rs1805081

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBA1

The ENST00000269228.10(NPC1):ā€‹c.644A>Gā€‹(p.His215Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.379 in 1,613,400 control chromosomes in the GnomAD database, including 123,029 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (ā˜…ā˜…). Synonymous variant affecting the same amino acid position (i.e. H215H) has been classified as Likely benign.

Frequency

Genomes: š‘“ 0.29 ( 8271 hom., cov: 32)
Exomes š‘“: 0.39 ( 114758 hom. )

Consequence

NPC1
ENST00000269228.10 missense

Scores

1
17

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:15

Conservation

PhyloP100: 0.593
Variant links:
Genes affected
NPC1 (HGNC:7897): (NPC intracellular cholesterol transporter 1) This gene encodes a large protein that resides in the limiting membrane of endosomes and lysosomes and mediates intracellular cholesterol trafficking via binding of cholesterol to its N-terminal domain. It is predicted to have a cytoplasmic C-terminus, 13 transmembrane domains, and 3 large loops in the lumen of the endosome - the last loop being at the N-terminus. This protein transports low-density lipoproteins to late endosomal/lysosomal compartments where they are hydrolized and released as free cholesterol. Defects in this gene cause Niemann-Pick type C disease, a rare autosomal recessive neurodegenerative disorder characterized by over accumulation of cholesterol and glycosphingolipids in late endosomal/lysosomal compartments.[provided by RefSeq, Aug 2009]

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

PM1
In a topological_domain Lumenal (size 238) in uniprot entity NPC1_HUMAN there are 40 pathogenic changes around while only 17 benign (70%) in ENST00000269228.10
BP4
Computational evidence support a benign effect (MetaRNN=0.0017139614).
BP6
Variant 18-23560468-T-C is Benign according to our data. Variant chr18-23560468-T-C is described in ClinVar as [Benign]. Clinvar id is 92714.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr18-23560468-T-C is described in Lovd as [Benign].
BA1
GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.407 is higher than 0.05.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
NPC1NM_000271.5 linkuse as main transcriptc.644A>G p.His215Arg missense_variant 6/25 ENST00000269228.10 NP_000262.2

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
NPC1ENST00000269228.10 linkuse as main transcriptc.644A>G p.His215Arg missense_variant 6/251 NM_000271.5 ENSP00000269228 P1O15118-1
NPC1ENST00000540608.5 linkuse as main transcriptn.558A>G non_coding_transcript_exon_variant 4/162

Frequencies

GnomAD3 genomes
AF:
0.294
AC:
44703
AN:
152014
Hom.:
8271
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.0792
Gnomad AMI
AF:
0.322
Gnomad AMR
AF:
0.269
Gnomad ASJ
AF:
0.257
Gnomad EAS
AF:
0.250
Gnomad SAS
AF:
0.257
Gnomad FIN
AF:
0.478
Gnomad MID
AF:
0.197
Gnomad NFE
AF:
0.411
Gnomad OTH
AF:
0.267
GnomAD3 exomes
AF:
0.331
AC:
82692
AN:
250070
Hom.:
15205
AF XY:
0.336
AC XY:
45507
AN XY:
135354
show subpopulations
Gnomad AFR exome
AF:
0.0702
Gnomad AMR exome
AF:
0.247
Gnomad ASJ exome
AF:
0.260
Gnomad EAS exome
AF:
0.246
Gnomad SAS exome
AF:
0.278
Gnomad FIN exome
AF:
0.457
Gnomad NFE exome
AF:
0.404
Gnomad OTH exome
AF:
0.330
GnomAD4 exome
AF:
0.388
AC:
566798
AN:
1461268
Hom.:
114758
Cov.:
40
AF XY:
0.385
AC XY:
279556
AN XY:
726982
show subpopulations
Gnomad4 AFR exome
AF:
0.0597
Gnomad4 AMR exome
AF:
0.253
Gnomad4 ASJ exome
AF:
0.258
Gnomad4 EAS exome
AF:
0.267
Gnomad4 SAS exome
AF:
0.280
Gnomad4 FIN exome
AF:
0.454
Gnomad4 NFE exome
AF:
0.419
Gnomad4 OTH exome
AF:
0.349
GnomAD4 genome
AF:
0.294
AC:
44713
AN:
152132
Hom.:
8271
Cov.:
32
AF XY:
0.293
AC XY:
21757
AN XY:
74360
show subpopulations
Gnomad4 AFR
AF:
0.0790
Gnomad4 AMR
AF:
0.269
Gnomad4 ASJ
AF:
0.257
Gnomad4 EAS
AF:
0.250
Gnomad4 SAS
AF:
0.258
Gnomad4 FIN
AF:
0.478
Gnomad4 NFE
AF:
0.411
Gnomad4 OTH
AF:
0.271
Alfa
AF:
0.372
Hom.:
27372
Bravo
AF:
0.269
TwinsUK
AF:
0.420
AC:
1557
ALSPAC
AF:
0.427
AC:
1645
ESP6500AA
AF:
0.0878
AC:
387
ESP6500EA
AF:
0.403
AC:
3462
ExAC
AF:
0.327
AC:
39711
Asia WGS
AF:
0.231
AC:
804
AN:
3478
EpiCase
AF:
0.387
EpiControl
AF:
0.371

