family. Members of this family are well known for their essential roles as master switches in cell cycle control. The exact function of this protein has not yet been determined, but it may play a role in mRNA processing and may be involved in regulation of hematopoiesis. Alternatively spliced transcript variants have been described.[provided by RefSeq, Dec 2009]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 7-39950820-TC-T is Pathogenic according to our data. Variant chr7-39950820-TC-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 521173.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-39950820-TC-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDK13	NM_003718.5	c.181del	p.Leu61TrpfsTer80	frameshift_variant	1/14	ENST00000181839.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDK13	ENST00000181839.10	c.181del	p.Leu61TrpfsTer80	frameshift_variant	1/14	1	NM_003718.5	P3
CDK13	ENST00000340829.10	c.181del	p.Leu61TrpfsTer80	frameshift_variant	1/14	1		A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 16, 2023

The c.181delC (p.L61Wfs*80) alteration, located in exon 1 (coding exon 1) of the CDK13 gene, consists of a deletion of one nucleotide at position 181, causing a translational frameshift with a predicted alternate stop codon after 80 amino acids. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. This variant was not reported in population-based cohorts in the Genome Aggregation Database (gnomAD). This variant has been determined to be the result of a de novo mutation in one individual with features consistent with CDK13-related neurodevelopmental disorder (Lee, 2020). Based on the available evidence, this alteration is classified as pathogenic. -

Congenital heart defects, dysmorphic facial features, and intellectual developmental disorder Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Undiagnosed Diseases Network, NIH

Mar 07, 2019

- -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs1554317002; hg19: chr7-39990419;