rs143992148

Positions:

chrX-18604355-T-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001323289.2(CDKL5):c.1431T>C(p.Ser477=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000435 in 1,207,197 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 151 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00029 ( 0 hom., 4 hem., cov: 23)

Exomes 𝑓: 0.00045 ( 0 hom. 147 hem. )

Consequence

CDKL5
NM_001323289.2 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: -0.658

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.77).

BP6

Variant X-18604355-T-C is Benign according to our data. Variant chrX-18604355-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 136712.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.658 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000287 (32/111376) while in subpopulation NFE AF= 0.000528 (28/53032). AF 95% confidence interval is 0.000375. There are 0 homozygotes in gnomad4. There are 4 alleles in male gnomad4 subpopulation. Median coverage is 23. This position pass quality control queck.

BS2

High Hemizygotes in GnomAd4 at 4 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CDKL5	NM_001323289.2 linkuse as main transcript	c.1431T>C	p.Ser477=	synonymous_variant	12/18	ENST00000623535.2	NP_001310218.1
CDKL5	NM_001037343.2 linkuse as main transcript	c.1431T>C	p.Ser477=	synonymous_variant	13/22		NP_001032420.1
CDKL5	NM_003159.3 linkuse as main transcript	c.1431T>C	p.Ser477=	synonymous_variant	12/21		NP_003150.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDKL5	ENST00000623535.2 linkuse as main transcript	c.1431T>C	p.Ser477=	synonymous_variant	12/18	1	NM_001323289.2	ENSP00000485244	P1	O76039-2

Frequencies

GnomAD3 genomes

AF:

0.000287

AC:

AN:

111376

Hom.:

Cov.:

AF XY:

0.000119

AC XY:

AN XY:

33558

show subpopulations

Gnomad AFR

AF:

0.0000982

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000946

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000528

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000204

AC:

AN:

181619

Hom.:

AF XY:

0.000241

AC XY:

AN XY:

66471

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000420

Gnomad OTH exome

AF:

0.000670

GnomAD4 exome

AF:

0.000450

AC:

493

AN:

1095821

Hom.:

Cov.:

AF XY:

0.000407

AC XY:

147

AN XY:

361607

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:

0.000550

Gnomad4 OTH exome

AF:

0.000674

GnomAD4 genome

AF:

0.000287

AC:

AN:

111376

Hom.:

Cov.:

AF XY:

0.000119

AC XY:

AN XY:

33558

show subpopulations

Gnomad4 AFR

AF:

0.0000982

Gnomad4 AMR

AF:

0.0000946

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000528

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000217

Hom.:

Bravo

AF:

0.000272

EpiCase

AF:

0.000872

EpiControl

AF:

0.000534

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Aug 10, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 15, 2017	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 19, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	curation	RettBASE	Mar 13, 2014	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 17, 2017

This alteration is classified as 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

Jul 12, 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 v2/3 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

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Apr 05, 2019

- -

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

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 10, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.77

CADD

Benign

6.9

DANN

Benign

0.63

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