ClinVar

Significance: Benign
Submissions summary: Benign:15
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Niemann-Pick disease, type C1 Benign:7
Benign, no assertion criteria providedclinical testingDiagnostic Laboratory, Department of Genetics, University Medical Center Groningen-- -
Benign, criteria provided, single submitterclinical testingClinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical CenterSep 21, 2015- -
Benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 2018This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, no assertion criteria providedclinical testingNatera, Inc.Sep 16, 2020- -
Benign, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpFeb 01, 2024- -
Benign, no assertion criteria providedclinical testingGenome Diagnostics Laboratory, Amsterdam University Medical CenterOct 05, 2016- -
Benign, criteria provided, single submitterclinical testingGenome-Nilou LabJun 10, 2021- -
not specified Benign:6
Benign, no assertion criteria providedclinical testingClinical Genetics, Academic Medical Center-- -
Likely benign, no assertion criteria providedclinical testingGenetic Services Laboratory, University of Chicago-Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
Benign, criteria provided, single submitterclinical testingEurofins Ntd Llc (ga)Jul 24, 2015- -
Benign, criteria provided, single submitterclinical testingPreventionGenetics, part of Exact Sciences-- -
Benign, criteria provided, single submitterclinical testingLaboratory for Molecular Medicine, Mass General Brigham Personalized MedicineMar 28, 2016Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Frequency -
Benign, no assertion criteria providedclinical testingJoint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+-- -
not provided Benign:2
Benign, no assertion criteria providedclinical testingMayo Clinic Laboratories, Mayo ClinicOct 21, 2015- -
Benign, criteria provided, single submitternot providedBreakthrough Genomics, Breakthrough Genomics-- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.052
BayesDel_addAF
Benign
-0.58
T
BayesDel_noAF
Benign
-0.46
CADD
Benign
5.3
DANN
Benign
0.45
DEOGEN2
Uncertain
0.48
T
Eigen
Benign
-0.96
Eigen_PC
Benign
-0.93
FATHMM_MKL
Benign
0.28
N
LIST_S2
Benign
0.59
T
MetaRNN
Benign
0.0017
T
MetaSVM
Benign
-1.0
T
MutationAssessor
Benign
1.2
L
MutationTaster
Benign
1.0
P
PrimateAI
Benign
0.35
T
PROVEAN
Benign
-1.4
N
REVEL
Benign
0.15
Sift
Benign
0.53
T
Sift4G
Benign
0.58
T
Polyphen
0.0
B
Vest4
0.026
MPC
0.31
ClinPred
0.0039
T
GERP RS
-1.1
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.11
gMVP
0.29

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.010
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs1805081; hg19: chr18-21140432; COSMIC: COSV52576882; COSMIC: COSV52576882; API