7-44513513-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001101648.2(NPC1L1):c.3933T>G(p.Phe1311Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

NPC1L1
NM_001101648.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.195

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.16785625).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
NPC1L1	NM_001101648.2 linkuse as main transcript	c.3933T>G	p.Phe1311Leu	missense_variant	19/19	ENST00000381160.8
NPC1L1	NM_013389.3 linkuse as main transcript	c.4014T>G	p.Phe1338Leu	missense_variant	20/20
NPC1L1	XM_011515326.4 linkuse as main transcript	c.3738T>G	p.Phe1246Leu	missense_variant	18/18
NPC1L1	XM_011515328.3 linkuse as main transcript	c.2292T>G	p.Phe764Leu	missense_variant	16/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NPC1L1	ENST00000381160.8 linkuse as main transcript	c.3933T>G	p.Phe1311Leu	missense_variant	19/19	1	NM_001101648.2	P1
NPC1L1	ENST00000289547.8 linkuse as main transcript	c.4014T>G	p.Phe1338Leu	missense_variant	20/20	1			Q9UHC9-1
NPC1L1	ENST00000546276.5 linkuse as main transcript	c.3795T>G	p.Phe1265Leu	missense_variant	18/18	1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

250940

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135754

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

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

Oct 06, 2021

The c.4014T>G (p.F1338L) alteration is located in exon 20 (coding exon 20) of the NPC1L1 gene. This alteration results from a T to G substitution at nucleotide position 4014, causing the phenylalanine (F) at amino acid position 1338 to be replaced by a leucine (L). 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

Pathogenic

0.64

BayesDel_addAF

Uncertain

0.023

BayesDel_noAF

Benign

-0.12

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.087

T;T;.

Eigen

Benign

-0.51

Eigen_PC

Benign

-0.71

FATHMM_MKL

Benign

0.084

LIST_S2

Benign

0.67

T;T;T

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.17

T;T;T

MetaSVM

Uncertain

-0.019

MutationAssessor

Benign

0.0

N;.;.

MutationTaster

Benign

0.99

N;N;N

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-1.3

N;N;N

REVEL

Uncertain

0.40

Sift

Uncertain

0.011

D;D;D

Sift4G

Benign

0.14

T;T;T

Vest4

0.38

MutPred

0.24

Gain of sheet (P = 0.0221);.;.;

MVP

0.87

MPC

0.70

ClinPred

0.24

GERP RS

-0.13

Varity_R

0.10

gMVP

0.61

Splicing

Name

Calibrated prediction

Score

Prediction

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