VCV001705452.1 - ClinVar

NM_001165963.4(SCN1A):c.835C>T (p.Gln279Ter)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(1)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Pathogenic

criteria provided, single submitter

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_001165963.4(SCN1A):c.835C>T (p.Gln279Ter)

Variation ID: 1705452 Accession: VCV001705452.1

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 2q24.3 2: 166051848 (GRCh38) [ NCBI UCSC ] 2: 166908358 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Sep 17, 2022	Sep 17, 2022	Sep 1, 2022

HGVS

Nucleotide	Protein	Molecular consequence
NM_001165963.4:c.835C>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_001159435.1:p.Gln279Ter	nonsense
NM_001165964.3:c.835C>T	NP_001159436.1:p.Gln279Ter	nonsense
NM_001202435.3:c.835C>T	NP_001189364.1:p.Gln279Ter	nonsense
NM_001353948.2:c.835C>T	NP_001340877.1:p.Gln279Ter	nonsense
NM_001353949.2:c.835C>T	NP_001340878.1:p.Gln279Ter	nonsense
NM_001353950.2:c.835C>T	NP_001340879.1:p.Gln279Ter	nonsense
NM_001353951.2:c.835C>T	NP_001340880.1:p.Gln279Ter	nonsense
NM_001353952.2:c.835C>T	NP_001340881.1:p.Gln279Ter	nonsense
NM_001353954.2:c.835C>T	NP_001340883.1:p.Gln279Ter	nonsense
NM_001353955.2:c.835C>T	NP_001340884.1:p.Gln279Ter	nonsense
NM_001353957.2:c.835C>T	NP_001340886.1:p.Gln279Ter	nonsense
NM_001353958.2:c.835C>T	NP_001340887.1:p.Gln279Ter	nonsense
NM_001353960.2:c.835C>T	NP_001340889.1:p.Gln279Ter	nonsense
NM_001353961.2:c.-1591C>T		5 prime UTR
NM_006920.6:c.835C>T	NP_008851.3:p.Gln279Ter	nonsense
NR_148667.2:n.1221C>T		non-coding transcript variant
NC_000002.12:g.166051848G>A
NC_000002.11:g.166908358G>A
NG_011906.1:g.26792C>T
LRG_8:g.26792C>T
LRG_8t1:c.835C>T	LRG_8p1:p.Gln279Ter

... more HGVS ... less HGVS

Protein change

Q279*

Other names

Canonical SPDI

NC_000002.12:166051847:G:A

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
SCN1A		Sufficient evidence for dosage pathogenicity	No evidence available	GRCh38 GRCh37	2244	4631

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Severe myoclonic epilepsy in infancy	Pathogenic (1)	criteria provided, single submitter	Sep 1, 2022	RCV002283766.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Pathogenic (Sep 01, 2022)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Severe myoclonic epilepsy in infancy Affected status: yes Allele origin: germline	3billion Accession: SCV002572832.1 First in ClinVar: Sep 17, 2022 Last updated: Sep 17, 2022	Publications: PubMed (1) PubMed: 21248271 Comment: The variant is not observed in the gnomAD v2.1.1 dataset. Stop-gained (nonsense) is predicted to result in a loss or disruption of normal protein function … (more) The variant is not observed in the gnomAD v2.1.1 dataset. Stop-gained (nonsense) is predicted to result in a loss or disruption of normal protein function through nonsense-mediated decay (NMD) or protein truncation. Multiple pathogenic variants are reported downstream of the variant. The variant has been reported to be associated with SCN1A -related disorder (PMID: 21248271). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline. (less) Clinical Features: Seizure (present) , Delayed speech and language development (present)

Comment:

The variant is not observed in the gnomAD v2.1.1 dataset. Stop-gained (nonsense) is predicted to result in a loss or disruption of normal protein function through nonsense-mediated decay (NMD) or protein truncation. Multiple pathogenic variants are reported downstream of the variant. The variant has been reported to be associated with SCN1A -related disorder (PMID: 21248271). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Genotype-phenotype associations in SCN1A-related epilepsies.	Zuberi SM	Neurology	2011	PMID: 21248271

Text-mined citations for this variant ...

Record last updated Aug 06, 2023

ClinVar Genomic variation as it relates to human health

NM_001165963.4(SCN1A):c.835C>T (p.Gln279Ter)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...