NM_001134407.3(GRIN2A):c.809_810del (p.Lys270fs) AND Landau-Kleffner syndrome

Germline classification:: Pathogenic (1 submission)
Last evaluated:: Sep 14, 2022
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:: RCV002871814.2

Allele description [Variation Report for NM_001134407.3(GRIN2A):c.809_810del (p.Lys270fs)]

NM_001134407.3(GRIN2A):c.809_810del (p.Lys270fs)

Gene:

GRIN2A:glutamate ionotropic receptor NMDA type subunit 2A [Gene - OMIM - HGNC]

Variant type:

Deletion

Cytogenetic location:

16p13.2

Genomic location:

Preferred name:

NM_001134407.3(GRIN2A):c.809_810del (p.Lys270fs)

HGVS:

NC_000016.10:g.9938158_9938159del
NG_011812.2:g.249598_249599del
NM_000833.5:c.809_810del
NM_001134407.3:c.809_810delMANE SELECT
NM_001134408.2:c.809_810del
NP_000824.1:p.Lys270fs
NP_001127879.1:p.Lys270fs
NP_001127880.1:p.Lys270fs
NC_000016.9:g.10032013_10032014del
NC_000016.9:g.10032015_10032016del

Protein change:

K270fs

Molecular consequence:

NM_000833.5:c.809_810del - frameshift variant - [Sequence Ontology: SO:0001589]
NM_001134407.3:c.809_810del - frameshift variant - [Sequence Ontology: SO:0001589]
NM_001134408.2:c.809_810del - frameshift variant - [Sequence Ontology: SO:0001589]

Condition(s)

Name:: Landau-Kleffner syndrome (FESD)
Synonyms:: Acquired aphasia with convulsive disorder; Acquired epileptiform aphasia; APHASIA, ACQUIRED, WITH EPILEPSY; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0009509; MedGen: C0282512; Orphanet: 1945; Orphanet: 725; Orphanet: 98818; OMIM: 245570

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV003235582	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Pathogenic (Sep 14, 2022)	germline	clinical testing	PubMed (3) [See all records that cite these PMIDs] 23933819, 23933820, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV003235582

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Pathogenic
(Sep 14, 2022)

germline

clinical testing

PubMed (3)
[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

Mutations in GRIN2A cause idiopathic focal epilepsy with rolandic spikes.

Lemke JR, Lal D, Reinthaler EM, Steiner I, Nothnagel M, Alber M, Geider K, Laube B, Schwake M, Finsterwalder K, Franke A, Schilhabel M, Jähn JA, Muhle H, Boor R, Van Paesschen W, Caraballo R, Fejerman N, Weckhuysen S, De Jonghe P, Larsen J, Møller RS, et al.

Nat Genet. 2013 Sep;45(9):1067-72. doi: 10.1038/ng.2728. Epub 2013 Aug 11.

PubMed [citation]

PMID:: 23933819

GRIN2A mutations in acquired epileptic aphasia and related childhood focal epilepsies and encephalopathies with speech and language dysfunction.

Lesca G, Rudolf G, Bruneau N, Lozovaya N, Labalme A, Boutry-Kryza N, Salmi M, Tsintsadze T, Addis L, Motte J, Wright S, Tsintsadze V, Michel A, Doummar D, Lascelles K, Strug L, Waters P, de Bellescize J, Vrielynck P, de Saint Martin A, Ville D, Ryvlin P, et al.

Nat Genet. 2013 Sep;45(9):1061-6. doi: 10.1038/ng.2726. Epub 2013 Aug 11.

PubMed [citation]

PMID:: 23933820

See all PubMed Citations (3)

Details of each submission

From Invitae, SCV003235582.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

Description

This variant has not been reported in the literature in individuals affected with GRIN2A-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Lys270Argfs*13) in the GRIN2A gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in GRIN2A are known to be pathogenic (PMID: 23933819, 23933820). 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: Feb 20, 2024

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