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NM_000271.5(NPC1):c.3477+2T>C AND Niemann-Pick disease, type C1

Germline classification:
Pathogenic (1 submission)
Last evaluated:
Oct 30, 2023
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:
RCV000814344.6

Allele description

NM_000271.5(NPC1):c.3477+2T>C

Gene:
NPC1:NPC intracellular cholesterol transporter 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
18q11.2
Genomic location:
Preferred name:
NM_000271.5(NPC1):c.3477+2T>C
HGVS:
  • NC_000018.10:g.23535467A>G
  • NG_012795.1:g.56151T>C
  • NG_012795.2:g.56039T>C
  • NM_000271.5:c.3477+2T>CMANE SELECT
  • NC_000018.9:g.21115431A>G
  • NM_000271.4:c.3477+2T>C
Links:
dbSNP: rs772898831
NCBI 1000 Genomes Browser:
rs772898831
Molecular consequence:
  • NM_000271.5:c.3477+2T>C - splice donor variant - [Sequence Ontology: SO:0001575]

Condition(s)

Name:
Niemann-Pick disease, type C1
Synonyms:
NIEMANN-PICK DISEASE WITHOUT SPHINGOMYELINASE DEFICIENCY; Niemann-Pick disease with cholesterol esterification block; Niemann-Pick disease, chronic neuronopathic form; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0009757; MedGen: C3179455; Orphanet: 646; OMIM: 257220

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV000954748Invitae
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Pathogenic
(Oct 30, 2023) 		germlineclinical testing

PubMed (4)
[See all records that cite these PMIDs]

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

Splicing in action: assessing disease causing sequence changes.

Baralle D, Baralle M.

J Med Genet. 2005 Oct;42(10):737-48. Review.

PubMed [citation]
PMID:
16199547
PMCID:
PMC1735933

Murine model of Niemann-Pick C disease: mutation in a cholesterol homeostasis gene.

Loftus SK, Morris JA, Carstea ED, Gu JZ, Cummings C, Brown A, Ellison J, Ohno K, Rosenfeld MA, Tagle DA, Pentchev PG, Pavan WJ.

Science. 1997 Jul 11;277(5323):232-5.

PubMed [citation]
PMID:
9211850
See all PubMed Citations (4)

Details of each submission

From Invitae, SCV000954748.6

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (4)

Description

This sequence change affects a donor splice site in intron 22 of the NPC1 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in NPC1 are known to be pathogenic (PMID: 9211850). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. Disruption of this splice site has been observed in individual(s) with Niemann-Pick disease type C (PMID: 16126423). ClinVar contains an entry for this variant (Variation ID: 657686). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Feb 20, 2024