VCV001705760.4 - ClinVar

NM_000271.5(NPC1):c.2086del (p.Ala696fs)

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.

(3)

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/Likely 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_000271.5(NPC1):c.2086del (p.Ala696fs)

Variation ID: 1705760 Accession: VCV001705760.4

Type and length

Deletion, 1 bp

Location

Cytogenetic: 18q11.2 18: 23544388 (GRCh38) [ NCBI UCSC ] 18: 21124352 (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	Feb 20, 2024	Apr 22, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_000271.5:c.2086del MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_000262.2:p.Ala696fs	frameshift
NC_000018.10:g.23544389del
NC_000018.9:g.21124353del
NG_012795.1:g.47230del

Protein change

A696fs

Other names

Canonical SPDI

NC_000018.10:23544387:CC:C

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.
NPC1		-	-	GRCh38 GRCh37	2471	2529

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.
Niemann-Pick disease, type C1	Pathogenic/Likely pathogenic (3)	criteria provided, multiple submitters, no conflicts	Apr 22, 2023	RCV002284070.5

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 (Aug 30, 2022)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Niemann-Pick disease, type C1 Affected status: yes Allele origin: germline	Centogene AG - the Rare Disease Company Accession: SCV002573477.1 First in ClinVar: Sep 17, 2022 Last updated: Sep 17, 2022
Likely pathogenic (Dec 16, 2021)	criteria provided, single submitter (Myriad Women's Health Autosomal Recessive and X-Linked Classification Criteria (2021)) Method: clinical testing	Niemann-Pick disease, type C1 Affected status: unknown Allele origin: unknown	Myriad Genetics, Inc. Accession: SCV002604791.2 First in ClinVar: Nov 19, 2022 Last updated: Dec 24, 2022	Comment: NM_000271.4(NPC1):c.2086delG(A696Lfs33) is expected to be pathogenic in the context of Niemann-Pick disease type C1. This variant is predicted to lead to an abnormal or absent … (more) NM_000271.4(NPC1):c.2086delG(A696Lfs33) is expected to be pathogenic in the context of Niemann-Pick disease type C1. This variant is predicted to lead to an abnormal or absent protein product due to the creation of a premature termination codon in NPC1, a gene where loss-of-function variants are known to be pathogenic. Please note: this variant was assessed in the context of healthy population screening. (less)
Pathogenic (Apr 22, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Niemann-Pick disease, type C1 Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV004457545.1 First in ClinVar: Feb 20, 2024 Last updated: Feb 20, 2024	Publications: PubMed (1) PubMed: 9211850 Comment: For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 1705760). This variant has not been … (more) For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 1705760). This variant has not been reported in the literature in individuals affected with NPC1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Ala696Leufs*33) in the NPC1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NPC1 are known to be pathogenic (PMID: 9211850). (less)

Comment:

NM_000271.4(NPC1):c.2086delG(A696Lfs*33) is expected to be pathogenic in the context of Niemann-Pick disease type C1. This variant is predicted to lead to an abnormal or absent protein product due to the creation of a premature termination codon in NPC1, a gene where loss-of-function variants are known to be pathogenic. Please note: this variant was assessed in the context of healthy population screening.

Comment:

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 1705760). This variant has not been reported in the literature in individuals affected with NPC1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Ala696Leufs*33) in the NPC1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in NPC1 are known to be pathogenic (PMID: 9211850).

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
Murine model of Niemann-Pick C disease: mutation in a cholesterol homeostasis gene.	Loftus SK	Science (New York, N.Y.)	1997	PMID: 9211850

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_000271.5(NPC1):c.2086del (p.Ala696fs)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...