rs202153551

Positions:

chrX-18650466-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 8P and 16B. PVS1BP6_Very_StrongBS1BS2

The ENST00000379989.6(CDKL5):c.2854C>T(p.Arg952Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000496 in 1,210,305 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 17 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000062 ( 0 hom., 0 hem., cov: 24)

Exomes 𝑓: 0.000048 ( 0 hom. 17 hem. )

Consequence

CDKL5
ENST00000379989.6 stop_gained

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -1.81

Variant links:

Genes affected

CDKL5 (HGNC:11411): (cyclin dependent kinase like 5) This gene is a member of Ser/Thr protein kinase family and encodes a phosphorylated protein with protein kinase activity. Mutations in this gene have been associated with X-linked infantile spasm syndrome (ISSX), also known as X-linked West syndrome, and Rett syndrome (RTT). Alternate transcriptional splice variants have been characterized. [provided by RefSeq, Jul 2008]

CDKL5 links:

RS1 (HGNC:10457): (retinoschisin 1) This gene encodes an extracellular protein that plays a crucial role in the cellular organization of the retina. The encoded protein is assembled and secreted from photoreceptors and bipolar cells as a homo-oligomeric protein complex. Mutations in this gene are responsible for X-linked retinoschisis, a common, early-onset macular degeneration in males that results in a splitting of the inner layers of the retina and severe loss in vision. [provided by RefSeq, Oct 2008]

RS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

BP6

Variant X-18650466-C-T is Benign according to our data. Variant chrX-18650466-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 143811.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-18650466-C-T is described in Lovd as [Pathogenic].

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0000624 (7/112257) while in subpopulation EAS AF= 0.00112 (4/3573). AF 95% confidence interval is 0.000382. There are 0 homozygotes in gnomad4. There are 0 alleles in male gnomad4 subpopulation. Median coverage is 24. This position pass quality control queck.

BS2

High Hemizygotes in GnomAdExome4 at 17 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
RS1	NM_000330.4 linkuse as main transcript	c.185-3134G>A		intron_variant		ENST00000379984.4	NP_000321.1
CDKL5	NM_001037343.2 linkuse as main transcript	c.2854C>T	p.Arg952Ter	stop_gained	21/22		NP_001032420.1
CDKL5	NM_003159.3 linkuse as main transcript	c.2854C>T	p.Arg952Ter	stop_gained	20/21		NP_003150.1
RS1	XM_047442337.1 linkuse as main transcript	c.-83G>A		5_prime_UTR_variant	1/4		XP_047298293.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RS1	ENST00000379984.4 linkuse as main transcript	c.185-3134G>A		intron_variant		1	NM_000330.4	ENSP00000369320	P1

Frequencies

GnomAD3 genomes

AF:

0.0000624

AC:

AN:

112257

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34407

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:

0.00112

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000564

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000196

AC:

AN:

183500

Hom.:

AF XY:

0.000162

AC XY:

AN XY:

67930

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00224

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000488

Gnomad OTH exome

AF:

0.000221

GnomAD4 exome

AF:

0.0000483

AC:

AN:

1098048

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

363404

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00109

Gnomad4 SAS exome

AF:

0.0000554

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000713

Gnomad4 OTH exome

AF:

0.000195

GnomAD4 genome

AF:

0.0000624

AC:

AN:

112257

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34407

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00112

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000564

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000141

Hom.:

Bravo

AF:

0.0000604

ExAC

AF:

0.000123

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Benign, no assertion criteria provided

curation

RettBASE

May 09, 2014

In exon 20, affecting only the transcript lowly expressed; found in multiple normal females in control population and normal family members -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 02, 2017

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

CDKL5 disorder

Benign:1

Benign, criteria provided, single submitter

curation

Centre for Population Genomics, CPG

Aug 21, 2024

This variant has been collected from RettBASE and curated to current modified ACMG/AMP criteria. Based on the classification scheme defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders Specifications to the ACMG/AMP Variant Interpretation Guidelines VCEP 3.0, this variant is classified as benign. At least the following criteria are met: The allele frequency of this variant in at least one population in gnomAD v4 is higher than the 0.03% threshold defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders VCEP 3.0 (BA1). -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Nov 07, 2019

This variant is associated with the following publications: (PMID: 26112015, 23756444, 22779007, 21775177, 25525159, 27824329, 30564305, 29933521, 30405208, 30763456) -

Developmental and epileptic encephalopathy, 2;CN128785:Angelman syndrome-like

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 23, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Benign

0.71

FATHMM_MKL

Benign

0.00066

MutationTaster

Benign

1.0

A;A;N

Vest4

0.41

GERP RS

-7.6

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over