7-44516085-G-T

Position:

chr7-44516085-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP3

The NM_001101648.2(NPC1L1):c.3632C>A(p.Ala1211Glu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000497 in 1,610,312 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

NPC1L1
NM_001101648.2 missense, splice_region

Scores

Splicing: ADA: 0.9315

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.22

Variant links:

Genes affected

NPC1L1 (HGNC:7898): (NPC1 like intracellular cholesterol transporter 1) The protein encoded by this gene is a multi-pass membrane protein. It contains a conserved N-terminal Niemann-Pick C1 (NPC1) domain and a putative sterol-sensing domain (SSD) which includes a YQRL motif functioning as a plasma membrane to trans-Golgi network transport signal in other proteins. This protein takes up free cholesterol into cells through vesicular endocytosis and plays a critical role in the absorption of intestinal cholesterol. It also has the ability to transport alpha-tocopherol (vitamin E). The drug ezetimibe targets this protein and inhibits the absorption of intestinal cholesterol and alpha-tocopherol. In addition, this protein may play a critical role in regulating lipid metabolism. Polymorphic variations in this gene are associated with plasma total cholesterol and low-density lipoprotein cholesterol (LDL-C) levels and coronary heart disease (CHD) risk. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

NPC1L1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.771

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
NPC1L1	NM_001101648.2 linkuse as main transcript	c.3632C>A	p.Ala1211Glu	missense_variant, splice_region_variant	17/19	ENST00000381160.8
NPC1L1	NM_013389.3 linkuse as main transcript	c.3713C>A	p.Ala1238Glu	missense_variant, splice_region_variant	18/20
NPC1L1	XM_011515326.4 linkuse as main transcript	c.3437C>A	p.Ala1146Glu	missense_variant, splice_region_variant	16/18
NPC1L1	XM_011515328.3 linkuse as main transcript	c.1991C>A	p.Ala664Glu	missense_variant, splice_region_variant	14/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NPC1L1	ENST00000381160.8 linkuse as main transcript	c.3632C>A	p.Ala1211Glu	missense_variant, splice_region_variant	17/19	1	NM_001101648.2	P1
NPC1L1	ENST00000289547.8 linkuse as main transcript	c.3713C>A	p.Ala1238Glu	missense_variant, splice_region_variant	18/20	1			Q9UHC9-1
NPC1L1	ENST00000546276.5 linkuse as main transcript	c.3494C>A	p.Ala1165Glu	missense_variant, splice_region_variant	16/18	1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000480

AC:

AN:

1458124

Hom.:

Cov.:

AF XY:

0.00000828

AC XY:

AN XY:

724944

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 09, 2024

The c.3713C>A (p.A1238E) alteration is located in exon 18 (coding exon 18) of the NPC1L1 gene. This alteration results from a C to A substitution at nucleotide position 3713, causing the alanine (A) at amino acid position 1238 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.56

BayesDel_addAF

Pathogenic

0.34

BayesDel_noAF

Pathogenic

0.25

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.48

T;T;.

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.82

T;T;T

M_CAP

Benign

0.084

MetaRNN

Pathogenic

0.77

D;D;D

MetaSVM

Uncertain

0.38

MutationAssessor

Benign

1.9

M;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-2.1

N;N;N

REVEL

Pathogenic

0.79

Sift

Uncertain

0.0040

D;D;D

Sift4G

Benign

0.12

T;T;T

Vest4

0.78

MutPred

0.68

Gain of disorder (P = 0.0884);.;.;

MVP

0.96

MPC

0.59

ClinPred

0.96

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.54

gMVP

0.98

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.93

dbscSNV1_RF

Pathogenic

0.73

SpliceAI score (max)

0.0

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over