rs587783114

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BS2_SupportingBA1

This summary comes from the ClinGen Evidence Repository: The allele frequency of the p.Ala486_Lys487del variant in CDKL5 is 0.03% in Latino/Admixed American sub population in gnomAD, which is high enough to be classified as benign based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BA1). The p.Ala486_Lys487del variant is observed in 1 unaffected individual (RettBASE, PMID 22867051) (BS2_supporting). In summary, the p.Ala486_Lys487del variant in CDKL5 is classified as benign based on the ACMG/AMP criteria applied (BA1, BS2_supporting). LINK:https://erepo.genome.network/evrepo/ui/classification/CA199357/MONDO:0100039/016

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., 2 hem., cov: 22)

Exomes 𝑓: 0.000098 ( 0 hom. 41 hem. )

Consequence

CDKL5
NM_001323289.2 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Benign reviewed by expert panel U:1B:5

Conservation

PhyloP100: 6.36

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

CDKL5 disorder
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy, 2
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
atypical Rett syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
genetic developmental and epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
infantile spasms
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
precocious puberty
Inheritance: XL Classification: LIMITED Submitted by: Ambry Genetics

CDKL5 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BS2

For more information check the summary or visit ClinGen Evidence Repository.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CDKL5	NM_001323289.2 link	c.1455_1460delGGCCAA	p.Ala486_Lys487del	disruptive_inframe_deletion	Exon 12 of 18	ENST00000623535.2	NP_001310218.1
CDKL5	NM_001037343.2 link	c.1455_1460delGGCCAA	p.Ala486_Lys487del	disruptive_inframe_deletion	Exon 13 of 22		NP_001032420.1
CDKL5	NM_003159.3 link	c.1455_1460delGGCCAA	p.Ala486_Lys487del	disruptive_inframe_deletion	Exon 12 of 21		NP_003150.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDKL5	ENST00000623535.2 link	c.1455_1460delGGCCAA	p.Ala486_Lys487del	disruptive_inframe_deletion	Exon 12 of 18	1	NM_001323289.2	ENSP00000485244.1

Frequencies

GnomAD3 genomes

AF:

0.0000270

AC:

AN:

111061

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000328

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000378

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000660

AC:

AN:

181925

AF XY:

0.0000600

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000329

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000247

Gnomad OTH exome

AF:

0.000223

GnomAD4 exome

AF:

0.0000985

AC:

108

AN:

1096500

Hom.:

AF XY:

0.000113

AC XY:

AN XY:

362182

show subpopulations

African (AFR)

AF:

0.0000380

AC:

AN:

26341

American (AMR)

AF:

0.000256

AC:

AN:

35124

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19325

East Asian (EAS)

AF:

0.00

AC:

AN:

30173

South Asian (SAS)

AF:

0.00

AC:

AN:

54063

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40504

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4123

European-Non Finnish (NFE)

AF:

0.000114

AC:

AN:

840830

Other (OTH)

AF:

0.0000435

AC:

AN:

46017

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.453

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000270

AC:

AN:

111061

Hom.:

Cov.:

AF XY:

0.0000601

AC XY:

AN XY:

33303

show subpopulations

African (AFR)

AF:

0.0000328

AC:

AN:

30453

American (AMR)

AF:

0.00

AC:

AN:

10540

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2643

East Asian (EAS)

AF:

0.00

AC:

AN:

3525

South Asian (SAS)

AF:

0.00

AC:

AN:

2606

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5966

Middle Eastern (MID)

AF:

0.00

AC:

AN:

239

European-Non Finnish (NFE)

AF:

0.0000378

AC:

AN:

52915

Other (OTH)

AF:

0.00

AC:

AN:

1500

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000529

ClinVar

Significance: Benign

Submissions summary: Uncertain:1Benign:5

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

CDKL5 disorder

Benign:2

Feb 18, 2022

ClinGen Rett and Angelman-like Disorders Variant Curation Expert Panel

Significance:Benign

Review Status:reviewed by expert panel

Collection Method:curation

The allele frequency of the p.Ala486_Lys487del variant in CDKL5 is 0.03% in Latino/Admixed American sub population in gnomAD, which is high enough to be classified as benign based on thresholds defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like conditions (BA1). The p.Ala486_Lys487del variant is observed in 1 unaffected individual (RettBASE, PMID 22867051) (BS2_supporting). In summary, the p.Ala486_Lys487del variant in CDKL5 is classified as benign based on the ACMG/AMP criteria applied (BA1, BS2_supporting). -

Sep 13, 2024

Centre for Population Genomics, CPG

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:curation

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 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

Uncertain:1

Jun 19, 2016

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1455_1460delGGCCAA variant in the CDKL5 gene has been previously identified in a female patient with developmental delay, absent speech, seizures, and difficulty walking; however, it was classified by the authors as a variant of unknown significance because it was inherited from her unaffected mother and both the patient and her mother had normal X-inactivation studies (Maortua et al., 2012). The variant results in an in-frame deletion of two amino acids. Therefore, based on the currently available information, it is unclear whether c.1455_1460delGGCCAA is a pathogenic variant or a rare benign variant. -

not specified

Benign:1

May 09, 2014

RettBASE

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:curation

Found in unaffected female -

CDKL5-related disorder

Benign:1

Aug 09, 2022

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

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

Benign:1

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

6.4

Mutation Taster

=147/53

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over