VCV002450345.3 - ClinVar

NM_144573.4(NEXN):c.1867C>T (p.Gln623Ter)

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.

(2)

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.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_144573.4(NEXN):c.1867C>T (p.Gln623Ter)

Variation ID: 2450345 Accession: VCV002450345.3

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 1p31.1 1: 77942668 (GRCh38) [ NCBI UCSC ] 1: 78408353 (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	Apr 15, 2023	Aug 25, 2024	Mar 14, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_144573.4:c.1867C>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_653174.3:p.Gln623Ter	nonsense
NM_001172309.2:c.1675C>T	NP_001165780.1:p.Gln559Ter	nonsense
NC_000001.11:g.77942668C>T
NC_000001.10:g.78408353C>T
NG_016625.1:g.59154C>T
NG_033243.2:g.41426G>A
LRG_442:g.59154C>T
LRG_442t1:c.1867C>T	LRG_442p1:p.Gln623Ter
LRG_995:g.41426G>A

... more HGVS ... less HGVS

Protein change

Q623*, Q559*

Other names

Canonical SPDI

NC_000001.11:77942667:C:T

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.
NEXN		-	-	GRCh38 GRCh37	648	728

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.
Cardiovascular phenotype	Uncertain significance (1)	criteria provided, single submitter	Mar 14, 2023	RCV003171388.2
not provided	Uncertain significance (1)	criteria provided, single submitter	May 27, 2022	RCV004697274.1

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.
Uncertain significance (Mar 14, 2023)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Cardiovascular phenotype Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV003853651.2 First in ClinVar: Apr 15, 2023 Last updated: May 01, 2024	Publications: PubMed (1) PubMed: 33552729 Comment: The p.Q623* variant (also known as c.1867C>T), located in coding exon 12 of the NEXN gene, results from a C to T substitution at nucleotide … (more) The p.Q623* variant (also known as c.1867C>T), located in coding exon 12 of the NEXN gene, results from a C to T substitution at nucleotide position 1867. This changes the amino acid from a glutamine to a stop codon within coding exon 12. This alteration occurs at the 3' terminus of theNEXN gene, is not expected to trigger nonsense-mediated mRNAdecay, and only impacts the last 7% of the protein. The exact functional effect of this alteration is unknown. This alteration has been reported in an idiopathic ventricular tachycardia cohort; however, clinical details were limited and additional alterations in other cardiac-related genes were identified (Guelly C et al. PeerJ, 2021 Jan;9:e10711). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less)
Uncertain significance (May 27, 2022)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	not provided Affected status: yes Allele origin: germline	Clinical Genetics Laboratory, Skane University Hospital Lund Accession: SCV005199469.1 First in ClinVar: Aug 25, 2024 Last updated: Aug 25, 2024

Comment:

The p.Q623* variant (also known as c.1867C>T), located in coding exon 12 of the NEXN gene, results from a C to T substitution at nucleotide position 1867. This changes the amino acid from a glutamine to a stop codon within coding exon 12. This alteration occurs at the 3' terminus of theNEXN gene, is not expected to trigger nonsense-mediated mRNAdecay, and only impacts the last 7% of the protein. The exact functional effect of this alteration is unknown. This alteration has been reported in an idiopathic ventricular tachycardia cohort; however, clinical details were limited and additional alterations in other cardiac-related genes were identified (Guelly C et al. PeerJ, 2021 Jan;9:e10711). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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
Patients with coronary heart disease, dilated cardiomyopathy and idiopathic ventricular tachycardia share overlapping patterns of pathogenic variation in cardiac risk genes.	Guelly C	PeerJ	2021	PMID: 33552729

Text-mined citations for this variant ...

Record last updated Aug 25, 2024

ClinVar Genomic variation as it relates to human health

NM_144573.4(NEXN):c.1867C>T (p.Gln623Ter)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...