VCV002442437.2 - ClinVar

NM_019109.5(ALG1):c.1095_1098del (p.Leu366fs)

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.

Pathogenic

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_019109.5(ALG1):c.1095_1098del (p.Leu366fs)

Variation ID: 2442437 Accession: VCV002442437.2

Type and length

Microsatellite, 4 bp

Location

Cytogenetic: 16p13.3 16: 5082575-5082578 (GRCh38) [ NCBI UCSC ] 16: 5132576-5132579 (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	Mar 11, 2023	Feb 20, 2024	Oct 4, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_019109.5:c.1095_1098del MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_061982.3:p.Leu366fs	frameshift
NM_001330504.2:c.762_765del	NP_001317433.1:p.Leu255fs	frameshift
NC_000016.10:g.5082577TCTG[1]
NC_000016.9:g.5132578TCTG[1]
NG_009202.1:g.15769TCTG[1]
NG_132987.1:g.544TCTG[1]
NG_132988.1:g.42TCTG[1]

... more HGVS ... less HGVS

Protein change

L255fs, L366fs

Other names

Canonical SPDI

NC_000016.10:5082574:TGTCTGTCTG:TGTCTG

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.
ALG1		-	-	GRCh38 GRCh37	697	907

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.
not provided	Pathogenic (1)	criteria provided, single submitter	Sep 6, 2022	RCV003149209.1
ALG1-congenital disorder of glycosylation	Pathogenic (1)	criteria provided, single submitter	Oct 4, 2023	RCV003611630.2

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 06, 2022)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV003836884.1 First in ClinVar: Mar 11, 2023 Last updated: Mar 11, 2023	Comment: Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of … (more) Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 34020146) (less)
Pathogenic (Oct 04, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	ALG1-congenital disorder of glycosylation Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV004374980.1 First in ClinVar: Feb 20, 2024 Last updated: Feb 20, 2024	Publications: PubMed (3) PubMed: 20679665‚ 23806237‚ 34020146 Comment: This sequence change creates a premature translational stop signal (p.Leu366Thrfs11) in the ALG1 gene. It is expected to result in an absent or disrupted protein … (more) This sequence change creates a premature translational stop signal (p.Leu366Thrfs11) in the ALG1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ALG1 are known to be pathogenic (PMID: 20679665, 23806237). This variant is present in population databases (rs757512219, gnomAD 0.0009%). This premature translational stop signal has been observed in individual(s) with epilepsy of infancy with migrating focal seizures (EIMFS) (PMID: 34020146). ClinVar contains an entry for this variant (Variation ID: 2442437). For these reasons, this variant has been classified as Pathogenic. (less)

Comment:

Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 34020146)

Comment:

This sequence change creates a premature translational stop signal (p.Leu366Thrfs*11) in the ALG1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ALG1 are known to be pathogenic (PMID: 20679665, 23806237). This variant is present in population databases (rs757512219, gnomAD 0.0009%). This premature translational stop signal has been observed in individual(s) with epilepsy of infancy with migrating focal seizures (EIMFS) (PMID: 34020146). ClinVar contains an entry for this variant (Variation ID: 2442437). For these reasons, this variant has been classified as Pathogenic.

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
Clinical and genetic characteristics of epilepsy of infancy with migrating focal seizures in Chinese children.	Fang ZX	Epilepsy research	2021	PMID: 34020146
Molecular diagnostic testing for congenital disorders of glycosylation (CDG): detection rate for single gene testing and next generation sequencing panel testing.	Jones MA	Molecular genetics and metabolism	2013	PMID: 23806237
Guanosine diphosphate-mannose:GlcNAc2-PP-dolichol mannosyltransferase deficiency (congenital disorders of glycosylation type Ik): five new patients and seven novel mutations.	Dupré T	Journal of medical genetics	2010	PMID: 20679665

Text-mined citations for this variant ...

Record last updated Sep 30, 2024

ClinVar Genomic variation as it relates to human health

NM_019109.5(ALG1):c.1095_1098del (p.Leu366fs)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...