NM_001323289.2(CDKL5):c.2247_2250dup (p.Lys751fs) AND multiple conditions

Germline classification:: Pathogenic (1 submission)
Last evaluated:: Oct 5, 2023
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV003817697.2

Allele description [Variation Report for NM_001323289.2(CDKL5):c.2247_2250dup (p.Lys751fs)]

NM_001323289.2(CDKL5):c.2247_2250dup (p.Lys751fs)

Gene:

CDKL5:cyclin dependent kinase like 5 [Gene - OMIM - HGNC]

Variant type:

Duplication

Cytogenetic location:

Xp22.13

Genomic location:

Preferred name:

NM_001323289.2(CDKL5):c.2247_2250dup (p.Lys751fs)

HGVS:

NC_000023.11:g.18613246_18613249dup
NG_008475.1:g.192642_192645dup
NM_001037343.2:c.2247_2250dup
NM_001323289.2:c.2247_2250dupMANE SELECT
NM_003159.3:c.2247_2250dup
NP_001032420.1:p.Lys751fs
NP_001310218.1:p.Lys751fs
NP_003150.1:p.Lys751fs
NC_000023.10:g.18631363_18631364insCACT
NC_000023.10:g.18631366_18631369dup

Protein change:

K751fs

Molecular consequence:

NM_001037343.2:c.2247_2250dup - frameshift variant - [Sequence Ontology: SO:0001589]
NM_001323289.2:c.2247_2250dup - frameshift variant - [Sequence Ontology: SO:0001589]
NM_003159.3:c.2247_2250dup - frameshift variant - [Sequence Ontology: SO:0001589]

Condition(s)

Name:: Developmental and epileptic encephalopathy, 2 (DEE2)
Synonyms:: INFANTILE SPASM SYNDROME, X-LINKED 2; Early infantile epileptic encephalopathy 2
Identifiers:: MONDO: MONDO:0010396; MedGen: C4750718; Orphanet: 1934; Orphanet: 3451; OMIM: 300672

Name:: Angelman syndrome-like
Identifiers:: MedGen: CN128785

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004606228	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Oct 5, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 22872100, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004606228

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Pathogenic
(Oct 5, 2023)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

The CDKL5 disorder is an independent clinical entity associated with early-onset encephalopathy.

Fehr S, Wilson M, Downs J, Williams S, Murgia A, Sartori S, Vecchi M, Ho G, Polli R, Psoni S, Bao X, de Klerk N, Leonard H, Christodoulou J.

Eur J Hum Genet. 2013 Mar;21(3):266-73. doi: 10.1038/ejhg.2012.156. Epub 2012 Aug 8.

PubMed [citation]

PMID:: 22872100
PMCID:: PMC3573195

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV004606228.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change creates a premature translational stop signal (p.Lys751Leufs*14) in the CDKL5 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CDKL5 are known to be pathogenic (PMID: 22872100). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CDKL5-related conditions. For these reasons, this variant has been classified as Pathogenic.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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